| A | Appraisal (well) | | | | Details |
| A | Abstract | | | | Details |
| A | abstract(i.e., A-10) | | | | Details |
| Å | angstrom unit | | | | Details |
| A | Asset | | | | Details |
| A | Chisel-shaped inserts | | | | Details |
| A | Action | | | | Details |
| a | ambient | | | | Details |
| A | Ansammlung | | | | Details |
| A | Appraisal (well) | Appraisal (well) | Bewertung (gut) | Appréciation (bien) | Details |
| A | Abstract | Abstract | Abstrakt | Abstrait | Details |
| A | abstract(i.e., A-10) | abstract (i.e., A-10) | abstrakt (das heißt, A-10) | abstrait (à savoir, A-10) | Details |
| Å | angstrom unit | angstrom unit | Ångstrom-Einheiten | Unité de angström | Details |
| A | ampere | | | | Details |
| a | annum (sidereal year) | | | | Details |
| DRAD | Drainage Radii|| | drainage radii | Entwässerungsradien | rayons de drainage | Details |
| NAG | Non Associated Gas|| | Non Associated Gas | Nicht vorhandenes Gas | Gaz non associés | Details |
| LA | Laufende|| | Ongoing | laufend | En cours | Details |
| anz | Anzahl|| | number | Nummer | nombre | Details |
| JICA | Japan International Cooperation Agency|| | Japan International Cooperation Agency | Japan International Cooperation Agency | Agence japonaise de coopération internationale | Details |
| LFA | Laufende|| | Ongoing | laufend | En cours | Details |
| CAO | Chief Accounting Officer|| | Chief Accounting Officer | Chief Accounting Officer | Chief Accounting Officer | Details |
| CAO | Chief Administrative Officer|| | Chief Administrative Officer | Chief Administrative Officer | Directeur administratif | Details |
| CAO | Chief Analytics Officer|| | Chief Analytics Officer | Chief Analytics Officer | Chief Analytics Officer | Details |
| UA | unter anderem|| | amongst other things | unter anderem | entre autres choses | Details |
| u.a. | unter anderem|| | amongst other things | unter anderem | entre autres choses | Details |
| ABF | Ammonbiflorid|| | Ammonbiflorid | Ammonbiflorid | Ammonbiflorid | Details |
| AUFW | Aufwältigung|| | workover | Überarbeitungs | workover | Details |
| ABW | Abwältigung|| | Abwältigung | Abwältigung | Abwältigung | Details |
| Bleiabdruck | Impression Block|| | impression block | Eindruck Block | bloc d'impression | Details |
| AG | Auftraggeber (AS-PD, AS-PE, Projektleiter)|| | Client (AS-PD, AS PE, project manager) | Client (AS-PD, AS PE, Projektleiter) | Client (AS-PD, AS PE, chef de projet) | Details |
| LA | Laufende Behandlungen|| | Ongoing treatments | Laufende Behandlungen | traitements en cours | Details |
| LAE | Laufende Behandlungen Energize|| | Ongoing treatments Energize | Laufende Behandlungen Energize | traitements en cours Energize | Details |
| DA | Diplom Arbeit|| | thesis | These | thèse | Details |
| Pac | Authorization & Market Chance|| | Authorization & Market opportunity | Authorization & Market Gelegenheit | Autorisation et marché occasion | Details |
| FAQ | Frequently Asked Question|| | Frequently Asked Question | Oft gestellte Frage | Question fréquemment posée | Details |
| FAQs | Frequently Asked Questions|| | Frequently Asked Questions | Häufig gestellte Fragen | Questions fréquemment posées | Details |
| CSRA | Cost & Schedule Risk Analysis|| | Cost & Schedule Risk Analysis | Cost & Schedule Risk Analysis | Coût et calendrier Analyse des risques | Details |
| HSLA | High Strength Low Alloy|| | High Strength Low Alloy | High Strength Low Alloy | Haute résistance faiblement allié | Details |
| FGAS | Fremd Gas|| | foreign gas | Fremdgas | gaz étranger | Details |
| F-GAS | Fremd Gas|| | foreign gas | Fremdgas | gaz étranger | Details |
| EGAS | Eigen Gas|| | own gas | eigene Gas | gaz propre | Details |
| E-gas | Eigen Gas|| | own gas | eigene Gas | gaz propre | Details |
| AECV | additional emergency control valve|| | additional emergency control valve | zusätzliche Notfall-Regelventil | soupape de commande d'urgence supplémentaire | Details |
| ad | Außendurchmesser|| | outer diameter | Außendurchmesser | diamètre extérieur | Details |
| Egas | Eigen Gas|| | own gas | eigene Gas | gaz propre | Details |
| E-gas | Eigen Gas|| | own gas | eigene Gas | gaz propre | Details |
| $/amt | U.S. dollars per amount to be defined | | | | Details |
| $/gal | U.S. dollars per gallon | | | | Details |
| 2CAL | 2-Arm Caliper Log | | | | Details |
| 3CAL | 3-Arm Caliper Log | | | | Details |
| 4CAL | 4-Arm Caliper Log | | | | Details |
| A CHL | Atlantic Chlorinlog | | | | Details |
| A&A | adjustments and allowances | | | | Details |
| A&D | Acquisition & Divestment | | | | Details |
| A&V | Assessment & Verification Process | | | | Details |
| A.Ü | Anlage übersiedelt | | | | Details |
| A/ | acidized with | | | | Details |
| A/C | air conditioning | | | | Details |
| A/CLD | air cooled | | | | Details |
| A/CLR | air cooler | | | | Details |
| A/H | Anchor Handling | | | | Details |
| A/P | accounts payable | | | | Details |
| A/R | accounts receivable | | | | Details |
| A/S | AlongSide | | | | Details |
| AA | Always Afloat | | | | Details |
| AA | ARUBA | | | | Details |
| AA | as above | | | | Details |
| AA | after acidizing, as above | | | | Details |
| AAAA | Always Afloat Always Accessible | | | | Details |
| AACT | Aluminium Clay Tool | | | | Details |
| AACT | Aluminium Activation Clay Tool | | | | Details |
| AADE | American Association of Drilling Engineers | | | | Details |
| AAF | Access Authorization Form | | | | Details |
| AAI | Absolute Acoustic Impedance | | | | Details |
| AAIOR | annualized average incremental oil rate | | | | Details |
| AAL | Acoustic Amplitude | | | | Details |
| AAMO | Apparent Anisotropic Move Out (WesternGeco) | | | | Details |
| AAODC | American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC) | | | | Details |
| AAODC | American Association of Oilwell Drilling Contractors | | | | Details |
| AAODC | See IADC | | | | Details |
| AAP | After Action Review | | | | Details |
| AAP | Afro-Arab Petroleum Trading & Petrochemicals WLL Kuwait | | | | Details |
| AAPA | the American Association of Port Authorities | | | | Details |
| AAPEA | Australian Petroleum Production and Exploration Association | | | | Details |
| AAPG | American Association of Petroleum Geologists | | | | Details |
| AAPL | American Association of Petroleum Landmen | | | | Details |
| AAPL | American Association of Professional Landmen | | | | Details |
| AAR | After Action Review (What went right/wrong, dif next time) | | | | Details |
| AAR | after action review | | | | Details |
| AAR | Association of American Railroads | | | | Details |
| AARA | Amsterdam-Antwerpen-Rotterdam Area | | | | Details |
| AASP | allowable annular surface pressure | | | | Details |
| AAV | Annulus Access Valve | | | | Details |
| AB | Arbeitsbühne | Drill floor, rig floor, work platform…. | | | Details |
| ABAN | Abandonment | | | | Details |
| ABC | Analysis Behind Casing (using CHDT) | | | | Details |
| ABC | Audit Bureau of Circulation | | | | Details |
| ABCM | Activity Based Costing Model | | | | Details |
| abd | abandoned | | | | Details |
| abd loc | abandoned location | | | | Details |
| abd-gw | abandoned gas well | | | | Details |
| abd-ogw | abandoned oil & gas well | | | | Details |
| abd-ow | abandoned oil well | | | | Details |
| AbEx | Abandonment Expense | | | | Details |
| A-BHC | Amplitude Logging | | | | Details |
| ABHL | absolute bottom hole location | | | | Details |
| ABHL | absolute bottom-hole location | | | | Details |
| ABM | Atlas Bradford modified | | | | Details |
| abnd | abandoned | | | | Details |
| abndt | abundant | | | | Details |
| ABO | Aker Borgestad Operations | | | | Details |
| ABOI | Assn. of British Oceanic Industries UK | | | | Details |
| abrsi | jet abrasive jet | | | | Details |
| ABS | American Bureau of Shipping | | | | Details |
| abs | absolute | | | | Details |
| ABS | acrylonitrile butadiene styrene rubber | | | | Details |
| ABS | Anti Block System | | | | Details |
| ABSA | Alberta Boilers Safety Association | | | | Details |
| absm | absorption | | | | Details |
| ABSORB | Alaska Beaufort Seat Oil Spill Response Body | | | | Details |
| abst | abstract | | | | Details |
| ABT | ABouT | | | | Details |
| ABT | Ambitious Business Target | | | | Details |
| abun | abundant | | | | Details |
| abv | above | | | | Details |
| ABW | Available Bit Weight | | | | Details |
| ABW | ARUBA | | | | Details |
| AC | Alternative Current | | | | Details |
| AC | BHC Acoustilog | | | | Details |
| AC | ANTIGUA AND BARBUDA | | | | Details |
| ac | acre, acres | | | | Details |
| ac | acid | | | | Details |
| ac | acre(s), acreage | | | | Details |
| AC | alternating current | | | | Details |
| AC | Austin chalk | | | | Details |
| AC | Acoustilog | | | | Details |
| AC PAR 16 | Acoustic Parameter-16mm Scope | | | | Details |
| AC PAR D | Acoustic Parameter-Depth | | | | Details |
| AC PAR L | Acoustic Parameter-Logging | | | | Details |
| AC SIGN | Acoustic Signature | | | | Details |
| AC/CAL | Acoustilog Caliper Gamma Ray Neutron | | | | Details |
| AC/CAL | BHC Acoustilog Caliper | | | | Details |
| AC/CAL | BHC Acoustilog Caliper (Thru Casing) | | | | Details |
| AC/CAL GR | Acoustilog Caliper Gamma Ray | | | | Details |
| AC/CAL NEU | Acoustilog Caliper Neutron | | | | Details |
| AC/CAL/ | BHC Acoustilog Caliper G/R Neutron | | | | Details |
| AC/CAL/GR | BHC Acoustilog Caliper Gamma Ray | | | | Details |
| AC/NUE | BHC Acoustilog Caliper Neutron | | | | Details |
| ACA | after closure analysis; a fracture performance test method | | | | Details |
| ACAL | AcoustiCaliper | | | | Details |
| ACC | access | | | | Details |
| ACCEL | accelerometers | | | | Details |
| ACCESS | accessory, accessories | | | | Details |
| ACCR | Accelerometer Corrections Preprocessing (CIBLSM PREP) | | | | Details |
| acct | account(ing) | | | | Details |
| accum | accumulative, accumulator | | | | Details |
| acd | acidize(ed)(ing) | | | | Details |
| ACDS | Axilary compression tension sub | | | | Details |
| ACE | Acoustic Caliber Log | | | | Details |
| A-Cem | acoustic cement | | | | Details |
| ACFM | actual cubic feet per minute | | | | Details |
| acfr | acid fracture treatment | | | | Details |
| ac-ft | acre-feet | | | | Details |
| ACGIH | American Conference of Industrial Hygienists | | | | Details |
| ACHE | Air Cooled Heat Exchanger | | | | Details |
| ACL | Access Control List | | | | Details |
| ACL | Long-Spaced BHC Acoustilog | | | | Details |
| ACLR | air cooler | | | | Details |
| ACM | acid-cut mud | | | | Details |
| ACMP | Alaska Costal Management Program | | | | Details |
| ACNA | Aziende Colori Nazionali Affini Italy | | | | Details |
| ACOU | Acoustic | | | | Details |
| ACP | Annulus Casing Packers | | | | Details |
| ACP | Area Contingency Plan | | | | Details |
| ACP | Acoustic Parameter | | | | Details |
| ACP | Association des Consultants Petroliers France | | | | Details |
| ACPA | Alexandria Co. for Petroleum Additives Egypt | | | | Details |
| ACPHA | Association Cooperative pour la Recherche et l’Exploration des Hydrocarbures en Algerie Algeria | | | | Details |
| ACQ | Annual Contract Quantity (in reference to gas sales) | | | | Details |
| ACQU | Acquisition log | | | | Details |
| acrg | acreage | | | | Details |
| ACRONYMS | AND ABBREVIATIONSAC–4 PRUDENT DEVELOPMENT: Realizing the Potential of North America’s Abundant Natural Gas and Oil Resources | | | | Details |
| ACS | Anti Collision System | | | | Details |
| ACS | American Chemical Society | | | | Details |
| acs | acre, acres | | | | Details |
| ACSL | Acoustic | | | | Details |
| ACSR | aluminum conductor steel reinforced | | | | Details |
| ACT | Geochemical Logging Tool | | | | Details |
| ACT | Action | | | | Details |
| ACT | actual | | | | Details |
| ACT | actuated, actuator | | | | Details |
| ACT | automatic custody transfer | | | | Details |
| ACT | Aluminum Clay Log | | | | Details |
| ACT | Geochemical Log | | | | Details |
| ACTS | Auxiliary Compression Tension Sub | | | | Details |
| ACV | Approved/Authorized Contract Value | | | | Details |
| ACV | Adjustable Choke Valve | | | | Details |
| ACV | Automatic Control Valve (actuator valves on the separator) | | | | Details |
| ACV | annular safety valve | | | | Details |
| ACW | acid-cut water | | | | Details |
| AD | Assistant Driller | | | | Details |
| AD | ANDORRA | | | | Details |
| AD | Associated Dissolved (natural gas) | | | | Details |
| AD | actual drilling | | | | Details |
| AD | authorized depth | | | | Details |
| ADA | Air Drilling Assosiates | | | | Details |
| ADB | Asian Development Bank (—) | | | | Details |
| ADC | Advanced Gauge Data Conditioning (Pansystem software) | | | | Details |
| ADC | Analog-to-Digital Converter | | | | Details |
| ADC | actual drilling cost | | | | Details |
| ADCO | Abu Dhabi Company for Onshore Oil Operations | | | | Details |
| ADCO | Abu Dhabi Co. for Onshore Oil Operations Abu Dhabi | | | | Details |
| ADCOM | ADress COMission | | | | Details |
| add | additive | | | | Details |
| ADDC | Association of Desk and Derrick Clubs | | | | Details |
| ADDCAP | Abu Dhabi Drilling Chemicals and Products Ltd. Abu Dhabi | | | | Details |
| addl | additional | | | | Details |
| ADE | Asphaltene Deposition Envelop | | | | Details |
| ADEP | Awaiting Development with Exploration Potential, referring to an asset | | | | Details |
| ADEPT | Adaptive Electromagnetic Propagation Log | | | | Details |
| ADESCO | Abu Dhabi Emergency Committee of Offshore Operators | | | | Details |
| ADF | Automatic Diverter Flowmeter | | | | Details |
| ADGAS | Abu Dhabi Gas Liquefaction Co. Ltd. Abu Dhabi | | | | Details |
| ADH | adhesive | | | | Details |
| ADIPEC | Abu Dhabi International Petroleum Conference | | | | Details |
| adj | adjustable | | | | Details |
| ADL | above detection level | | | | Details |
| ADM | Administration Manager | | | | Details |
| adm | administration, administrative | | | | Details |
| ADMA | Abu Dhabi Marine Operating Company | | | | Details |
| ADMA-OPCO | Abu Dhabi Marine Operating Co. Abu Dhabi | | | | Details |
| ADN | Azimuthal Density Neutron (Schlumberger) | | | | Details |
| ADN | Azimuthal Density Neutron | | | | Details |
| ADNATCO | Abu Dhabi National Tanker Co. Abu Dhabi | | | | Details |
| ADNOC | Abu Dhabi National Oil Company Abu Dhabi | | | | Details |
| ADNOC-FOD | Abu Dhabi National Oil Company for Distribution Abu Dhabi | | | | Details |
| ADOM | adomite | | | | Details |
| ADP | automatic data processing | | | | Details |
| ADPC | Abu Dhabi Petroleum Company | | | | Details |
| ADPC | Abu Dhabi Petroleum Co. Ltd. Abu Dhabi | | | | Details |
| ADPPOC | Abu Dhabi Petroleum Ports Operating Co. Abu Dhabi | | | | Details |
| adpt | adapter | | | | Details |
| ADR | Appropriate Dispute Resolution (see comment) | | | | Details |
| ADROC | Advanced Rock Properties Report | | | | Details |
| ADSC | Abu Dhabi Shipbuilding Company | | | | Details |
| ADSC | The International Association of Foundation Drilling | | | | Details |
| ADSL | Asymmetrical Digital Subscriber Line | | | | Details |
| ADSM | Adstar Distributed Storage Manager | | | | Details |
