| C | or Ceiling limit | | | | Details |
| c | center | | | | Details |
| C | Core Hole | | | | Details |
| C | Casing | | | | Details |
| C | Celsius | | | | Details |
| C | center(land description) | | | | Details |
| C | centigrade | | | | Details |
| c | coarse(ly) | | | | Details |
| C | Construction | | | | Details |
| C | Center Jet | | | | Details |
| c | critical | | | | Details |
| C | C Konserviert | | | | Details |
| C | Channel | | | | Details |
| C | Commercial | | | | Details |
| C | Connection | | | | Details |
| C | coulomb | | | | Details |
| c | revolution (cycle) | | | | Details |
| C | Construction | | | | Details |
| C | Conductor | | | | Details |
| C | Carbon | | | | Details |
| C & E | Cause & Effect | | | | Details |
| C limit | or Ceiling limit | | | | Details |
| C O | Carbon Oxygen | | | | Details |
| C O | Carbon-Oxygen | | | | Details |
| C pump | Centrifugal Pump ("low pressure - high volume" pump to transfer liquid on rig site) | | | | Details |
| C term | Construction | | | | Details |
| C to C | center to center | | | | Details |
| C to E | center to end | | | | Details |
| C to F | center to face | | | | Details |
| C&A | compression and absorption plant | | | | Details |
| C&C | Circulate & Condition (ie mud) | | | | Details |
| C&C | circulate & condition | | | | Details |
| C&C | Construction & Commissioning | | | | Details |
| C&CH | circulated and conditioned hole | | | | Details |
| C&CM | circulated and conditioned mud | | | | Details |
| C&E | Well completion and equipment cost | | | | Details |
| C&E | Cause & Effect | | | | Details |
| C&F | Cost and Frieght | | | | Details |
| C&F | cost and freight | | | | Details |
| C&F | Cost With Freight | | | | Details |
| C&I | Control & Instrumentation | | | | Details |
| C&K | Choke & Kill (BOPs) | | | | Details |
| C&K | Choke and Kill | | | | Details |
| C&P | Cased & Perfed (completion type) | | | | Details |
| C&P | cased and perforated | | | | Details |
| C&P | cellar & pits | | | | Details |
| C&P | Contracting & Procurement | | | | Details |
| C&R | circulate and reciprocate | | | | Details |
| C&R | Conclusions & Recommendations | | | | Details |
| C&S | Cased and Suspended | | | | Details |
| C&S | Campana & Schott | | | | Details |
| C&W | coat and wrap(pipe) | | | | Details |
| C-C | Thru-Tubing Caliper | | | | Details |
| C-Cal | contact caliper | | | | Details |
| C-gr | coarse grained | | | | Details |
| C-IMS | Central Integrated Management System | | | | Details |
| C.I.F. | cost insurance and freight | | | | Details |
| c.min/(s.ft) | (revolution per second) per (foot per minute) | | | | Details |
| c.min/(s.m) | (revolution per second) per (meter per minute) | | | | Details |
| C.O.P. | completed on pump | | | | Details |
| C.P. | Cathodic protection or Corrosion Protection | | | | Details |
| c.s/(s.m) | (revolution per second) per (meter per second) | | | | Details |
| c.u. | GeoFrame legacy unit | | | | Details |
| C/ | contractor(i.e., C/John Doe) | | | | Details |
| C/A | commission agent | | | | Details |
| C/B | Crew Boat | | | | Details |
| C/BM | crawl beam | | | | Details |
| C/C | sshinC/sshinC | | | | Details |
| C/C | count ratio | | | | Details |
| C/C3 | coulomb per cubic centimeter | | | | Details |
| C/cm3 | coulomb per cubic centimeter | | | | Details |
| c/ft | revolution per thousand feet | | | | Details |
| C/G | coulomb per gram | | | | Details |
| C/g | coulomb per gram | | | | Details |
| C/H | Circulate to clean hole | | | | Details |
| C/H | cased hole | | | | Details |
| C/L | Control Line (the hydraulic line for controling SSSV and chemical injection in completion) | | | | Details |
| C/L | center line | | | | Details |
| C/M | Circulate to condition mud | | | | Details |
| c/m3 | revolution per cubic meter | | | | Details |
| c/min | revolution per minute | | | | Details |
| C/N | Class Number | | | | Details |
| C/O | Change Out | | | | Details |
| c/o | care of | | | | Details |
| C/O | Clean Out | | | | Details |
| C/O | Circulate Out | | | | Details |
| C/P | Circulate pill | | | | Details |
| C/P | CharterParty | | | | Details |
| C/S | Circulate for sample | | | | Details |
| C/S | Client Server | | | | Details |
| c/s | revolution per second | | | | Details |
| c/s2 | revolution per second per second | | | | Details |
| C/T | Change tools | | | | Details |
| C/T | Caing / Tubing | | | | Details |
| C/U | Clean Up | | | | Details |
| C/W | Complete With | | | | Details |
| C/W | Clockwise | | | | Details |
| C/W | Come With | | | | Details |
| c/w | Carried with | | | | Details |
| C/w | Comes with | | | | Details |
| C/X | sshinC / ssheX | | | | Details |
| C0 | C0 Kammerlift | | | | Details |
| C02 | Development Well-Carbon Dioxide | | | | Details |
| C0P | Counter 0 | | | | Details |
| C1 | Methane | | | | Details |
| C1 | through C5 hydrocarbons with one to five carbon atoms | | | | Details |
| C1 | Caliper 1 | | | | Details |
| C1AT | HNGS Detector 1 Coincidence Spectrum | | | | Details |
| C1AZ | Caliper 1 Azimuth | | | | Details |
| C1BR | HNGS Detector 1 Coincidence Bad Baseline | | | | Details |
| C1DT | HNGS Detector 1 Coincidence Deadtime | | | | Details |
| C1FR | HNGS Detector 1 Coincidence Fast Channel | | | | Details |
| C1HR | HNGS Detector 1 Coincidence Downhole Total Count_Rate | | | | Details |
| C1OF | HNGS Detector 1 Coincidence Overflow | | | | Details |
| C1P | Counter 1 | | | | Details |
| C1PA | Caliper 1 Projected Azimuth | | | | Details |
| C1PU | HNGS Detector 1 Coincidence Pileup | | | | Details |
| C1R1 | STC Peak Coherence, Receiver Array - Lower Slowness_Time_Coherence | | | | Details |
| C1R2 | STC Peak Coherence, Receiver Array - Upper Slowness_Time_Coherence | | | | Details |
| C1R3 | STC Peak Coherence, Receiver Array - | | | | Details |
| C1R4 | STC Peak Coherence, Receiver Array - | | | | Details |
| C1RB | Caliper 1 Relative Bearing | | | | Details |
| C1REX | STC Peak Coherence, Receiver Array - | | | | Details |
| C1S | Delayed Caliper for Film Presentation | | | | Details |
| C1SP | HNGS Detector 1 Coincidence Spectrum | | | | Details |
| C1T1 | STC Peak Coherence, Transmitter Array - | | | | Details |
| C1T2 | STC Peak Coherence, Transmitter Array - | | | | Details |
| C1T3 | STC Peak Coherence, Transmitter Array - | | | | Details |
| C1T4 | STC Peak Coherence, Transmitter Array - | | | | Details |
| C1TEX | STC Peak Coherence, Transmitter Array - | | | | Details |
| C1TR | HNGS Detector 1 Coincidence Total | | | | Details |
| C2 | Ethane | | | | Details |
| C2 | Kondensat | | | | Details