| adspn | adsorption | | | | Details |
| ADST | Asphaltene Dispersant Testing | | | | Details |
| ADT | Applied Drilling Technology, ADT Log | | | | Details |
| ADT | Array Dielectric Tool (SLB tool) | | | | Details |
| ADT | Abstract Data Type | | | | Details |
| ADT | actual drilling time | | | | Details |
| advan | advanced | | | | Details |
| ADWEA | Abu Dhabi Water and Electricity Authority | | | | Details |
| AE | UNITED ARAB EMIRATES | | | | Details |
| AEC | Anion Exchange Capacity (see comment) | | | | Details |
| AEC | Abu Dhabi Engineering Center | | | | Details |
| AEC | Atomic Energy Commission | | | | Details |
| AECRB | Alberta Energy Conservation Resources Board | | | | Details |
| AED | Automated external defibrillator | | | | Details |
| AED | Arab Emirates Dirham | | | | Details |
| AEG | Association of Engineering Geologists | | | | Details |
| AEGPL | Assn. Europeenne des Gaz de Petrole Liquifies France | | | | Details |
| AEI | Advanced Energy Initiative | | | | Details |
| AEO | Annual Energy Outlook, EIA | | | | Details |
| AEPL | Albario Engineering (Pvt) Ltd | | | | Details |
| AER | Alberta Energy Regulator | | | | Details |
| AER | aeration, aerator | | | | Details |
| AESF | Applied Energy Studies Foundation | | | | Details |
| AESP | Association of Energy Services Companies | | | | Details |
| AEUB | Alberta Energy & Utility Board | | | | Details |
| AF | AFGHANISTAN | | | | Details |
| AF | acid frac | | | | Details |
| AF | after fracture | | | | Details |
| AF/CLR | after cooler | | | | Details |
| AF/COND | after condenser | | | | Details |
| AFA | Advanced Fluid Analyzer | | | | Details |
| AFAIK | As far as I know | | | | Details |
| AFC | Approved For Construction | | | | Details |
| AFC | Arab Finance Corporation | | | | Details |
| AFC | Authorization for Commitment | | | | Details |
| AFC | Authorized for Construction | | | | Details |
| AFD | Agence Française du Développement | | | | Details |
| AFD | authorization for definition | | | | Details |
| AFD | auxiliary flow diagram | | | | Details |
| AFE | Authorization for Expenditure, a process of submitting a business proposal to investors | | | | Details |
| AFE | Authorization for Expenditure | | | | Details |
| AFESD | Arab Fund for Economic and Social Development | | | | Details |
| affd | affirmed | | | | Details |
| afft | affidavit | | | | Details |
| AFG | AFGHANISTAN | | | | Details |
| AFG | Assn. Francaise du Gaz France | | | | Details |
| Afi | Acoustic Fracture Identification | | | | Details |
| AFIT | after federal income tax | | | | Details |
| AFLASTM | a high temperature seal elastomer | | | | Details |
| AFLD | Annular Fluid Loss Device (ie Halliburton's Twin Flow tool) | | | | Details |
| AFP | Active Fire Protection | | | | Details |
| AFP | annular friction pressure | | | | Details |
| AFP | Aker Floating Production | | | | Details |
| AFP | average flowing pressure | | | | Details |
| AFPC | Al-Furat Petroleum Company | | | | Details |
| AFPC | Al Forat Petroleum Company Syria and others | | | | Details |
| AFPR | Annual Field Perf Review | | | | Details |
| AFPR | Acquisition Foot Print Removal | | | | Details |
| AFRA | average freight rate assessment | | | | Details |
| AFS | Atomic Fluorescence Spectroscopy | | | | Details |
| AFSPS | Arrival First Sea Pilot Station ( Norway) | | | | Details |
| AFSSA | Aviation Fueling Services S.A. Greece | | | | Details |
| AFT | Activation Flow Tool | | | | Details |
| AFTP | Assn. Francaise des Techniciens et Professionals du Petrole France | | | | Details |
| AFUDC | allowance for funds used during construction | | | | Details |
| AFV | annular flow valve | | | | Details |
| AFW | Appraisal Framing Workshop | | | | Details |
| AG | ALGERIA | | | | Details |
| AG | ANTIGUA AND BARBUDA | | | | Details |
| AG | Arbeitgeberin | | | | Details |
| AG | Arbeitsgas (Volume of gas you can take out of the UGS w/o jepordizing the charatristics of the reservoir) | | | | Details |
| AG | agitator | | | | Details |
| AGA | American Gas Association | | | | Details |
| AGA | Australian Gas Assn. Australia | | | | Details |
| AGAS | Associated Gas Supplies Ltd. UK | | | | Details |
| Agate | siliceous rock with alternating bands of chalcedony and colored chert | | | | Details |
| AGC | Automatic Gain Control | | | | Details |
| AGC | Advanced Gas Conversion | | | | Details |
| AGGI | Asab Gas Gathering & Injection | | | | Details |
| AGGR | aggregate | | | | Details |
| AGI | American Geological Institute | | | | Details |
| AGIBA | Agiba Petroleum Company Egypt | | | | Details |
| agim | agglomerate | | | | Details |
| AGIP | Azienda Generale Italiana Petroli S.p.A. (see ENI) Italy | | | | Details |
| AGO | ANGOLA | | | | Details |
| aGOC | Actual Gas Oil Contact | | | | Details |
| AGOC | Aramco Gulf Operations Co. Ltd. Saudi Arabia | | | | Details |
| Agoco | Arabian Gulf Oil Company | | | | Details |
| AGOCO | Arabian Gulf Oil Company Libya | | | | Details |
| AGORA | Adaptative Ground Roll Attenuation (from CGG) | | | | Details |
| AGP | Asab Gas Plant | | | | Details |
| AGR | Azimuthal Gamma Ray | | | | Details |
| AGRU | acid gas removal unit | | | | Details |
| AGS | Aluminium Gamma Ray Spectroscopy Sonde | | | | Details |
| AGTC | Agarwal-Gardner Type-Curves | | | | Details |
| AGTL | Alberta Gas Trunkline Co., LTD. | | | | Details |
| AGU | American Geophysical Union | | | | Details |
| AGV | Arbeitsgasvolumen (Volume of gas you can take out of the UGS w/o jepordizing the charatristics of the reservoir) | | | | Details |
| AGW | All Going Well | | | | Details |
| AGW | Anthropogenic global warming | | | | Details |
| AH | along hole | | | | Details |
| AH | ASHMORE AND CARTIER ISLANDS | | | | Details |
| AHA | Activity Hazard Analysis | | | | Details |
| AHBDF | Along Hole (Depth) Below Derrick Floor | | | | Details |
| AHBDF | Along Hole Below Derrick Floor | | | | Details |
| AHD | along hole depth | | | | Details |
| AHD | Along Hole Displacement | | | | Details |
| AHERA | Asbestos Hazard Emergency Response Act of 1986 (Title II of TSCA) | | | | Details |
| AHL | Amerada Hess Ltd. UK | | | | Details |
| AHMD | along hole Measured Depth (used when doing sidetrack, sames as normal "m MD") | | | | Details |
| AHN | Amerada Hess Norge A/S Norway | | | | Details |
| AHQ | ASHMORE AND CARTIER ISLANDS | | | | Details |
| AHT | AnchorHandling Tug | | | | Details |
| AHV | Anchor Handling Vessel | | | | Details |
| AI | Acoustic Impedance | | | | Details |
| AI | Artificial Intellince | | | | Details |
| AI | ASHMORE AND CARTIER ISLANDS | | | | Details |
| AI | ANGUILLA | | | | Details |
| AI&DM | Artificial Inteligence & Data Mining | | | | Details |
| AIA | ANGUILLA | | | | Details |
| AICHE | American Institute of Chemical Engineers | | | | Details |
| AID | Computed Process/Laser | | | | Details |
| AIDA | Asset Integrity Data Assessment System | | | | Details |
| AIDMO | Arab Industrial Development and Mining Organization | | | | Details |
| AIDP | Addendum to Initial Development Plan | | | | Details |
| AIG | Australian Institute of Geoscientists Australia | | | | Details |
| AIME | American Institute of Mining, Metallurgical and Petroleum Engineers | | | | Details |
| AIMP | Asset Integrity Management Plan | | | | Details |
| AIMS | Asset Integrity Management System | | | | Details |
| AIOC | Azerbaijan International Operating Company | | | | Details |
| AIP | Annular Isolation Packer | | | | Details |
| AIP | Aeronautical Information Publication (UAE) | | | | Details |
| AIP | Australian Institute of Petroleum | | | | Details |
| AIP | Australian Institute of Petroleum Australia | | | | Details |
| AIPAC | American Israeli Public Affairs Committee | | | | Details |
| AIPG | American Institute of Professional Geologists | | | | Details |
| AIPK | American International Petroleum Kazakhstan Kazakhstan | | | | Details |
| Air | Standard density of dry air, free of CO2 at 0oC is 1.292 g/L | | | | Details |
| AIR | average injection rate | | | | Details |
| AIR | COND air conditioning | | | | Details |
| AIRG | Airgun | | | | Details |
| AIRRE | Airgun Report | | | | Details |
| AIS | Annular Isolation System (Completions) | | | | Details |
| AIS | annular isolation sleeve | | | | Details |
| AISI | American Iron and Steel Institute | | | | Details |
| AIT | Array Induction Tool | | | | Details |
| AIT | Array Induction Imager | | | | Details |
| AIT | Array Induction imager Tool | | | | Details |
| AITSI | Arab Internationally Traded Stock Index | | | | Details |
| AJ | AZERBAIJAN | | | | Details |
| AJT | actual jetting time | | | | Details |
| AK | Alaska | | | | Details |
| AK | Anlage Kontrolle | | | | Details |
| AKA | Also Known As | | | | Details |
| AKAP | Aker Kvaerner Australia Pty Ltd. | | | | Details |
| AKO | Adjustable Kick Off | | | | Details |
| AL | Appraisal Licence (United Kingdom), a type of onshore licence issued before 1996 | | | | Details |
| AL | Air Line (in air driling or UBD/MPD drilling) | | | | Details |
| AL | Artificial Lift | | | | Details |
| AL | ALBANIA | | | | Details |
| Al | Alabama | | | | Details |
| AL | aluminum | | | | Details |
| ALA | ALAND ISLANDS | | | | Details |
| ALARA | as low as reasonably achievable | | | | Details |
| ALARP | As Low As Reasonably Practicable | | | | Details |
| ALARP | As Low As Reasonably Practical | | | | Details |
| ALAT | Azimuthal Laterolog | | | | Details |
| ALB | ALBANIA | | | | Details |
| Alb | Albany | | | | Details |
| Alba | Aluminium Bahrain BSC | | | | Details |
| ALBPETROL | Albanian Petroleum Corporation Albania | | | | Details |
| ALC | Vertical Seismic Profile Acoustic Log Calibration Report | | | | Details |
| ALC | Agricultural Land Commission (see comment) | | | | Details |
| alc | alcoholic | | | | Details |
| ALC | Acoustilog | | | | Details |
| ALC-GR | Acoustilog Caliper-Gamma Ray | | | | Details |
| ALC-GRN | Acoustilog Caliper-Gamma Ray-Neutron | | | | Details |
| ALC-N | Acoustilog Caliper-Neutron | | | | Details |
| ALCOA | Aluminum Company of America | | | | Details |
| ALD | Azimuthal Litho Density (logging control) | | | | Details |
| ALD | Azimuthal Litho Density | | | | Details |
| ALEPCO | Ste. Algero-Arab-Libyenne d’Exploitation et de Production des Produits Petroliers Algeria | | | | Details |
| ALG | Algerian | | | | Details |
| alg | along | | | | Details |
| alg | algae | | | | Details |
| ALICO | American Life Insurance Company | | | | Details |
| ALIGN | alignment(ing) | | | | Details |
| alk | alkaline, alkalinity | | | | Details |
| Alkyd | a resin formed by reaction of polyhydric alcohols and polybasic salts Saturated or unsaturated oils or fats are involved | | | | Details |
| alkyl | alkylate, alkylation | | | | Details |
| ALLOW | allowable, allowance | | | | Details |
| alm | alarm | | | | Details |
| ALOC | allocation | | | | Details |
| ALR | Acoustic Log Report | | | | Details |
| ALR | Agricultural Land Reserve (see comment) | | | | Details |
| ALS | Artificial Lift System | | | | Details |
| alt | alternate | | | | Details |
| ALT | altitude | | | | Details |
| ALU | ALUminium | | | | Details |
| ALU | Arithmetic Logic Unit | | | | Details |
| Alum | aluminum and potassium sulfate compound Used was water clairfying | | | | Details |
| ALY | alloy | | | | Details |
| AM | ARMENIA | | | | Details |
| AM | Audit memoranda | | | | Details |
| AM | autom. Druckmessung Speicher | | | | Details |
| amb | ambient | | | | Details |
| aMDEA | activated methyldiethanolamine | | | | Details |
| AMDP | Aramco Mobile Drilling Platform | | | | Details |
| AMEP | African Middle East Petroleum Company | | | | Details |
| Amex | American Express Bank | | | | Details |
| AMF | Arab Monetary Fund | | | | Details |
| AMI | area of mutal interest | | | | Details |
| AMI | Area of Mutual Interest | | | | Details |
| AMI | Associazione Mineraria Italiana Italy | | | | Details |
| Aminoil | American Independent Oil Company | | | | Details |
| AMM | ammeter | | | | Details |
| AMO | Azimuth Move Out | | | | Details |
| amor | amorphous | | | | Details |
| amort | amortization | | | | Details |
| AMP | Amplitude | | | | Details |
| AMP | American melting point | | | | Details |
| amp | ampere | | | | Details |
| amph | amphipore | | | | Details |
| Amph | Amphistegina | | | | Details |
| amp-hr | ampere hour | | | | Details |
| AMPOL | Australian Petroleum Pty. Ltd. Australia | | | | Details |
| AMPS | a copolymer Acrylamido-methyl-propane sulfonate polymer | | | | Details |
| AMPTC | Arab Maritime Petroleum Transport Co. OAPEC | | | | Details |
| AMR | addition or modification reque | | | | Details |
| AMS | Auxiliary Measurement Service Log | | | | Details |
| AMS | Auxiliary Measurement Sonde | | | | Details |
| AMS | Auxiliary Measurements Log | | | | Details |
| AMSL | above mean sea level | | | | Details |
| amt | amount | | | | Details |
| amt/yr | amount to be defined per year | | | | Details |
| AMV | Annulus Master Valve | | | | Details |
| AN | ANDORRA | | | | Details |
| AN | NETHERLANDS ANTILLES | | | | Details |
| an | annulus | | | | Details |
| ANACO | Analysis of Core Logs Report | | | | Details |
| anal | analysis, analytical | | | | Details |
| ANARE | Analysis Report | | | | Details |
| ANB | Arab National Bank | | | | Details |
| ANBA | Arab Bankers Association of North America | | | | Details |
| ANC | Anchor(age) | | | | Details |
| ANCAP | Administracion Nacional de Combustibles, Alcohol y Portland Uruguay | | | | Details |
| AND | ANDORRA | | | | Details |
| ANG | Associated Natural Gas | | | | Details |
| ang | angle, angular | | | | Details |
| ANGA | American Natural Gas Association | | | | Details |
| ANGA | America’s Natural Gas Alliance | | | | Details |
| ANGTS | Alaska Natural Gas Transportation System | | | | Details |
| Angul | Angulogerina | | | | Details |
| ANHY | Anhydrite | | | | Details |
| anhy | anhydrite (itic) | | | | Details |
| anhy | anhydrite, anhydritic | | | | Details |
| anhyd | anhydrous | | | | Details |
| Anion | an ion with a negative charge | | | | Details |
| ANISC | Alexandria National Iron and Steel Company | | | | Details |
| ANN | Artificial Neural Network | | | | Details |
| Anode | the positively charged site in a cell Oxidation site The site of metal loss in corrosion | | | | Details |
| anode | Corrosion prevention device | | | | Details |
| ANOVA | Analysis Of Variance | | | | Details |
| ANP | Agency National Petroleum for Brazil | | | | Details |
| ANPC | Afghan National Petroleum Co. Afghanistan | | | | Details |
| ANR | amount not reported | | | | Details |
| ANS | Alaskan North Slope | | | | Details |
| ANSDK | Alexandria Iron and Steel Company | | | | Details |
| ANSI | American National Standards Institute | | | | Details |
| ANT | NETHERLANDS ANTILLES | | | | Details |
| ANTHAM | ANTwerp-HAMburg range | | | | Details |
| antr | antransportiert | | | | Details |
| ANUB | annubar | | | | Details |
| ANUC | annunciator | | | | Details |
| ANWR | Arctic National Wildlife Refuge | | | | Details |
| ANYA | allowable not yet available | | | | Details |
| AO | ANGOLA | | | | Details |
| AOAC | Association of Official Agricultural Chemists | | | | Details |
| AOB | Any Other Business | | | | Details |
| AOC | Arabian Oil Company | | | | Details |
| AOC | Aramco Overseas Company | | | | Details |
| AOC | Arabian Oil Company Ltd. Japan | | | | Details |
| AOC | Aramco Overseas Company Netherlands, China, Korea | | | | Details |
| AOCS | American Oil Chemists Society | | | | Details |
| AOF | Absolute Open Flow | | | | Details |
| AOF | Absolute Open-hole Flow | | | | Details |
| AOF | see Absolute Open Flow The maximum rate that a well can produce at the lowest possible bottom hole pressure (usually figured with a gas gradient) | | | | Details |
| AOF | absolute open flow potential(gas well) | | | | Details |
| AOFP | Absolute Open Flow Potential | | | | Details |
| AOGA | Alaskan Oil & Gas Association | | | | Details |
| AOI | Area Of Interest | | | | Details |
| AoO | Area of Operation | | | | Details |
| AOP | Asset Open Plan | | | | Details |
| AOP | Asphaltene Onset Pressure | | | | Details |
| AOPL | Association of Oil Pipe Lines | | | | Details |
| AOR | authorized over-run | | | | Details |
| AORV | Annulus Operated Reversing Valve (Expro DST tool) | | | | Details |
| AOSC | Association of Oilwell Servicing Contractors | | | | Details |
| AOV | Air Operated Valve | | | | Details |
| AP | Annular Pressure | | | | Details |
| AP&VMA | American Paint & Varnish Manufacturers Assn. | | | | Details |
| AP1 | Alpine 571 (ausgesch.) | | | | Details |
| AP2 | Alpine 574 (ausgesch.) | | | | Details |
| APB | annular pressure build up | | | | Details |
| APC | Arab Potash Company Ltd. | | | | Details |
| APC | Anadarko Petroleum Corporation | | | | Details |
| APC | American Power Conversion | | | | Details |
| APC | Alexandria Petroleum Company Egypt | | | | Details |
| APCD | air pollution control device | | | | Details |
| APD | Application for Permit to Drill | | | | Details |
| APD | Application to Permit to Drill | | | | Details |
| APD | approved permit to drill | | | | Details |
| APE | area petroleum engineer | | | | Details |
| APE | authorization for expenditure | | | | Details |
| APEC | Asia Pacific Economic Cooperation Forum | | | | Details |
| APEGA | Association of Professional Engineers and Geoscientists of Alberta | | | | Details |
| APEGGA | Association of Professional Engineers, Geologists and Geophysicists of Alberta | | | | Details |
| APG | Assn. of Policy Geomorphologists Poland | | | | Details |
| APHA | American Public Health Association | | | | Details |
| API | American Petroleum Institute: both the organisation and measure of oil weight (API gravity) in ºAPI | | | | Details |
| API | American Petroleum Institute | | | | Details |
| API | Acquisition, Processing and Interpretation of seismic data | | | | Details |
| API | Anonima Petroli Italiana S.p.A. Italy | | | | Details |
| APIA | Australian Pipeline Industry Assn. Inc. Australia | | | | Details |
| Apicorp | Arab Petroleum Investment Corporation | | | | Details |
| APM | Administered Price Mechanism | | | | Details |
| APO | After Pay Out | | | | Details |
| APP | Associate Professional Program | | | | Details |
| app | appears, appearance | | | | Details |
| APPAR | apparatus | | | | Details |
| appd | approved | | | | Details |
| APPEA | Australian Petroleum Production & Exploration Assn. Australia | | | | Details |
| appl | appliance | | | | Details |
| appl | applied | | | | Details |
| applic | application | | | | Details |
| APPRE | Appraisal Report | | | | Details |
| approx | approximate | | | | Details |
| approx | approximately | | | | Details |
| approx | approximate(ly) | | | | Details |
| APR | Annual Percentage Rate | | | | Details |
| APR | annular pressure relief valve Used in reverse circulating to prevent pipe collapse | | | | Details |
| APR | trademarked name for an annular pressure response valve – for a DST string | | | | Details |
| apr | apparent(ly) | | | | Details |
| APR | average penetration rate | | | | Details |
| APRA | American Petroleum Refiners Association | | | | Details |
| APRC | Arab Petroleum Research Center France | | | | Details |
| APRC | Amerya Petroleum Refining Company Egypt | | | | Details |
| APRV | annular pressure relief valve | | | | Details |
| APS | Active Pipe Support | | | | Details |
| APS | Accelerator Porosity Sonde | | | | Details |
| APS | Arrival Pilot Station | | | | Details |
| APSCO | Arab Petroleum Services Co. OAPEC | | | | Details |
| apt | apartment | | | | Details |
| APTI | Arab Petroleum Training Institute OAPEC | | | | Details |
| APU | Al-’Azizia Panda United Inc. | | | | Details |
| APW | Association of Petroleum Writers | | | | Details |
| APWD | Annulas Pressure While Drilling | | | | Details |
| APX | Accoustic Porosity Explorer | | | | Details |
| AQ | AMERICAN SAMOA | | | | Details |
| AQ | ANTARCTICA | | | | Details |
| aq | aqueous | | | | Details |
| AQCR | air quality control region | | | | Details |
| AQL | acceptance quality level | | | | Details |
| AQMA | air quality maintenance area | | | | Details |
| AQMD | Air Quality Management District | | | | Details |
| AR | Attraction & Recruitment (HR Dept) | | | | Details |
| AR | Automatic Release | | | | Details |
| AR | Annual Reviews or Acceptance Review | | | | Details |
| AR | Action Required | | | | Details |
| AR | Area Representative, Application Record | | | | Details |
| AR | Administrative Requirement | | | | Details |
| AR | ARGENTINA | | | | Details |
| AR | Arkansas | | | | Details |
| AR | acid residue | | | | Details |
| Ara | Arapahoe | | | | Details |
| ARACL | Array Acoustic Log | | | | Details |
| ARAG | Amsterdam-Rotterdam-Antwerp-Gent range | | | | Details |
| arag | aragonite | | | | Details |
| Aramco | Arabian American Oil Company | | | | Details |
| ARAMCO | (see Saudi Aramco) (formerly Arabian American Oil Company) Saudi Arabia | | | | Details |
| ARATS | Automated Reserves Audit Trail System | | | | Details |
| Arb | Arbuckle | | | | Details |
| Arbift | Arab Bank for Investment and Foreign Trade | | | | Details |
| ARC | Array Restistivity Compensated tool (LWD) | | | | Details |
| ARC | Array Compensated Resistivity | | | | Details |
| arch | architectural | | | | Details |
| Archeo | Archeozoic | | | | Details |
| Arco | Atlantic Richfield Company | | | | Details |
| ARCO | Atlantic Richfield Co. | | | | Details |
| ARE | UNITED ARAB EMIRATES | | | | Details |
| aren | arenaceous | | | | Details |
| ARESV | Analysis of Reservoir | | | | Details |
| ARG | ARGENTINA | | | | Details |
| arg | argillaceous | | | | Details |
| arg | argillite | | | | Details |
| ARI | Azimuthal Resistivity Image | | | | Details |
| ARI | Azimuthal Resistivity Imager | | | | Details |
| Arig | Arab Insurance Group | | | | Details |
| ark | arkosic | | | | Details |
| ark | arkose(ic) | | | | Details |
| Arka | Arkadelphia | | | | Details |
| ARKLA | Arkansas Louisiana Gas Co. | | | | Details |
| ARM | Advanced RISC Machines | | | | Details |
| ARM | ARMENIA | | | | Details |
| arm | armature | | | | Details |
| ARMP | Approved Resource Management Plan | | | | Details |
| arnd | around | | | | Details |
| ARO | after receipt of order(purchasing term) | | | | Details |
| ARO-at | rate of | | | | Details |
| arom | aromatics | | | | Details |
| ARP | Alberta Recommended Practice | | | | Details |
| ARP | Asset Reference Plan | | | | Details |
| ARPEL | Assistencia Reciproca Petrolera Empresarial Latinoamerica Regional Assn. of Oil & Natural Gas Cos. in Latin America and the Caribbean)(—) | | | | Details |
| ARPR | Annual Report of Petroleum Resources (Reserves) | | | | Details |
| ARPR | Annual Reservoir Performance Review | | | | Details |
| ARPR | Annual Reservoir Performance Report | | | | Details |
| arq | argillaceous | | | | Details |
| ARR | arrange(ed)(ing)(ment) | | | | Details |
| ARRC | Array Acoustic Report | | | | Details |
| ARSR | Alagal, Rudist, Skeletal, Rudstone | | | | Details |
| ART | Acid Response Test | | | | Details |
| ART | actuator running tool | | | | Details |
| ARTS | Annulus Reference Trap System (Expro DST tool, like PORT of SLB) | | | | Details |
| AS | Array Sonic Processing Log | | | | Details |
| AS | Asset | | | | Details |
| AS | AUSTRALIA | | | | Details |
| AS | AMERICAN SAMOA | | | | Details |
| As | arsenic | | | | Details |
| AS | after shot | | | | Details |
| AS | anhydrite stringer | | | | Details |
| AS&W | ga American Steel & Wire gauge | | | | Details |
| ASA | Advanced Safety Auditing (Shell/BP system) | | | | Details |
| ASA | American Statistical Association | | | | Details |
| ASA | American Standards Association | | | | Details |
| ASA | American Standards Assoc. | | | | Details |
| ASAP | as soon as possible | | | | Details |
| asb | asbestos | | | | Details |
| asbr | absorber | | | | Details |
| ASC | Affiliated Services Contract | | | | Details |
| ASC | Aramco Services Company | | | | Details |
| ASCE | American Society of Civil Engineers | | | | Details |
| ASCII | American Standard Code for Information Interchange | | | | Details |
| ASCSSV | Annulus Surface Controlled Sub Surface Valve | | | | Details |
| ASD | Acoustic Sand Detection | | | | Details |
| ASD | abandon-salvage deferred | | | | Details |
| ASEAN | Association of Southeast Asian Nations | | | | Details |
| ASEG | Australian Society of Exploration Geophysicists Australia | | | | Details |
| ASESA | Asfaltes Espanoles S.A. Spain | | | | Details |
| ASFB | Algal, Skeletal Floatstone-Boundstone. | | | | Details |
| ASFB | Algal, Skeletal, Floatstone-Boundstone | | | | Details |
| asgmt | assignment | | | | Details |
| Ash | ashern | | | | Details |
| ASHRAE | American Society of Heating, Refrigerating and Air-Conditioning Engineers | | | | Details |
| ASHRAE | American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. | | | | Details |
| ASI | ASI Log | | | | Details |
| ASIC | Application Specific Integrated Circuit (SLB, a chip for signal processing of gauges) | | | | Details |
| ASINs | Amazon Standard Identification Numbers | | | | Details |
| ASL | Arab Super Light | | | | Details |
| ASL | Amplitude Sonic | | | | Details |
| ASL | Acoustic Scope Picture | | | | Details |
| ASL | Fracture Finder | | | | Details |
| ASLD | Azimuthal Stabilized Litho Density | | | | Details |
| ASLE | American Society of Lubricating Engineers | | | | Details |
| ASM | AMERICAN SAMOA | | | | Details |
| ASME | American Society of Mechanical Engineers | | | | Details |
| ASO | acid-soluble oil | | | | Details |
| ASP | Alkaline Surfactant Polymer | | | | Details |
| ASP | Array Sonic Processing Report | | | | Details |
| ASPF | Algal, Skeletal, Peloid Floatstone-Rudstone | | | | Details |
| ASPG | American Society of Professional Geologists | | | | Details |
| Asph | asphaltene | | | | Details |
| asph | asphaltic | | | | Details |
| asph | asphalt. asphaltic | | | | Details |
| ASPO | Association for the Study of Peak Oil | | | | Details |
| ASPO-USA | Association for the Study of Peak Oil-USA | | | | Details |
| ASPW | Any Safe Port in the World | | | | Details |
| ASRL | Alberta Sulfur Research Ltd | | | | Details |
| ASRY | Arab Shipbuilding and Repair Yard | | | | Details |
| ASRY | Arab Shipbuilding & Repair Yard Co. OAPEC | | | | Details |
| Ass | Associated (gas) | | | | Details |
| Ass.gas | Associated (gas) | | | | Details |
| Assay | analyze | | | | Details |
| ASSE | American Society of Safety Engineers | | | | Details |
| assgd | assigned | | | | Details |
| ASSMR | American Society for Surface Mining and Reclamation | | | | Details |
| assn | association | | | | Details |
| assoc | associate(d)(s) | | | | Details |
| asst | assistant | | | | Details |
| assy | assembly | | | | Details |
| AstFB | Algal, Stromatoporoid, Skeletal, Floatstone-Boundstone | | | | Details |
| ASTM | American Society for Testing and Materials | | | | Details |
| ASTM | American Society of Testing Materials | | | | Details |
| ASTM | American Society of Testing and Materials | | | | Details |
| ASTM | American Society for Testing Materials | | | | Details |
| astn | asphaltic stain | | | | Details |
| ASV | Annular Sliding Valve | | | | Details |
| ASV | Annular Safety Valve | | | | Details |
| ASW | adjustable spring wedge | | | | Details |
| AT | AUSTRALIA | | | | Details |
| AT | ASHMORE AND CARTIER ISLANDS | | | | Details |
| AT | AUSTRALIA | | | | Details |
| AT | AUSTRIA | | | | Details |
| AT | Aufnahme Test (injection test) | | | | Details |
| At | Total Area of the field | | | | Details |
| AT | acid treat(ment) | | | | Details |
| AT | after treatment | | | | Details |
| AT | all-thread | | | | Details |
| At | Atoka | | | | Details |
| at | atomic | | | | Details |
| ATA | Advanced Technology Attachment | | | | Details |
| ATA | ANTARCTICA | | | | Details |
| ATAS | Anadolu Tastiyehanesi A.S. Turkey | | | | Details |
| ATC | after top center | | | | Details |
| ATCE | Annual Technical Conference and Exhibition | | | | Details |
| ATD | application to drill | | | | Details |
| ATD | approved total depth | | | | Details |
| ATDNSHINC | Any Time Day/Night Sundays and Holidays INCluded | | | | Details |
| ATF | Automatic Transmission Fluid (see comment) | | | | Details |
| ATF | FRENCH SOUTHERN TERRITORIES | | | | Details |
| ATF | automatic transmission fluid | | | | Details |
| ATG | Automatik Tank Gauge | | | | Details |
| ATG | ANTIGUA AND BARBUDA | | | | Details |
| ATLANTICO | Compania Espanola de Petroleos Atlantico S.A. Spain | | | | Details |
| ATM | Automatic Teller Machine | | | | Details |
| atm | atmospheres | | | | Details |
| atm | atmosphere, atmospheric | | | | Details |
| ATP | advanced technology parts | | | | Details |
| ATP | average treating pressure | | | | Details |
| ATP | Authorization to Proceed | | | | Details |
| ATP | average tubing pressure | | | | Details |
| ATR | Action Track Register | | | | Details |
| ATSDR | Agency for Tonic Substances and Disease Registry | | | | Details |
| att | attempt, attempting | | | | Details |
| ATT | after the tanks | | | | Details |
| ATT | attach(ed)(ing)(ment) | | | | Details |
| att | attempt(ed) | | | | Details |
| atty | attorney | | | | Details |
| ATUTC | Actually Time Used To Count | | | | Details |
| ATV | all terrain vehicle | | | | Details |
| ATW | Applied Technology Workshop | | | | Details |
| at-wt | atomic weight | | | | Details |
| AU | Assessment unit | | | | Details |
| AU | AUSTRIA | | | | Details |
| AU | AUSTRALIA | | | | Details |
| AÜ | Anlage übersiedelt | | | | Details |
| aud | auditorium | | | | Details |
| AUD | Audio Logging | | | | Details |
| AUP | Advanced University Placement (PI) | | | | Details |
| AUS | AUSTRALIA | | | | Details |
| Aus | Austin | | | | Details |
| AUT | AUSTRIA | | | | Details |
| auth | authorized | | | | Details |
| auto | automatic | | | | Details |
| auto | automotive | | | | Details |
| autogas | automotive gasoline | | | | Details |
| AUV | Autonomous Underwater Vehicle | | | | Details |
| aux | auxiliary | | | | Details |
| AV | Annular Velocity or Apparent Viscosity | | | | Details |
| AV | Annular Velocity | | | | Details |
| AV | Audio Video | | | | Details |
| AV | ANGUILLA | | | | Details |
| AV | Aux Vases sand | | | | Details |
| av | aviation | | | | Details |
| AVA | Amplitude Versus Angle | | | | Details |
| avail | available | | | | Details |
| AVAZ | Amplitude Versus Azimuth | | | | Details |
| AVC | automatic volume control | | | | Details |
| avg | average | | | | Details |
| avgas | aviation gasoline | | | | Details |
| AVL | Acoustic Velocity | | | | Details |
| AVO | Amplitude Versus Offset (geophysics) | | | | Details |
| AVO | Amplitude Versus Offset | | | | Details |
| AW | ARUBA | | | | Details |
| AW | acid water | | | | Details |
| Aw | drainage Area of a single Well | | | | Details |
| AWB | Annulus Wing Block (XT) | | | | Details |
| AWB/V | annulus wing block/valve (XT) | | | | Details |
| AWD | award | | | | Details |
| AWG | American Wire Gauge | | | | Details |
| AWGRS | Alaska well’s group reporting system | | | | Details |
| AWO | Approval for Well Operation | | | | Details |
| AWO | Approval Well Operation | | | | Details |
| aWOC | Actual Water Oil Contact | | | | Details |
| AWR | Array Wave Resistivity (PathFinder) | | | | Details |
| AWS | Acoustic well sounder | | | | Details |
| AWS | American Welding Society | | | | Details |
| AWSBU | Acoustic well sounder build-up | | | | Details |
| AWT | Advanced Wastewater Treatment | | | | Details |
| awtg | awaiting | | | | Details |
| AWV | Annulus Wing Valve | | | | Details |
| AWWA | American Water Works Association | | | | Details |
| AX | ALAND ISLANDS | | | | Details |
| AXORC | Assuit Oil Refining Company Egypt | | | | Details |
| AY | ANTARCTICA | | | | Details |
| AZ | AZERBAIJAN | | | | Details |
| AZ | Arizona | | | | Details |
| az | azimuth | | | | Details |
| AZD | Azimuthal Density | | | | Details |
| AZD | Azimuth Dipfrac | | | | Details |
| AZE | AZERBAIJAN | | | | Details |
| Azi | Azimuth | | | | Details |
| aztrop | Azeotrophic | | | | Details |
| BA | Breathing Apparatus | | | | Details |
| BA | Bridging Agreement | | | | Details |
| BA | Bottom Assembly (of a riser) | | | | Details |
| BA | Bachelor of Arts | | | | Details |
| BA | BAHRAIN | | | | Details |
| BA | BOSNIA AND HERZEGOVINA | | | | Details |
| BA | barrels of acid | | | | Details |
| BAA | Business Area Alignment | | | | Details |
| BAC | Blood Alcohol Concentration | | | | Details |
| BACB | British Arab Commercial Bank | | | | Details |
| BACT | Best Available Control Technology | | | | Details |
| BADEA | Arab Bank for Economic Development in Africa | | | | Details |
| BADR | Banque de l’Agriculture et du Développement Rural | | | | Details |
| BAe | British Aerospace | | | | Details |
| BAF | Bunker adjusting factor (freight) | | | | Details |
| bail | bail, bailed | | | | Details |
| bail | bail(ed) | | | | Details |
| BAL | Bond Attenuation Log | | | | Details |
| BAL | balance | | | | Details |
| BAL | Bound Attenuation Log | | | | Details |
| Ball | Balltown sand | | | | Details |
| BANAGAS | Bahrain National Gas Co. BSC Bahrain | | | | Details |
| BANANA | Build Absolutely Nothing Anywhere Near Anybody | | | | Details |
| Banoco | Bahrain National Oil Company | | | | Details |
| BANOCO | Bahrain National Oil Company Bahrain | | | | Details |
| BAP | Biodiversity Action Plan | | | | Details |
| BAP | Bore/Annular Pressure | | | | Details |
| Bapco | Bahrain Petroleum Company | | | | Details |
| BAPCO | Bahrain Petroleum Company BSC Bahrain | | | | Details |
| Bapetco | Badr al-Din Petroleum Company | | | | Details |
| BAPETCO | Badr El Deen Petroleum Co. Egypt | | | | Details |
| BAPEX | Bangladesh Petroleum Exploration Company Ltd. Bangladesh | | | | Details |
| bar | barite(ic) | | | | Details |
| Bar | Barlow Lime | | | | Details |
| bar | barometer, barometric | | | | Details |
| BAR | barrels acid residue | | | | Details |
| Barge | marine vessel without its own propulsion | | | | Details |
| Bark | Crk Barker Creek | | | | Details |
| BARS | Borehole Acoustic Reflection Survey | | | | Details |
| Bart | Bartlesville | | | | Details |
| base | basement(granite) | | | | Details |
| BASF | Badische Anilin & Soda Frabrik AG Germany | | | | Details |
| BASH | Bourne-Again Shell | | | | Details |
| BASIC | Beginners All Purpose Symbolic Instruction Code | | | | Details |
| Basin | a large area with a general containment and an often thick accumulation of rock | | | | Details |
| BaSO4 | barium sulfate | | | | Details |
| BAST | Best available and safest technology | | | | Details |
| BAT | Best Available Technology | | | | Details |
| BAT | Bi-Modal Acoustic Tool | | | | Details |
| bat | battery | | | | Details |
| BAT | before acid treatment | | | | Details |
| Bate | Bateman | | | | Details |
| Batelco | Bahrain Telecommunications Co. | | | | Details |
| BATS | Borehole Audio Tracer Survey | | | | Details |
| BAW | barrels acid water | | | | Details |
| BAWPD | barrels acid water per day | | | | Details |
| BAWPH | barrels acid water per hour | | | | Details |
| BAWUL | barrels acid water under load | | | | Details |
| Bd’A | Bois d’ Arc | | | | Details |
| BDA | Break Down Acid | | | | Details |
| BDA | breakdown acid | | | | Details |
| Bean | a flow restriction common in downhole chokes, surface chokes and some SSSVs | | | | Details |
| Bear | Riv Bear River | | | | Details |
| BFA | BURKINA FASO | | | | Details |
| BHA | Bottom Hole Assembly (toolstring on coiled tubing or drill pipe) | | | | Details |
| BHA | Bottom Hole Assembly | | | | Details |
| BHA | bottom-hole assembly | | | | Details |
| BHC AL TC | BHC Acoustilog Caliper (Thru Casing) | | | | Details |
| BHC ALC | BHC Acoustilog Caliper | | | | Details |
| BHC ALC GR | BHC Acoustilog Caliper Gamma Ray | | | | Details |
| BHC ALC GRN | BHC Acoustilog Caliper G/R Neutron | | | | Details |
| BHC ALC N | BHC Acoustilog Caliper Neutron | | | | Details |
| BHC ALGRNTC | BHC Acoustilog Caliper G/R Neutron (Thru Casing) | | | | Details |
| BHCA | BHC Acoustic Log | | | | Details |
| BIAT | Banque Internationale Arabe de Tunisie | | | | Details |
| BL&AW | barrels load & acid water | | | | Details |
| bld-gas | bleeding gas | | | | Details |
| BMA | Bahrain Monetary Agency | | | | Details |
| BMAO | Bank Muscat al-Ahli al-Omani | | | | Details |
| Bol.a. | Bolivina a. | | | | Details |
| BOMA | ball out mud acid | | | | Details |
| BOTAS | BOTAS, Petroleum Pipeline Corp. Ltd. Turkey | | | | Details |
| BPA | Bonneville Power Administration, DOE | | | | Details |
| BPWA | Beam Pump Well Analyzer (Dyno & FL) | | | | Details |
| BRA | BRAZIL | | | | Details |
| brach | brachiopod | | | | Details |
| brack | brackish | | | | Details |
| BRASPETRO | Petrobras Internacional S.A. Brazil | | | | Details |
| BTA | Basic Travel Allowance | | | | Details |
| BTA | Business Travel Approval | | | | Details |
| BWA | BOTSWANA | | | | Details |
| BWAD | Brackish Water Arrival Draft | | | | Details |
| C&A | compression and absorption plant | | | | Details |
| C/A | commission agent | | | | Details |
| CA | Core Analysis Log | | | | Details |
| CA | Corrosion Allowance | | | | Details |
| CA | Certification Authority | | | | Details |
| CA | CANADA | | | | Details |
| CA | Chartered Accountant | | | | Details |
| CA | California | | | | Details |
| CA | Compressional Amplitude | | | | Details |
| CAA | Clean Air Act | | | | Details |
| CAB | cabinet | | | | Details |
| Cable | one of various braided cables, with or without isolated conductance wires, used for well operations | | | | Details |
| CaBr2 | calcium bromide | | | | Details |
| CAC | Competence Assurance Coordinator | | | | Details |
| CAC | Circumferential Acoustilog | | | | Details |
| CaCl2 | calcium chloride salt | | | | Details |
| CaCO3 | calcium carbonate | | | | Details |
| CAD | Computer Aided Design | | | | Details |
| CAD | computer-aided design | | | | Details |
| Cadd | Caddell | | | | Details |
| CADE | Canadian Association of Drilling Engineers | | | | Details |
| CAF | Currency adjusting factor (freight) | | | | Details |
| CAF | CENTRAL AFRICAN REPUBLIC | | | | Details |
| CAFE | Corporate Average Fuel Economy | | | | Details |
| CAG | cut across grain | | | | Details |
| CAGC | A combine: Continental Oil Co., Atlantic Richfield Co., and Cities Service Oil Co. | | | | Details |
| CAGCT | Centre for Advanced Gas Combustion Technology | | | | Details |
| CAGR | compound annual growth rate | | | | Details |
| CAIR | Comprehensive Assessment Information Rule (under TSCA) | | | | Details |
| CAL | Caliper | | | | Details |
| CAL | Computed Gafillla | | | | Details |
| CAL | Section Gauge | | | | Details |
| CAL | Country Alert Level | | | | Details |
| cal | calcite, calcitic | | | | Details |
| cal | caliche | | | | Details |
| CAL | caliper log | | | | Details |
| cal | caliper survey | | | | Details |
| cal | calorie | | | | Details |
| CAL | Caliper Logging | | | | Details |
| CAL | Computer Analyzed Log | | | | Details |
| CAL | Four-Arm Caliber Log | | | | Details |
| CAL | Perforation Depth Control Log | | | | Details |
| CAL | Caltex Australia Ltd. Australia | | | | Details |
| CALA | Calipet Analysis | | | | Details |
| CALA | Caliper Analysis | | | | Details |
| calc | calcareous | | | | Details |
| CALC | Caliper Curve | | | | Details |
| Calc | calcareous, calcerenite | | | | Details |
| Calc | calcium | | | | Details |
| Calc | calculate(ed), calculation | | | | Details |
| calc | gr calcium-base grease | | | | Details |
| CALD | Caliper interpreted from Density | | | | Details |
| cale | calceneous | | | | Details |
| CALI | Caliper Log | | | | Details |
| CALI | Generalized Caliper | | | | Details |
| CALI | General Caliper | | | | Details |
| CALIBR | calibrate, calibration | | | | Details |
| CALIL | Caliper Log | | | | Details |
| CALOG | Circumferential Acoustic Log | | | | Details |
| CALP | Caliper | | | | Details |
| CALTEX | Various affiliates of Texaco Inc, and Chevron Corp. partnership — | | | | Details |
| Calv | Calvin | | | | Details |
| CALVE | Calibrated Velocity Log Data | | | | Details |
| CAM | Contract Accountable Manager | | | | Details |
| Camb | cambrian | | | | Details |
| CAMEL | Companie Algerienne du Methane Liquide France/Algeria | | | | Details |
| CAMPSA | Compania Arrendataria del Monopolio de Petroleos, S.A. (sub. of Repsol) Spain | | | | Details |
| CAMS | Competence Assurance Management System | | | | Details |
| CAN | CANADA | | | | Details |
| Cane | Riv Cane River | | | | Details |
| CANL | Computer Analysis | | | | Details |
| CanOxy | Canadian Occidental Petroleum Ltd. | | | | Details |
| Cany | canyon | | | | Details |
| CAO | Computer Aided Operations | | | | Details |
| CaO | calcium oxcide | | | | Details |
| CAODC | Canadian Association of Oilwell Drilling Contractors | | | | Details |
| CAODS | Canadian Association of Oilwell Drilling Contractors | | | | Details |
| CAOF | calculated absolute open flow A theoretical figure of a wells maximum production | | | | Details |
| CAOF | calculated absolute open flow | | | | Details |
| CAP | Casing Annulus Packer | | | | Details |
| CAP | Central Asia Petroleum | | | | Details |
| CAP | Condition Assessment Programme | | | | Details |
| Cap | Capacity | | | | Details |
| CAP | EX Capital expenditure | | | | Details |
| cap | capacitor | | | | Details |
| Cap | Captain | | | | Details |
| CAPAG | Entreprise Moderne de Canalisations Petrolieres, Aquiferes et Gasieres France | | | | Details |
| CAPEX | Capital Expenditure | | | | Details |
| CAPP | Canadian Association of Petroleum Producers | | | | Details |
| CAPP | Canadian Association of Petroleum Producers | | | | Details |
| CAR | Company Appointed Representative | | | | Details |
| CAR | Corrective Action Request | | | | Details |
| CAR | Corporate Activity Report | | | | Details |
| Car | Carlile | | | | Details |
| carb | carbonaceous | | | | Details |
| carb | test carbontetrachloride | | | | Details |
| CARBESA | Carbon Black Espanola S.A. Spain | | | | Details |
| Carm | Carmel | | | | Details |
| CART | Cam Actuated Running Tool (Housing Running Tool) | | | | Details |
| CART | Cap Replacement Tool | | | | Details |
| CAS | Casing Log | | | | Details |
| CAS | Casing Run | | | | Details |
| CAS | Chemical Abstracts Service (see comment) | | | | Details |
| CAS | Condition Assessment Scheme | | | | Details |
| CAS | Chemical Abstracts Service | | | | Details |
| CAS | Chemical Abstract Service | | | | Details |
| CASE | Computer-aided Software Engineering | | | | Details |
| Casing) | (Thru | | | | Details |
| CASL | Computer Acoustic | | | | Details |
| CaSO4 | calcium sulfate | | | | Details |
| Casoc | California Arabian Standard Oil Company | | | | Details |
| Casp | Casper | | | | Details |
| CAST | Circumfrential Accoustic Tool (HES) | | | | Details |
| CAST | Circumferential Acoustic Scanning | | | | Details |
| CAT | computer-aided tomography | | | | Details |
| CAT | carburetor air temperature | | | | Details |
| Cat | Catahoula | | | | Details |
| CAT | catalog | | | | Details |
| CAT | catalyst, catalytic | | | | Details |
| cat | ckr catalytic cracker | | | | Details |
| Cat | Crk Cat Creek | | | | Details |
| CATe | Core Asset Team | | | | Details |
| cath | cathodic | | | | Details |
| CATR | Clean Air Transportation Rule | | | | Details |
| CATS | Cableless Telemetry System | | | | Details |
| CATT | Capabilities & Technology Team | | | | Details |
| caus | caustic | | | | Details |
| cav | cavity | | | | Details |
| CAVL | Compensated Acoustic Velocity | | | | Details |
| CAW | Completions and Workovers | | | | Details |
| CBA | Commercial Bid Assessment | | | | Details |
| CCA | Conventional Core Analysis | | | | Details |
| CCA | Cut Casing | | | | Details |
| C-Cal | contact caliper | | | | Details |
| CCEA | Cabinet Committee on Economic Affairs | | | | Details |
| CDAT | Calibration Date | | | | Details |
| CDATA | Core Data | | | | Details |
| CDL/CAL | Compensated Densilog Caliper | | | | Details |
| CDL/CAL/ | Compensated Densilog Caliper | | | | Details |
| CDL/CAL/GR | Compensated Densilog Caliper | | | | Details |
| CDL/CAL/GR | Densilog Caliber Gamma Ray Log | | | | Details |
| CDL/CAL/ML | Compensated Densilog Caliper Minilog | | | | Details |
| ce Ta | Center Tank | | | | Details |
| CECAN | CEC Analysis | | | | Details |
| CEDIPSA | Compania Espanola Distribuidora de Petroleos S.A. Spain | | | | Details |
| CentGas | Central Asia Gas Pipeline Ltd. | | | | Details |
| CEPA | Canadian Energy Pipeline Association | | | | Details |
| Cepsa | Compania Espanola de Petroleos | | | | Details |
| CEPSA | Compania Espanola de Petroleos, S.A. Spain | | | | Details |
| CEQA | California Environmental Quality Act | | | | Details |
| CERA | Cambridge Energy Research Associates | | | | Details |
| CERCLA | a US Law – Comprehensive Environmental Response, Compensation and Liability Act of 1980 | | | | Details |
| CERCLA | Comprehensive Environmental Response, Compensation, and Liability Act (The Superfund Law) | | | | Details |
| CFA | Compositional Fluid Analizer | | | | Details |
| CGA | Canadian Gas Association | | | | Details |
| CGA | Clean Gulf Associates | | | | Details |
| CgASR | Coated-Grain, Algal, Skeletal Rudstone-Floatstone | | | | Details |
| chal | chalcedony | | | | Details |
| CHAM | chamfer | | | | Details |
| Chapp | Chappel | | | | Details |
| CHAR | characteristics | | | | Details |
| Char | Charles | | | | Details |
| Chatt | Chattanooga shale | | | | Details |
| chromat | chromatograph | | | | Details |
| CIA | Concentration In Air | | | | Details |
| CIEPSA | Compania de Investigacion y Exploraciones Petroliferas, S.A. Spain | | | | Details |
| Cima | Cimarron | | | | Details |
| CINSA | Compania Insular del Nitrogena, S.A. Spain | | | | Details |
| CIPA | California Independent Petroleum Association | | | | Details |
| CIT-OA | casing integrity test – outside annulus | | | | Details |
| CKTA | Central Kazakhstan Territorial Administration for Natural Resource Protection Kazakhstan | | | | Details |
| CLA | Collective Labor Agreement | | | | Details |
| Clag | Clagget | | | | Details |
| Claib | Claiborne | | | | Details |
| Clarks | Clarksville | | | | Details |
| clas | clastic | | | | Details |
| CLAS | Clay Analysis and Shaly Sand Evaluation (CLASS®) | | | | Details |
| CLASS | classification | | | | Details |
| Clav | Clavalinoides | | | | Details |
| Clay | a fine grain (<000015” or about 4 microns) – finely crystalline silica sheet minerals Usually of silicate composition In oil field terms, the most common clays are Smectite (montmorillinite), illite, kaolinite and chlorite The characteristic for authogenic clay is to have extremely high surface area-to-volume ratio | | | | Details |
| Clay | Clayton | | | | Details |
| Clay | Claytonville | | | | Details |
| CLAY | Clay Description (CLAYS) | | | | Details |
| CMA | Capital Markets Authority | | | | Details |
| CMA | acoustic caliper | | | | Details |
| CMPARTR | comparator | | | | Details |
| CNACG | China National Administration of Coal Geology China | | | | Details |
| CNT-A/H | Compensated Neutron Log | | | | Details |
| COA | Contract Of Affreightment | | | | Details |
| CoA | Chart of Accounts | | | | Details |
| COACP | Contract Of Affreightment Charter Party | | | | Details |
| Coal | sedimentary rock, often highly naturally fractured, composed of thermally modified plant remains | | | | Details |
| CODESSAS | Cia. Operadora de Estaciones de Servicio S.A. de CV Mexico | | | | Details |
| COFCAW | a tertiary recovery mechanist consisting of combustion and water flooding | | | | Details |
| COGA | Colorado Oil & Gas Association | | | | Details |
| COGSA | Carriage of Goods by Sea Act | | | | Details |
| Com AVL | Compensated Acoustic Velocity Log | | | | Details |
| Com AVL-G | Compensated Acoustic Velocity | | | | Details |
| Com AVL-N | Compensated Acoustic Velocity | | | | Details |
| COMAN | Compositional Analysis | | | | Details |
| COMESA | Cie. Mexicana de Exploraciones S.A. Mexico | | | | Details |
| COMGAS | Companhia de Gas de Sao Paolo Brazil | | | | Details |
| CONCAWE | Conservation of Clean Air and Water in Europe | | | | Details |
| CONCAWE | Oil companies’ European organization for environment, health and safety Belgium | | | | Details |
| CONSPAIN | Continental Oil Co. of Spain (Conoco Espanola, S.A.) Spain | | | | Details |
| contam | contaminated, contamination | | | | Details |
| COPAREX | Companie de Participations, de Recherches et d’Exploitations Petrolieres France | | | | Details |
| COPAS | Council of Petroleum Accountants Society | | | | Details |
| CORAN | Core Analysis Report | | | | Details |
| COSA | Crude Oil Sales Agreement | | | | Details |
| COVA | Netherlands National Petroleum Stockpiling Agency (Stichting Centraal Orgaan Voorraadvorming Aardolieprodukten) Netherlands | | | | Details |
| CPA | Cost per action | | | | Details |
| CPA | Cubic Plus Association | | | | Details |
| CPA | certified public accountant | | | | Details |
| CPA | Canadian Petroleum Association | | | | Details |
| CPAs | Citizen's Proposal Areas | | | | Details |
| CPEMA | Concurrent Production Eng Maintenance Activities | | | | Details |
| CPIA | Cathodic Protection Industry Association | | | | Details |
| CPRA | Concurrent Production & Rig Activities (SIMOPS) | | | | Details |
| CRA | Corrosion Resistant Alloy (material) | | | | Details |
| CRA | Change Rams | | | | Details |
| CRA | Corrosive Resistive Alloy | | | | Details |
| CRA | corrosion resistant alloy | | | | Details |
| CRA | cased reservoir analysis | | | | Details |
| CRA | chemically retarded acid | | | | Details |
| CRA | Complex Reservoir Analysis | | | | Details |
| CSA | Canadian Standard Association Approval (see comment) | | | | Details |
| CSA | casing set at | | | | Details |
| CSAP | Cake Saver Acid Placement (Baker gravel pack tool) | | | | Details |
| CS-AP | Cake Saver Acid Placement (Baker gravel pack tool) | | | | Details |
| CSIA | Compound Specific Isotope Analysis | | | | Details |
| CSTAK | Core Sample Taken Log | | | | Details |
| CTRAC | Cement Tracer Log | | | | Details |
| Cut Oil Act | cutting oil active-sulfurized-dark | | | | Details |
| Cut Oil Act | cutting oil active-sulfurized-transparent | | | | Details |
| cuvar | clean up on various choke sizes | | | | Details |
| CVAFS | Cold vapour atomic fluorescence spectroscopy | | | | Details |
| CWA | clean water act, a US law | | | | Details |
| CWA | Clean Water Act | | | | Details |
| CWA | Clean Water Act | | | | Details |
| CWAV | cost-weighted average volume | | | | Details |
| CZMA | Coastal Zone Management Act | | | | Details |
| D & A | dry and abandoned | | | | Details |
| D&A | dry and abandoned | | | | Details |
| D&A | dry & abandoned | | | | Details |
| D/A | Disbursement Account | | | | Details |
| D/A | Drill Ahead | | | | Details |
| d/b/a | doing business as | | | | Details |
| DA | Data Aquisition | | | | Details |
| DA | Drill Ahead | | | | Details |
| DA | BENIN | | | | Details |
| DA | DENMARK | | | | Details |
| DA | BENIN | | | | Details |
| DA | Development Area | | | | Details |
| DA | daily allowable | | | | Details |
| DA | Dresser Atlas | | | | Details |
| DA | drift angle | | | | Details |
| DAB | Decision Advisory Board | | | | Details |
| DAC | Dipole Acoustic Log | | | | Details |
| DAC | Digital to Analog Converter | | | | Details |
| DAC | Digital Array Acoustilog | | | | Details |
| DAC | Digital-To-Analog Converter | | | | Details |
| DAC | Digital Array Acousticlog sm | | | | Details |
| DACA | Data Aquisition & Control Architecture (Smart) | | | | Details |
| DACC | Drilling and Completions Committee | | | | Details |
| DAF | Delivered At Frontier | | | | Details |
| DAFW | Days Away Form Work | | | | Details |
| DAFWC | Days Away From Work Case | | | | Details |
| DAIB | daily average injection barrels | | | | Details |
| Dak | Dakota | | | | Details |
| DAL | Digital Acoustilog | | | | Details |
| Dan | Dantzler | | | | Details |
| DANA | Dana Petroleum plc UK | | | | Details |
| DANOP | Dansk Operatorselskab Denmark | | | | Details |
| DAP | Days All Purposes (Total days for loading and disch.) | | | | Details |
| DAPC | Dynamic Annular Pressure Control | | | | Details |
| DAPM | Downhole Annular Pressure Measurement | | | | Details |
| DAR | Digital Acoustic Tool | | | | Details |
| Dar | Darwin | | | | Details |
| DAR | discovery allowable requested darcy | | | | Details |
| DARC | Permeability Estimation | | | | Details |
| DARCI | Darci Log | | | | Details |
| DART | Data Acquisition, Reporting, and Transmission Tool | | | | Details |
| DART | Days Away/Restricted or Transfer Rate (see comment) | | | | Details |
| DAS | Data Acquisition System | | | | Details |
| DAT | Wellhead Housing Drill-Ahead Tool | | | | Details |
| dat | datum | | | | Details |
| DAZD | Dip and Azimuth Display | | | | Details |
| DBA | Database Administrator | | | | Details |
| dba | doing business as | | | | Details |
| DBA | depth bracket allowable | | | | Details |
| DCA | Development Contract Area | | | | Details |
| DCAF | Discipline Controls & Assurance Framework | | | | Details |
| DCAL | Differential Caliper Log | | | | Details |
| DCAL | dual caliper log | | | | Details |
| DCALI | Dual Caliper Log | | | | Details |
| DD&A | depletion depreciation and amortization | | | | Details |
| DDGAS | South Transdanubian Gas Co. Germany | | | | Details |
| DEA | Drilling Engineering Association | | | | Details |
| DEA | diethanolamine | | | | Details |
| DEA | unit diethanolamine unit | | | | Details |
| DEA | Deutsche Erdol Aktiengesselschaft (see REW-DEA) Germany | | | | Details |
| Deadw | Deadwood | | | | Details |
| deaer | deaerator | | | | Details |
| deasph | deasphalting | | | | Details |
| Dela | Delaware | | | | Details |
| DELTA | Delta- Tlog | | | | Details |
| DEPA | Greek State Natural Gas Company Greece | | | | Details |
| DEPAN | Deposit Analysis Report | | | | Details |
| DERPROSA | Derivados del Propileno S.A. Spain | | | | Details |
| desalt | deslater | | | | Details |
| DEUDAN | Deutsche/Danische Erdgastransport GmbH Germany/Denmark | | | | Details |
| DEUTAG | Deutsche Tiefbohr-AG Germany | | | | Details |
| dewax | dewaxing | | | | Details |
| DFA | Downhole Fluid Analysis | | | | Details |
| DFA | Dynamic Flow Analysis | | | | Details |
| DFE (ACD) | Drill Floor Elevation (Admiralty Chart Datum) | | | | Details |
| DGA | diglycolamine | | | | Details |
| DGAS | Deep Gas Conference and Exhibition | | | | Details |
| DGCA | Directorate General of Civil Aviation | | | | Details |
| DG-Packer | Double Grip Packer | | | | Details |
| DHDATSBE | Despatch Half Demurrage on All Time Saved Both Ends | | | | Details |
| dia | diameter | | | | Details |
| diag | diagonal | | | | Details |
| diag | diagram | | | | Details |
| DIAH | Down In A hole | | | | Details |
| DIAL | Differential Absorption Light Detection and Ranging | | | | Details |
| DIAL | Dia-Log | | | | Details |
| diaph | diaphragm | | | | Details |
| diat | diatomite | | | | Details |
| DIGANAMEX | Distribuidora de Gas Natural del Estado de Mexico S.A. Mexico | | | | Details |
| DIGAQRO | Distribuidora de Gas de Queretaro S.A. Mexico | | | | Details |
| DIMAH | Direction des Matieres Premiers et des Hydrocarbures France | | | | Details |
| DIPA | diisopropanolamine | | | | Details |
| DIPAR | Dipole Acoustic Report | | | | Details |
| DIPSA | Dipmeter Soda Log | | | | Details |
| disman | dismantle | | | | Details |
| DISPESA | Compania Distribuidora de Productos Petroliferos S.A. Spain | | | | Details |
| DITAS | TPAO Marine Tanker Subsidiary Turkey | | | | Details |
| DLA | Development Lease Area | | | | Details |
| DMA | Dead Man Anchor | | | | Details |
| DMA | DOMINICA | | | | Details |
| DMAG | Digital Magnelog | | | | Details |
| DOA | delegation of authority | | | | Details |
| DOAMS | Digital OilField and Asset Management System | | | | Details |
| DPTA | diaminopropanoltetraacetic acid, a calcium scale remover and solvent | | | | Details |
| DRAM | Dynamic Random Access Memory | | | | Details |
| DRAPR | Delaware River Area Petroleum Refineries | | | | Details |
| DRBA | Delaware River Basin Authority | | | | Details |
| DSA | Double Stud Adaptor | | | | Details |
| DSA | Downhole Seismic Array | | | | Details |
| DSA-A | Downhole Seismic Array | | | | Details |
| DSCAN | DSC Analysis Report | | | | Details |
| DTA | Decision Tree Analysis | | | | Details |
| DTA | Drehtischantrieb | Rotary table | | | Details |
| Dubal | Dubai Aluminium Company | | | | Details |
| Dugas | Dubai Natural Gas Company | | | | Details |
| DWA | drilling with air | | | | Details |
| DWLA | DST LINC* WireLine Adapter (* mark of SLB ) - UPP versatility | | | | Details |
| DZA | ALGERIA | | | | Details |
| E&A | Exploration and Appraisal | | | | Details |
| EA | Exploration Asset | | | | Details |
| EA | Environmental Assessment | | | | Details |
| ea | each | | | | Details |
| EAB | Egyptian American Bank | | | | Details |
| EAF | Employee Assessment Form | | | | Details |
| EAGC | European Autumn Gas Conference | | | | Details |
| EAGE | European Association of Geoscientists & Engineers | | | | Details |
| EAGE | European Assn. of Geoscientists & Engineers Netherlands | | | | Details |
| EAM | electric accounting machines | | | | Details |
| EAN | European Article Number | | | | Details |
| EAOC | Exxon Azerbaijan Operating Company | | | | Details |
| Earls | Earlsboro | | | | Details |
| Eau | Clr Eau Claire | | | | Details |
| EBITDA | earnings before interest, tax, depreciation and amortization | | | | Details |
| ECA | Export Credit Agency | | | | Details |
| E-cat | equilibrium catalyst | | | | Details |
| ECATWW-L | Wireline department in GAE | | | | Details |
| ECUWAS | Economic Cummunity of West African States | | | | Details |
| EDA | Exploratory Data Analysis | | | | Details |
| EDTA | Ethylene Diamine Tetraacetic Acid | | | | Details |
| EDTA | ethylene diamene tetra acetic acid | | | | Details |
| EEA | Egyptian Electricity Authority | | | | Details |
| EEBA | Emergency Escape Breathing Apparatus | | | | Details |
| EEMUA | Engineering Equipment & Materials Users Assn. UK | | | | Details |
| EEPAL | Exxon Exploration and Production Azerbaijan Limited | | | | Details |
| EFTA | European Free Trade Association | | | | Details |
| EGSMA | Egyptian Geological Survey & Mining Authority Egypt | | | | Details |
| EGTA | Etudes et Grands Travaux de l’Atlantique France | | | | Details |
| EgyptAlum | Egypt Aluminium | | | | Details |
| EIA | Environmental Impact Assessment | | | | Details |
| EIA | Energy Information Agency | | | | Details |
| EIA | Energy Information Administration | | | | Details |
| EIA | Energy Information Administration, division of US Department of Energy | | | | Details |
| EIA | U.S. Energy Information Administration | | | | Details |
| EIA | environmental assessment | | | | Details |
| EISA | Egyptian Insurance Supervisory Authority | | | | Details |
| EIVAL | Sociedad de Empreendimentos, Investimentos e Armazenagem de Gases S.A. Portugual | | | | Details |
| EKTA | East Kazakhstan Territorial Administration for Natural Resource Protection Kazakhstan | | | | Details |
| ELAN | Elemental Analysis program (SLB) | | | | Details |
| Elec/MAG | electromagnetic | | | | Details |
| EMAGEO | Entreprise Nationale de Geophysique Algeria | | | | Details |
| EMALCO | Empresa Almacenadora de Combustibles Ltda. Chile | | | | Details |
| EMARAT | Emirates General Petroleum Corp. UAE | | | | Details |
| EMAS | Eco-Management and Audit Scheme | | | | Details |
| ENACOL | Empresa Nacionale de Combustiveis, SARL Cape Verde | | | | Details |
| ENAFOR | Entreprise Nationale de Forage Algeria | | | | Details |
| ENAGAS | Empresa Nacional del Gas S.A. Spain | | | | Details |
| ENAP | Empresa Nacional del Petroleo Chile | | | | Details |
| ENFERSA | Empresa Nationale de Fertiliantes S.A. Spain | | | | Details |
| ENGEBRAS | Engenharia Especializada Brasileira, S.A. Brazil | | | | Details |
| ENIAC | Electronic Numerical Integrator And Computer | | | | Details |
| EOA | End Of Assembly (Completion) | | | | Details |
| EONIA | Euro OverNight Index Average | | | | Details |
| EPA | Exploration & Production - Asia | | | | Details |
| EPA | The USA Environmental Protection Agency | | | | Details |
| EPA | Environmental Protection Agency, US pollution control enforcer | | | | Details |
| EPA | U.S. Environmental Protection Agency | | | | Details |
| EPA | Environmental Protection Agency | | | | Details |
| EPCA | Energy Policy and Conservation Act of 2000 | | | | Details |
| EPCA | Energy Policy and Conservation Act | | | | Details |
| EPCRA | Emergency Planning and Community Right-to-Know Act | | | | Details |
| EPCRA | Emergency Planning and Community Right –To-Know Act ( Title III of SARA, commonly called Right-To-Know or SARA Title III) | | | | Details |
| EPSA | Exploration and Production Sharing Agreement | | | | Details |
| ERAP | Entreprise de Recherches et d’Activites Petrolieres France | | | | Details |
| ERWDA | Environmental Research & Wildlife Development Agency (UAE) | | | | Details |
| ESA | Employees Shareholder Association | | | | Details |
| ESA | Romania & Austria | | | | Details |
| ESAF | Enhanced Structural Adjustment Facility | | | | Details |
| ESAR | Estimating & Schedule Assurance Review | | | | Details |
| ESCWA | Economic and Social Commission for West Asia | | | | Details |
| ESHIA | Envinmental Safety Health Impact Assessment | | | | Details |
| ESSAF | Esso Standard Societe Anonyme Francaise France | | | | Details |
| et al | and others | | | | Details |
| ETA | Estimated Time Arrival | | | | Details |
| ETA | Expected Time of Arrival | | | | Details |
| ETA | estimated time of arrival | | | | Details |
| etal | et al. (and others) | | | | Details |
| ETAP | Eastern Trough Area Project | | | | Details |
| ETAP | Entreprise Tunisienne d’Activités Petrolières | | | | Details |
| ETAP | Entreprise Tunisienne d’Activites Petrolieres Tunisia | | | | Details |
| EURAFRAP | EURAFRAP Nederland B.V. (and others) Netherlands | | | | Details |
| EURAFREP | Societe de Recherches et d’Exploitation de Petrole France | | | | Details |
| EUROGAS | European Union of the Natural Gas Industry Belgium | | | | Details |
| EUROPIA | European Petroleum Industry Assn. | | | | Details |
| eval | evaluate | | | | Details |
| evap | evaporation, evaporate | | | | Details |
| EVARE | Evaluation Report | | | | Details |
| EWA | Energy Waveform Analysis | | | | Details |
| EXAM | Examination | | | | Details |
| EXPEC-ARC | Exploration and Petroleum Engineering Center’s Advanced Research Center | | | | Details |
| extrac | extraction | | | | Details |
| F/DIA | flow diagram | | | | Details |
| F/FAB | field fabricated | | | | Details |
| f’man | foreman | | | | Details |
| FA | Flow Assurance | | | | Details |
| FA | Free Alongside | | | | Details |
| FA | FALKLAND ISLANDS (MALVINAS) | | | | Details |
| fa | Firma (company) | | | | Details |
| FAA | Federal Aviation Agency | | | | Details |
| fab | fabricate(ed)(tion) | | | | Details |
| FAB | faint air blow | | | | Details |
| FAC | Factual Report | | | | Details |
| FAC | First Aid Case (see comment) | | | | Details |
| FAC | Fast As Can | | | | Details |
| fac | facet(ed) | | | | Details |
| FACHV | Four Arm Caliper Log | | | | Details |
| FACIL | facility(ies) | | | | Details |
| FACO | field authorized to commence operations | | | | Details |
| FAE | Förderart Ergänzung Stelle | | | | Details |
| FAF | Flow After Flow test | | | | Details |
| FAFR | Fatal Accident Frequency Rate | | | | Details |
| FAIFR | first aid injury frequency rate | | | | Details |
| fail | failure | | | | Details |
| fain | faint | | | | Details |
| fair | fair | | | | Details |
| FAL | Analysis Formation | | | | Details |
| FAL | Formation Analysis | | | | Details |
| FAL | Rwa Logging | | | | Details |
| Fall | Riv Fall River | | | | Details |
| FANAL | Formation Analysis Sheet Log | | | | Details |
| FAO | finish all over | | | | Details |
| FAP | Form A Plug | | | | Details |
| FAR | Fatal Accident Rate | | | | Details |
| Farm | Farmington | | | | Details |
| FARO | flow at rate of | | | | Details |
| FARO | flowed(ing) at the rate of | | | | Details |
| FAS | Free Alongside Ship | | | | Details |
| FASC | Fullbore Annular Sample Chamber | | | | Details |
| FAT | Fatality (number of fatality - see comment) | | | | Details |
| FAT | Factory Acceptance Test (see comment) | | | | Details |
| fau | fauna | | | | Details |
| Fault | where rock splits or ruptures with associated movement occurs on either side | | | | Details |
| FCA | Free CArrier | | | | Details |
| FCAL | Single Axis Caliper | | | | Details |
| F-DIA | flow diagram | | | | Details |
| FDNAT | Frequency-Dependent Noise Attenuation (CGGVeritas) | | | | Details |
| FEA | Federal Environmental Agency (Authority) | | | | Details |
| FEAST | Fluid Evaluation And Sampling Technologies | | | | Details |
| FELA | Federal Employers Liability Act | | | | Details |
| FESA | Front End Studies Americas | | | | Details |
| FFA | female to female angle | | | | Details |
| FFA | full freight allowed(purchasing term) | | | | Details |
| FFAC | Formation Factor Log | | | | Details |
| FIAC | Four Independent Arm Caliper | | | | Details |
| FIFRA | Federal Insecticide, Fungicide, and Rodenticide Act | | | | Details |
| FIGAZ | Federation de l‘Industrie du Petrole France | | | | Details |
| FINA | PetroFina S.A. (now TotalFinaElf) Belgium | | | | Details |
| FLA | Four Letter Acronyms | | | | Details |
| FLA | Ferry Lake anhydrite | | | | Details |
| FLAP | fluid level above pump | | | | Details |
| flat | flattened | | | | Details |
| Flath | Flathead | | | | Details |
| FLRA | Field Level Risk Assessment | | | | Details |
| FLUORAZ | a high performance elastomer for seal assemblies | | | | Details |
| FMEA | failure modes, & effects analysis | | | | Details |
| FMEA | Failure Modes and Effects Analysis | | | | Details |
| FMEA | failure mode and effects analysis | | | | Details |
| FMECA | Failure Modes, Effects, and Criticality Analysis | | | | Details |
| FMECA | failure mode and criticality effects analysis | | | | Details |
| FMTAN | FMT Analysis Report | | | | Details |
| Forak | Foraker | | | | Details |
| Foram | foraminifera | | | | Details |
| formation | evaluation | | | | Details |
| FORTRAN | Formula Translation | | | | Details |
| FPA | Floc Point Analyzer | | | | Details |
| FPLAN | Field Plan Log | | | | Details |
| Fr. wa. | Fresh water | | | | Details |
| FRA | Fracture Log | | | | Details |
| FRA | Formation Rate Analysis | | | | Details |
| FRA | FRANCE | | | | Details |
| FRA | formation rate analyser, a well performance test method | | | | Details |
| FRA | friction reducing agent | | | | Details |
| FRAC | Frac Log DIP | | | | Details |
| FRAC L | Frac Log | | | | Details |
| frac(d)(s) | fracture, fractured, fractures | | | | Details |
| frac, fract | fracture, fractured | | | | Details |
| FRAC/GR | Frac Log-Gamma Ray DIP | | | | Details |
| FRAC-GR | Frac Log-Gamma Ray Log | | | | Details |
| fract | fractionation, fractionator, fractional | | | | Details |
| frag | fragment, fragmental | | | | Details |
| frag | fragment | | | | Details |
| fran | franchise | | | | Details |
| Franc | Franconia | | | | Details |
| FRANCAREP | Compagnie Franco-Afrique de Recherches Petrolieres France | | | | Details |
| FRARE | Fracture Report | | | | Details |
| FRFavg | The harmonic mean of the calculated directionally dependent FRFs | | | | Details |
| FSIWA | Federation of Sewage and Industrial Wastes Assn. | | | | Details |
| FTA | Flow Termination Assembly | | | | Details |
| FTA | Free Trade Agreement | | | | Details |
| FTA | Fault Tree Analysis | | | | Details |
| FUA | Fields under appraisal | | | | Details |
| FWAD | Fresh water Arrival Draft | | | | Details |
| FWPCA | Federal Water Pollution Control Act | | | | Details |
| G & A | General and Administration | | | | Details |
| G&A | General & Administration | | | | Details |
| GA | General Arrangement plumbing drawings | | | | Details |
| GA | Gasanker | | | | Details |
| GA | General Average | | | | Details |
| GA | GAMBIA | | | | Details |
| GA | GABON | | | | Details |
| GA | Georgia GU - Guam | | | | Details |
| ga | gauge(ed)(ing) | | | | Details |
| GA | gallons acid | | | | Details |
| GA | general agreement | | | | Details |
| GAB | GABON | | | | Details |
| GAF | gross acre-feet | | | | Details |
| GAGD | Gas Assisted Gravity Drainage | | | | Details |
| GAIC | Gulf Arab Investment Company | | | | Details |
| GAIGI | Gravity Assisted Inert Gas Injection | | | | Details |
| GAIL | Gas Authority of India Ltd. | | | | Details |
| GAIL | Gail (India) Limited | | | | Details |
| GAIL | Gas Authority India | | | | Details |
| gal | gallon(s) | | | | Details |
| gal | sol gallons of solution | | | | Details |
| gal/day | gallons per day | | | | Details |
| gal/Mcf | gallons per thousand cubic feet | | | | Details |
| gal/min | gallons per minute | | | | Details |
| gal/yr | gallons per year | | | | Details |
| Gall | Gallatin | | | | Details |
| GALUK | Gallon (UK) | | | | Details |
| galv | galvanized | | | | Details |
| GAM | Gamma Ray Sonde | | | | Details |
| GAMA | Gas Appliance Manufacturers Association | | | | Details |
| GAOCMAO | Gulf Area Oil Companies Mutual Aid Organization (—) | | | | Details |
| GAP | Gravity Actuated Pipe/Pipeline | | | | Details |
| GAPI | Gamma Ray using API units | | | | Details |
| GAPPCO | Gas Processing and Pipeline Company | | | | Details |
| GAPTM | general allocation program | | | | Details |
| GAS | Gas Log | | | | Details |
| GAS | National Industrial Gases Company | | | | Details |
| GAS | Gas Storage Pipe Evaluation | | | | Details |
| GASAN | Gas Analysis Report | | | | Details |
| GASBEND | Good And Safe (Port) Both ENDs | | | | Details |
| Gasco | Gas Industries Company | | | | Details |
| GASCO | Abu Dhabi Gas Industries Ltd | | | | Details |
| GASCO | Abu Dhabi Gas Industries Ltd. Abu Dhabi | | | | Details |
| GASCO | Egyptian Natural Gas Co. Egypt | | | | Details |
| gas-cut | salt water | | | | Details |
| GASD | Gas Detection | | | | Details |
| gaso | gasoline | | | | Details |
| gast | gastropod | | | | Details |
| GASUNIE | NV Nederlandse Gasunie Netherlands | | | | Details |
| GAT | Geohazard Assessment Team | | | | Details |
| GATOIL | Subsidiary of NOC Libya Libya | | | | Details |
| GAZPROM | RAO Gazprom (former USSR Ministry of Gas Production) Russia | | | | Details |
| GBDA | gallons breakdown acid | | | | Details |
| GCAA | General Civil Aviation Authority (UAE) | | | | Details |
| Gcal | gigacalorie | | | | Details |
| g-cal | gram calorie | | | | Details |
| GCAW | gas cut acid water | | | | Details |
| GCAW | gas-cut acid water | | | | Details |
| GCPA | gas cap participating area | | | | Details |
| GDAT | Geodetic Datum | | | | Details |
| GeoTap | GeoTap Formation Tester | | | | Details |
| GFA | Formation Tester Gamma Ray Detector | | | | Details |
| GFAAS | graphite furnace atomic absorption spectrometry | | | | Details |
| GHA | GHANA | | | | Details |
| GHAIP | Ghanaian-Italian Petroleum Co., Ltd. Ghana | | | | Details |
| GLADTM | software package, gas lift assisted design | | | | Details |
| glau | glauconite, glauconitic | | | | Details |
| glauc | glauconitic | | | | Details |
| glna | Galena | | | | Details |
| GMA | gallons mud acid | | | | Details |
| gm-cal | gram-calorie | | | | Details |
| GPA | Goals & Performance Appraisal (Shell HR form) | | | | Details |
| GPA | Gas Processors Assocation | | | | Details |
| GPA | Gas Purchase Agreement | | | | Details |
| GPA | EUROPE Gas Processors Assn. – Europe (—) | | | | Details |
| GR/CALD | Gamma Ray/Dual Caliper | | | | Details |
| GR/D CALIPER | Gamma Ray/Dual Caliper | | | | Details |
| GRA | Geochemical Reservoir Analyzer | | | | Details |
| GRA | gallons regular acid | | | | Details |
| GRAD | Gradiometer Log | | | | Details |
| GRAD | gradiomanometer | | | | Details |
| grad | gradual, gradually | | | | Details |
| gran | granular | | | | Details |
| gran | granite, granular | | | | Details |
| gran | w granite wash | | | | Details |
| granny rag | Type of coating or method of coating a pipeline in the field rather than factory applied coating | | | | Details |
| Granos | Graneros | | | | Details |
| grap | graptolite | | | | Details |
| grav | gravity | | | | Details |
| GRAV | Gravity | | | | Details |
| GRAY | Gnnity | | | | Details |
| Gray | Grayson | | | | Details |
| Grayb | Grayburg | | | | Details |
| GSA | Gas Sales Agreement | | | | Details |
| GSA | General Service Agreement | | | | Details |
| GTAU | Gas Turbine Auxiliary Unit | | | | Details |
| HA | HAtch | | | | Details |
| HA | HAITI | | | | Details |
| Hackb | Hackberry | | | | Details |
| HADR | High Temperature Azimuthal Gamma Ray | | | | Details |
| HAGR | High Temperature Azimuthal Gamma Ray | | | | Details |
| HAI | Hydro Agri International | | | | Details |
| HAL | Halite | | | | Details |
| HAL | HALLIBURTON LOG SERVICE | | | | Details |
| HALS | High Resolution Azimuthal Laterlog Sonde | | | | Details |
| HALS | High Resolution Array Lithology Sonde. | | | | Details |
| HAM | Hydraulic Actuator Modul | | | | Details |
| HAP | hazardous Air Pollutant | | | | Details |
| HAP | hazardous air pollutants | | | | Details |
| HAPS | HPHT Accelator Porosity Sonde (aka XAPS) | | | | Details |
| HAR | Hazard Analysis Review | | | | Details |
| HAR | Hellenic Aspropyrgas Refinery Greece | | | | Details |
| Hara | Haragan | | | | Details |
| HARC | Hazard Analysis & Risk Control | | | | Details |
| Hask | Haskell | | | | Details |
| Hatch | the opening on a tank | | | | Details |
| Haynes | Haynesville | | | | Details |
| HAZ | Hazard | | | | Details |
| HAZ | Heat-Affected Zone | | | | Details |
| HAZ | Heat Affected Zone | | | | Details |
| HAZ | heat affected zone The area around a weld or other area in the steel that has been modified by heat and, as a result, is more subject to some forms of corrosion | | | | Details |
| haz | hazardous | | | | Details |
| HAZID | Hazard Identification (meeting) | | | | Details |
| HAZIO | Hazard and Operability Analysis | | | | Details |
| HAZOP | Hazardous Operation | | | | Details |
| HAZOP | hazardous operations | | | | Details |
| HBA | Honors Business Administration | | | | Details |
| HBA | Steigrohrhänger mit Dichtelementen (wird ausschliesslich bei Gassonden verwendet) | | | | Details |
| HCAL | HRCC Calliper (in Logs)(in Inches) | | | | Details |
| HDA | Helideck Assistant | | | | Details |
| HDIL_BA | High-Definition Induction Log | | | | Details |
| HDIL_HAL | Hostile Dual Induction | | | | Details |
| HIA | Health Information Act | | | | Details |
| HIA | Hydrologic Investigations Atlas | | | | Details |
| HIRA | Hazard Identification and Risk Assessment | | | | Details |
| HISPANOIL | Hispanica de Petroleos, S.A. (see Repsol) Spain | | | | Details |
| Hmax | Maximum Wave Height | | | | Details |
| HMTA | Hazardous Materials Transportation Act | | | | Details |
| holiday | Hole in the protective coating of a steel pipeline in the field | | | | Details |
| HPAM | hydrolyzed polyacrylamide | | | | Details |
| HPGAG | High Pressure Gauge | | | | Details |
| HRA | Health Risk Assessment | | | | Details |
| HRAL | High resolution Array Laterolog | | | | Details |
| HRLA | High-Resolution Laterolog Array Tool | | | | Details |
| HSA | Hydrocarbon Sale Agreement | | | | Details |
| HSWA | Hazardous and solid Waste Amendments (1984 RCRA Amendments) | | | | Details |
| HTA | heat-treated alloy | | | | Details |
| HVAC | Heating, Ventilating and Air-Conditioning | | | | Details |
| HVAC | heating ventilating and air conditioning | | | | Details |
| HYDA | Hydril Type A joint | | | | Details |
| HYDCA | Hydril Type CA joint | | | | Details |
| HYLSA | Hojalata y Lamina, S.A. Mexico | | | | Details |
| IA | inner annulus | | | | Details |
| IAB | initial air block | | | | Details |
| IACMAG | International Association of Computer Methods and Geomechanics | | | | Details |
| IACO | International Civil Aviation Organization | | | | Details |
| IADC | International Association of Drilling Contractors | | | | Details |
| IADC | International Association of Drilling Contractors (formerly AAODC) | | | | Details |
| IAE | Institute of Automotive Engineers | | | | Details |
| IAEA | International Atomic Energy Agency | | | | Details |
| IAEE | International Association for Energy Economics | | | | Details |
| IAEE | International Assn. for Energy EconomicsUS | | | | Details |
| IAEO | Iranian Atomic Energy Organization | | | | Details |
| IAG | Integrated Asset Group | | | | Details |
| IAGC | International Association of GeoChemistry | | | | Details |
| IAGC | International Association of Geophysical | | | | Details |
| IAI | Integrity Assurance Index | | | | Details |
| IAM | Integrated Asset Meeting | | | | Details |
| IAM | integrated asset modeling | | | | Details |
| IAOGP | International Association of Oil and Gas Producers | | | | Details |
| IAOM | Integrated Asset Operations Module | | | | Details |
| IAP | inner annulus pressure | | | | Details |
| IAP | Institut Algerien du Petrole Algeria | | | | Details |
| IAPG | Instituto Argentino del Petroleo y del Gas Argentina | | | | Details |
| IARC | Inter Arab Ratings Company | | | | Details |
| IARC | International Agency for Research on Cancer | | | | Details |
| IARF | Infinite-Acting Radial Flow | | | | Details |
| IARFR | Infinite Acting Radial Flow Regime | | | | Details |
| IATA | International Air Transport Association | | | | Details |
| IATEFL | International Association of Teachers of English as Foreign Language | | | | Details |
| IAxOA | inner annulus to outer annulus | | | | Details |
| IBCA | International Banking Credit Agency | | | | Details |
| ICAL | Imaging Caliper | | | | Details |
| ICAO | International Civil Aviation Organization | | | | Details |
| ICAP/MS | inductively coupled argon plasma/mass spectrometry | | | | Details |
| ICIANZ | Imperial Chemical Industries of Australia & New Zealand Ltd. UK | | | | Details |
| ICoTA | Intervention and Coiled Tubing Association | | | | Details |
| ICOTA | International Coiled Tubing Operators Association | | | | Details |
| ICPA | International Cooperative Petroleum Assn. Netherlands | | | | Details |
| IDA | International Development Association | | | | Details |
| IEA | International Energy Agency | | | | Details |
| IEA | International Energy Agency (—) | | | | Details |
| IFA | In-situ Fluid Analyzer | | | | Details |
| IFTA | International Fuel Tax Agreement | | | | Details |
| IGAT | Iranian Gas Trunkline | | | | Details |
| IGSAS | Istanbul Fertiliser Industry Corp. Turkey | | | | Details |
| IGUA | Industrial Gas Users Association | | | | Details |
| IIA | Integrated Impact Assessment | | | | Details |
| ILMA | Independent Lubricant Manufacturers Association | | | | Details |
| ILSA | Iran-Libya Sanctions Act | | | | Details |
| ILTA | Independent Liquid Terminals Association | | | | Details |
| IMA | Internal Multiple Attenuation | | | | Details |
| IMAG | Image Analysis Report | | | | Details |
| IMCA | International Marine Contractors Association | | | | Details |
| IMPA | IMPulse Array Compensated Resistivity | | | | Details |
| INA | Industrija Nafte Croatia | | | | Details |
| Inact | S | | | | Details |
| INGAA | Interstate Natural Gas Association of America | | | | Details |
| INGAA | Independent Natural Gas Association of America | | | | Details |
| Inlam | interlaminated | | | | Details |
| inter-gran | intergranular | | | | Details |
| interlam | inter laminated | | | | Details |
| inter-lam | interlaminated | | | | Details |
| INTERQUISA | Intercontinental Quimica S.A. Spain | | | | Details |
| INTERTANKO | Intl. Assn. of Independent Tanker Owners (—) | | | | Details |
| IOCA | Independent Oil Compounders Association | | | | Details |
| IOGA | Illinois Oil & Gas Association | | | | Details |
| IOGANY | Independent Oil & Gas Association of New York | | | | Details |
| IOGAP | Independent Oil & Gas Association of Pennsylvania | | | | Details |
| IOGAWY | Independent Oil & Gas Association of West Virginia | | | | Details |
| IOOA | Irish Offshore Operators’ Assn. Ireland | | | | Details |
| IOPA | Independent Oil Producers Agency | | | | Details |
| IOSA | International Oil Scouts Association | | | | Details |
| IPA | Independent Project Analysis Company | | | | Details |
| IPA | isopropyl alcohol | | | | Details |
| IPA | initial participating area | | | | Details |
| IPA | Indonesian Petroleum Assn. Indonesia | | | | Details |
| IPAA | Independent Petroleum Association of America | | | | Details |
| IPAC | Independent Petroleum Association of Canada | | | | Details |
| IPCA | International Petroleum Credit Association | | | | Details |
| IPIECA | International Petroleum Industry Environmental Conservation Association | | | | Details |
| IPIECA | International Petroleum Industry Environmental Conservation Assn.UK | | | | Details |
| IRAA | Independent Refiners Association of America | | | | Details |
| IRENA | International Renewable Energy Agency | | | | Details |
| IRSHAD | Related with Petroleum Ports Authority and Shipping Agents | | | | Details |
| ISA | International System Alignment | | | | Details |
| ISA | International Standard Atmosphere (see comment) | | | | Details |
| ISA | Instruction Set Architecture | | | | Details |
| ISA | Instrument Society of America | | | | Details |
| ISSA | International Slurry Surfacing Association | | | | Details |
| ITA | ITALY | | | | Details |
| IUHTAUTC | If Used, Half Time ActUally To Count | | | | Details |
| IUPAC | International Union of Pure and Applied Chemistry | | | | Details |
| J&A | Junked and abandoned | | | | Details |
| J&A | junked & abandoned | | | | Details |
| JA | JAPAN | | | | Details |
| jac | jacket | | | | Details |
| Jack | Jackson | | | | Details |
| JAM | Joint Analyzed Make-up | | | | Details |
| JAM | JAMAICA | | | | Details |
| Jana | Jubail Chemical Industries | | | | Details |
| Japex | Japan Petroleum Exploration Ltd. | | | | Details |
| JAPEX | Japan Petroleum Exploration Co. Ltd. Japan | | | | Details |
| JAPT | Japanese Assn. for Petroleum Technology Japan | | | | Details |
| Jasp | jasper(oid) | | | | Details |
| Jax | Jackson sand | | | | Details |
| JFA | jet fuel(aviation) | | | | Details |
| JGA | Japan Gas Association Japan | | | | Details |
| JHA | Job Hazard Analysis | | | | Details |
| JOA | Joint Operating Agreement | | | | Details |
| JRA | job risk assessment | | | | Details |
| JSA | Job Safety Analysis | | | | Details |
| JSA | job safety analysis JT (gas) | | | | Details |
| JSEA | Job Safety Environment Analysis | | | | Details |
| JVA | Joint Venture Agreement | | | | Details |
| KA | Kraftaggregat | | | | Details |
| kabs | Absolute Permeability. | | | | Details |
| KAC | Kuwait Airways Corporation | | | | Details |
| KAFCO | Kuwait Aviation Fuelling Company | | | | Details |
| KAFCO | Kuwait Aviation Fueling Co. KSC Kuwait | | | | Details |
| Kai | Kaibib | | | | Details |
| KALREZTM | a brand name for a high temperature seal | | | | Details |
| kao | kaolin | | | | Details |
| KAUST | King Abdullah University of Science and Technology | | | | Details |
| Kay | Kayenta | | | | Details |
| KAZ | KAZAKHSTAN | | | | Details |
| KAZGOSNEDRA | Kazakhstan | | | | Details |
| kcal | kilocalorie | | | | Details |
| KDB-Plat | kelly drill bushing to platform | | | | Details |
| KERMAC | Kerr-McGee Corp. | | | | Details |
| KEVLARTM | an extremely strong fiber, common in composites | | | | Details |
| KFAED | Kuwait Fund for Arab Economic Development | | | | Details |
| kg-cal | kilogram-calorie | | | | Details |
| KGRA | known geothermal resource area | | | | Details |
| KIA | Kuwait Investment Authority | | | | Details |
| Kia | Kiamichi | | | | Details |
| KIOGA | Kansas Independent Oil and Gas Association | | | | Details |
| Kl-Packer | Klappen-Packer | | | | Details |
| KMA | KMA sand | | | | Details |
| KNA | SAINT KITTS AND NEVIS | | | | Details |
| KOGA | Kentucky Oil & Gas Association | | | | Details |
| KOGAS | Korea Gas Corporation | | | | Details |
| KOGAS | Korean Gas Corp. Korea | | | | Details |
| kPa | kilopascal, 69 kPa per psi, 1000 psi = 6900 kPa | | | | Details |
| kPa | kilopascal | | | | Details |
| KVA | Kilo Volt Ampere | | | | Details |
| kva | kilovolt-ampere | | | | Details |
| kvah | kilovolt-ampere-hour | | | | Details |
| kvar | kilovar; reactive kilovolt-ampere | | | | Details |
| kvar-hr | kilovar-hour | | | | Details |
| L/Alb | Lower Albany | | | | Details |
| LA | LAOS | | | | Details |
| lA | Iowa | | | | Details |
| LA | Louisiana | | | | Details |
| LA | level alarm | | | | Details |
| LA | lightning arrester | | | | Details |
| LA | load acid | | | | Details |
| La | Mte La Motte | | | | Details |
| lab | labor | | | | Details |
| lab | laboratory | | | | Details |
| LACT | Lease Automatic Custody Transfer | | | | Details |
| LACT | lease automatic custody transfer unit A calibrated measurement device used as an official sales point for crude oil transfer into a second party pipeline | | | | Details |
| LAD | Logging After Drilling | | | | Details |
| lad | ladder | | | | Details |
| LAER | Lowest Achievable Emission Rate | | | | Details |
| LAFB | Libyan Arab Foreign Bank | | | | Details |
| LAG | lagging | | | | Details |
| LAH | Lookahead | | | | Details |
| LAIC | Libyan Arab Investment Company | | | | Details |
| Lak | Lakota | | | | Details |
| lam | laminated. laminations | | | | Details |
| lam | laminated, lamination(s) | | | | Details |
| LAN | local area network | | | | Details |
| Land | Landulina | | | | Details |
| Lans | Lansing | | | | Details |
| LAO | LAOS | | | | Details |
| LAOT | Linear Activation Override Tool | | | | Details |
| Lapco | Lavan Petroleum Company | | | | Details |
| Lar | Laramie | | | | Details |
| LARS | Launch & Recovery System | | | | Details |
| LAS | lower anhydrite stringer | | | | Details |
| LASH | Light Aboard SHip | | | | Details |
| LASMO | LASMO plc (London & Scottish Marine Oil Co.) UK | | | | Details |
| LASR | Laser Log | | | | Details |
| LAT | Lowest Astronomical Tide | | | | Details |
| LAT | LATitude | | | | Details |
| LATL | Lateral | | | | Details |
| Laud | Lauders | | | | Details |
| LAUF | lost and unaccounted for gas | | | | Details |
| LAYCAN | LAYday CANcelling date | | | | Details |
| LAYR | Multi-Layer Testing | | | | Details |
| Layt | Layton | | | | Details |
| LCA | SAINT LUCIA | | | | Details |
| LCA | leakoff control acid | | | | Details |
| LCA | life-cycle assessment | | | | Details |
| LDCA | LINC Downhole Coupler Assembly | | | | Details |
| Leadv | Leadville | | | | Details |
| LEAKL | Leak Detection Log | | | | Details |
| LFA | Live Fluid Analyzer | | | | Details |
| LGA | Liberated Gas Average (equal to the background gas) | | | | Details |
| LGA | Laboratoire de Geophysique Applique Algeria | | | | Details |
| LIOGA | Louisiana Independent Oil & Gas Association | | | | Details |
| LIRA | Logistic and Infrastructure Resource Assessment | | | | Details |
| LKA | SRI LANKA | | | | Details |
| LMAP | Location Map | | | | Details |
| LNFT-IA | liquid, no flow test, inside annulus | | | | Details |
| LOA | Letter Of Approval, Letter Of Acceptance | | | | Details |
| LOA | Letter Of Application | | | | Details |
| LOA | Letter Of Award | | | | Details |
| LOA | Lenght Over All | | | | Details |
| LOA | Letter of Authorisation/Agreement/Authority | | | | Details |
| LOA | Letter of Acceptance | | | | Details |
| LOA | length overall | | | | Details |
| LOPA | Layer of Protection Analysis | | | | Details |
| Losal | low salt or fresher water | | | | Details |
| LP-Gas | liquefied petroleum gas | | | | Details |
| LPSA | laser particle size analysis | | | | Details |
| LRAP | long-range automation plan | | | | Details |
| LRTAP | Long-Range Transboundary Air Pollution | | | | Details |
| LSA | Low Specific Activity scale | | | | Details |
| LT valve | Low Torque valve | | | | Details |
| LTA | lost time accident | | | | Details |
| LUBRITURIA | Lubricantes Turia S.A. Spain | | | | Details |
| LVA | LATVIA | | | | Details |
| M&A | Metering & Allocation | | | | Details |
| MA | Management Adjustment | | | | Details |
| MA | master of arts | | | | Details |
| Ma | Million years ago | | | | Details |
| MA | MADAGASCAR | | | | Details |
| MA | MOROCCO | | | | Details |
| MA | Massachusetts | | | | Details |
| MA | mud acid | | | | Details |
| MA | massive anhydrite | | | | Details |
| ma | microampere | | | | Details |
| ma | milliampere | | | | Details |
| m-a | microampere | | | | Details |
| Ma’adin | Saudi Arabian Mining Company | | | | Details |
| MAASP | Maximum Acceptable [or Allowable] Annular Shut-in Pressure | | | | Details |
| MAASP | Max Allowable Annular Surface Pressure | | | | Details |
| MAASP | Maximum Acceptable Annular Surface Pressure | | | | Details |
| MAASP | Maximum Acceptable Annular Shut-in Pressure | | | | Details |
| MAASP | maximum allowable annular surface pressure | | | | Details |
| MABANAFT | Marquard & Bahls AG Germany | | | | Details |
| MAC | Multipole Acoustic Log | | | | Details |
| MAC | Multipole Array Acoustilog | | | | Details |
| MAC | MACAU | | | | Details |
| MAC | medium amber cut | | | | Details |
| MAC2 | Multipole Array Acoustilog | | | | Details |
| mach | machine | | | | Details |
| Mack | Mackhank | | | | Details |
| MACL | Multiarm Caliper Log | | | | Details |
| MACT | Multi-Arm Caliper Tool | | | | Details |
| MACT | Maximum Achievable Control Technology | | | | Details |
| Mad | Madison | | | | Details |
| MAE | Mean Absolute Error | | | | Details |
| MAF | SAINT MARTIN (FRENCH PART) | | | | Details |
| mag | magnetic, magnetometer | | | | Details |
| MAG | Magnelog | | | | Details |
| MAGL | Nuclear Magnetism | | | | Details |
| Magma | molten rock (lava) that crystallizes into an igneous rock | | | | Details |
| MAGST | Magnetostratigraphic Report | | | | Details |
| MAHBRT | metres along hole below rotary table | | | | Details |
| MAI | Compact Array Induction | | | | Details |
| maint | maintenance | | | | Details |
| MAIR | Maximum Allowable (water) Injection Rate | | | | Details |
| maj | major, majority | | | | Details |
| Major | typically a large operator, usually a multinational oil company that is usually a large producer in several areas of the world | | | | Details |
| mall | malleable | | | | Details |
| MAMR | Main Administration of Mineral Resources | | | | Details |
| MAN | Metropolitin Area Network | | | | Details |
| MAN | Multi Array Neutron | | | | Details |
| man | manifold | | | | Details |
| man | manual | | | | Details |
| man | op manually operated | | | | Details |
| MAN | Manometer | | | | Details |
| Manf | Manufacturer | | | | Details |
| Manit | Manitoban | | | | Details |
| Mann | Manning | | | | Details |
| MAOP | Maximum Allowable Operating Pressure | | | | Details |
| MAPDA | Middle Atlantic Petroleum Distribution Association | | | | Details |
| MAPL | Michigan Association of Petroleum Landmen | | | | Details |
| Maq | Maquoketa | | | | Details |
| MAR | Multidisciplinary Asset Review | | | | Details |
| MAR | MOROCCO | | | | Details |
| mar | marine | | | | Details |
| mar | maroon | | | | Details |
| MARA | Maralog | | | | Details |
| March | Marchand | | | | Details |
| marg | marginal | | | | Details |
| Marg. | Marginulina | | | | Details |
| Marg. coco. | Marginulina coco | | | | Details |
| Marg. fl. | Marginulina flat | | | | Details |
| Marg. Rd | Marginulina round | | | | Details |
| Marg. Tex. | Marginulina texana | | | | Details |
| margas | marine gasoline | | | | Details |
| MARICONSULT | Technical support to Transmed Algeria | | | | Details |
| Mark | Markham | | | | Details |
| Marm | Marmaton | | | | Details |
| MARPOL | Marine Pollution | | | | Details |
| MARR | Maximum Allowable Reservoir Rate | | | | Details |
| MARSH | Marshal(ling) | | | | Details |
| MASP | maximum allowable surface pressure | | | | Details |
| mass | massive | | | | Details |
| Mass | pr. Massilina pratti | | | | Details |
| MAT | Minimum Alternative Ta.x | | | | Details |
| mat | material | | | | Details |
| Mat | matter | | | | Details |
| Math | mathematics | | | | Details |
| matl | material | | | | Details |
| MAW | mud acid wash | | | | Details |
| MAWP | Maximum Allowed Working Pressure | | | | Details |
| MAWP | Maximum Allowable Working Pressure | | | | Details |
| max | maximum | | | | Details |
| MAXIMO | Computer Based Materials Management System (IBM) | | | | Details |
| MaxIP | the largest production volume for a month, divided by the number of days in that month | | | | Details |
| MAXR | Monobore Automatic X-Type Release | | | | Details |
| May | Maywood | | | | Details |
| MAZ | Multi Azimuth | | | | Details |
| Mbal | material balance calculation of fluid production | | | | Details |
| MCA | mud cut acid | | | | Details |
| MCA | mud cleanout agent | | | | Details |
| MCA | mud-cut acid | | | | Details |
| MDA | Monopole Dipole Acoustic | | | | Details |
| MDA | Monopole Dipole Array | | | | Details |
| MDA | MOLDOVA | | | | Details |
| MDAH | Measured Depth Along Hole | | | | Details |
| MDEA | Methyl Diethanolamine (aMDEA) | | | | Details |
| MDEA | methyl diethanolamine | | | | Details |
| MEA | Monoethanolamine | | | | Details |
| MEA | ethanolamine | | | | Details |
| Meak | Meakin | | | | Details |
| meas | measure(ed)(ment) | | | | Details |
| MEAW | Middle East and Arab World | | | | Details |
| Medevac | Medical Evacuation (type of a drill that simulates the man-down situation) | | | | Details |
| MEGAL | Mittle-Europaische-Gasleitungsgesellschaft Germany | | | | Details |
| MEGAS | Middle East Gas Summit | | | | Details |
| MENA | Middle East & North Afrika | | | | Details |
| MENA | Middle East and North Africa (includes Algeria, Egypt, Iran, Iraq, Kuwait, Libya, Qatar, Saudi Arabia, and the United Arab Emirates) | | | | Details |
| mercap | mercaptan | | | | Details |
| meta | metamorphic | | | | Details |
| METAP | Mediterranean Environmental Technical Assistance Program | | | | Details |
| MFA | male to female angle | | | | Details |
| MIBank | Misr International Bank | | | | Details |
| Mica | a silica mineral, often present as ultra thin flakes and sometimes mobile | | | | Details |
| mica | micaceous | | | | Details |
| mica | mica, micaceous | | | | Details |
| MIDTAP | Middle East Oil Tankage & Pipelines Egypt | | | | Details |
| MIGA | Multilateral Investment Guarantee Agency | | | | Details |
| MIN/MAX | Minimum/Maximum (cargo quantity) | | | | Details |
| MIPAL | Micropalaeo Log | | | | Details |
| MIT-IA | mechanical integrity test – inside annulus | | | | Details |
| Mkta | Minnekahta | | | | Details |
| ML/CAL | Minilog Caliper | | | | Details |
| ML/CAL/GR | Minilog Caliper Gamma Ray | | | | Details |
| MLAT | Microlateral | | | | Details |
| MLL/CAL | Microlaterolog-Caliper | | | | Details |
| MLW-PLAT | mean low water to platform | | | | Details |
| MMgal/day | million gallons per day | | | | Details |
| MMTPA | Millions of Metric Tonnes per Annum | | | | Details |
| MOA | Memorandom of Agreement | | | | Details |
| MODA | Manual of Delegated Authority | | | | Details |
| MOGA | Michigan Oil & Gas Association | | | | Details |
| MPA | Micropalaeo Analysis Report | | | | Details |
| MPa | Mega Pascal | | | | Details |
| MPa | Megapascals, 1 million Pascals | | | | Details |
| mPa | megapascal | | | | Details |
| MPA | Michigan Petroleum Association | | | | Details |
| MPAL | Magellan Petroleum Australia Ltd. Australia | | | | Details |
| MPAP | Major Project Approval Process | | | | Details |
| MPGR-Soap | multipurpose grease soap base | | | | Details |
| MRPA | MDT - Dual-Packer Module (see comment!) | | | | Details |
| MSA | methane sulfonic acid | | | | Details |
| MSA | multiple service acid | | | | Details |
| MTA | General Directorate of Mineral Research & Exploration Turkey | | | | Details |
| MTAB | Mass Transfer Allocation Balance (meter) | | | | Details |
| MWA | Management Walk Around | | | | Details |
| MWAG | Miscible WAG | | | | Details |
| N/A | Not Applicable | | | | Details |
| n/a | Not Announced | | | | Details |
| na | Not Applicable | | | | Details |
| NA | NETHERLANDS ANTILLES | | | | Details |
| NA | NAMIBIA | | | | Details |
| NA | Non-Associated natural gas | | | | Details |
| NA | not available | | | | Details |
| NAA | Northern Appraisal Area | | | | Details |
| NAABSA | Not Always Afloat But Safely Aground | | | | Details |
| Nac | Nacotoch | | | | Details |
| nac | nacreous | | | | Details |
| NACD | National Association of Chemical Distributors | | | | Details |
| NACE | National Association of Corrosion Engineers | | | | Details |
| NACE | National Association of Corrosion | | | | Details |
| NaCl | Sodium Chloride (table salt) | | | | Details |
| NaCl | sodium chloride salt Halite | | | | Details |
| NaCL | sodium chloride | | | | Details |
| NaCO3 | sodium carbonate | | | | Details |
| NACOPS | National Advisory Committee on Petroleum Statistics (Canada) | | | | Details |
| NACR | National Association of Chemical Recyclers | | | | Details |
| NAD | North American Datum | | | | Details |
| NAEP | National Association of Environmental Professionals | | | | Details |
| NAESB | North American Energy Standards Board | | | | Details |
| NAESCO | National Association of Energy Services Companies | | | | Details |
| NAFTAL | Entreprise Nationale de Raffinage et de Distribution des Produits Petroliers Algeria | | | | Details |
| NAFTEC | Refining subsidiary of SONATRACH Algeria | | | | Details |
| NAFTOGAZ | Centre de Developpement et d’Application des Techniques Petrolieres et Gaieres Algeria | | | | Details |
| NAG | no appreciable gas | | | | Details |
| NALRD | Northern Alberta Land Registration district | | | | Details |
| NAM | Nederlandse Aardolie Maatschappij B.V. | | | | Details |
| NAM | NAMIBIA | | | | Details |
| NAM | Nederlandse Aardolie Mij BV Netherlands | | | | Details |
| Nama | Arabian Industrial Development Company | | | | Details |
| NAMCOR | National Petroleum Corp. of Namibia Namibia | | | | Details |
| NANG | Non Associated Natural Gas | | | | Details |
| NAO | North Africa & Offshore | | | | Details |
| NAOC | North Aspheron Operating Company | | | | Details |
| NaOH | sodium hydroxide | | | | Details |
| NAOHSM | National Association of Oil Heating Service Managers | | | | Details |
| nap | naptha | | | | Details |
| NAPF | Non Aqueous Phase Fluid | | | | Details |
| Napocor | National Power Corporation | | | | Details |
| NARO | National Association of Royalty Owners | | | | Details |
| NARR | narrative | | | | Details |
| NAS | National Academy of Science | | | | Details |
| NASA | Non Active Side Arm (term used in the North Sea for kill wing valve on a Xmas tree) | | | | Details |
| NASA | Non Active Side Arm | | | | Details |
| NASA | National Aeronautical and Space Administration | | | | Details |
| NaSH | sodium hydrosulfide | | | | Details |
| NAT | Network Address Translation | | | | Details |
| nat | natural | | | | Details |
| Nat 'l | National | | | | Details |
| nat’l | national | | | | Details |
| NATA | National Scale Air Toxics Assessment | | | | Details |
| Natgas | National Gas Company | | | | Details |
| NATO | North Atlantic Treaty Organization | | | | Details |
| NATREF | National Petroleum Refiners of South Africa (Pty) Ltd. South Africa | | | | Details |
| Nav | Navajo | | | | Details |
| NAVIG | Navigational Log | | | | Details |
| Navr | Navarro | | | | Details |
| NBAD | National Bank of Abu Dhabi | | | | Details |
| NCA | National Communications Authority | | | | Details |
| NCPSA | Natural Gas Processors Suppliers Association | | | | Details |
| NDA | National Drilling Association | | | | Details |
| NEA | nonemulsion acid | | | | Details |
| NEMA | National Electrical Manufacturers Association | | | | Details |
| NEPA | National Environmental Policy Act | | | | Details |
| NEPA | National Environmental Policy Act of 1969 | | | | Details |
| NESHAP | national emissions standards for hazardous air pollutants | | | | Details |
| NESHAP | National Emission Standard for Hazardous Air Pollutants | | | | Details |
| NESHAPs | National Emission Standards for Hazardous Air Pollutants | | | | Details |
| NETRA | Norddeutsche Erdgas Transversale & Co. Germany | | | | Details |
| NFA | Net Foriegn Assets | | | | Details |
| NFA | Net Fixed Assets | | | | Details |
| NFA | No Further Action | | | | Details |
| NFA | No Further (CapEx) Activity | | | | Details |
| NFA | No Further Activity | | | | Details |
| NFPA | National Fire Protection Association (see comment) | | | | Details |
| NGA | NIGERIA | | | | Details |
| NGPA | Natural Gas Processor Association | | | | Details |
| NGSA | Natural Gas Supply Association | | | | Details |
| NHDA | National Hydrocarbons Data Archive (United Kingdom) | | | | Details |
| NKTA | West Kazakhstan Territorial Administration for Natural Resource Protection Kazakhstan | | | | Details |
| NLA | No Leasing, Administrative | | | | Details |
| NLA/LUP | No Leasing, Administrative/Land Use Planning | | | | Details |
| NLPGA | National Liquefied Petroleum Gas Association | | | | Details |
| NMA | National Mining Association | | | | Details |
| NMAGL | Nuclear Magnetism | | | | Details |
| NMOGA | New Mexico Oil and Gas Association | | | | Details |
| NOA | Notice of Acquisition | | | | Details |
| NOAA | National Oceanic and Atmospheric Administration | | | | Details |
| NOGEPA | Netherlands Oil & Gas Exploration & Production Assn. Netherlands | | | | Details |
| NOIA | National Ocean Industries Association | | | | Details |
| NOMADS | National Oil-Equipment Manufacturers and Delegates Society | | | | Details |
| NOPAT | Net Operating Profit After Tax | | | | Details |
| NPGA | National Propane Gas Association | | | | Details |
| NPRA | National Petrochemical & Refinery Association | | | | Details |
| NPRA | Naval Petroleum Reserve, Alaska | | | | Details |
| NPRA | National Petroleum Refiners Association | | | | Details |
| NPR-A | National Petroleum Reserve–Alaska | | | | Details |
| NRA | Natural Resources Authority | | | | Details |
| NTA | nitrilotriacetic acid, a chelant | | | | Details |
| NTOGA | North Texas Oil & Gas Association | | | | Details |
| NUMAR | Magnetic Resonance Image Log | | | | Details |
| NYA | not yet available | | | | Details |
| O&GCAW | oil & gas cut acid water | | | | Details |
| O&GCAW | oil and gas-cut acid water | | | | Details |
| o.a. | Over All | | | | Details |
| OA | Over Aged | | | | Details |
| OA | overall | | | | Details |
| OAB | Oman Arab Bank | | | | Details |
| OAH | overall height | | | | Details |
| Oakv | Oakville | | | | Details |
| OAL | OverAll Length (normally for x-overs) | | | | Details |
| OAL | overall length | | | | Details |
| OAP | outer annulus pressure | | | | Details |
| OAPEC | Organization of Arab Petroleum Countries | | | | Details |
| OAPEC | Organization of Arab Petroleum Exporting Countries | | | | Details |
| OAPEC | Organization of Arab Petroleum Exporting Countries (—) | | | | Details |
| OAU | Organization of African Unity | | | | Details |
| OAW | oil abandoned well | | | | Details |
| OBEVA | OBDT Evaluation Report | | | | Details |
| OCAW | Oil, Chemical & Atomic Workers International Union | | | | Details |
| OCENSA | Oleoducto Central S.A. Colombia | | | | Details |
| OCSLA | Outer Continental Shelf Lands Act | | | | Details |
| ODAC | Oil Depletion Analysis Centre | | | | Details |
| OEA | Operaciones Especiales Argentinas Argentina | | | | Details |
| OFA | Optical Fluid Analyser | | | | Details |
| OFA | Oxygenated Fuels Association | | | | Details |
| OFAC | Office of Foreign Asset Control | | | | Details |
| OGAA | Oil and Gas Activities Act (law in British Colombia) | | | | Details |
| OGSA | Oil and Gas Services Australia | | | | Details |
| OGSA | OMV Gas Storage Austria GmbH | | | | Details |
| OHRA | Occupational Health Risk Assessment | | | | Details |
| OHSAS | Occupational Health and Safety Assessment Series | | | | Details |
| OIA | Oil Import Administration | | | | Details |
| OIAB | Oil Import Appeals Board | | | | Details |
| oilfract | Oil fractured | | | | Details |
| OIPA | Oklahoma Independent Petroleum Association | | | | Details |
| OLADE | Organization Latinoamericana de Energia Ecuador | | | | Details |
| OLECASA | Oleoductos Canarios S.A. Spain | | | | Details |
| OMAF | Onshore Abu Dhabi Multiple Attenuation Task Force | | | | Details |
| ONACO | Orenburg Oil Company Russia | | | | Details |
| ONAN | Oil Natural Air Natural cooled transformer | | | | Details |
| Onarep | Office National de Recherche et d’Exploitation Petrolière | | | | Details |
| ONAREP | Office National des Recherches et d’Exploitations Petrolieres (Moroccan National Oil Co.) Morocco | | | | Details |
| ONAS | National Wastewater Authority | | | | Details |
| OOGA | Ohio Oil & Gas Association | | | | Details |
| OPA | oil pollution act | | | | Details |
| OPA 90 | The US Oil Pollution Act of 1990 | | | | Details |
| OPAB | Oljeprospektering AB Sweden | | | | Details |
| OPECNA | OPEC News Agency OPEC | | | | Details |
| OR&A | Operations Readiness & Availability | | | | Details |
| OR&A | Operations Readiness and Assurance | | | | Details |
| ORIAC | Oil Refining Industry Action Committee | | | | Details |
| ORSANCO | Ohio River Valley Water Sanitation Commission | | | | Details |
| OSA | oil-soluble acid | | | | Details |
| OSHA | Occupational Safety and Health Administration (see comment) | | | | Details |
| OSHA | occupational safety and health administration, US government agency | | |
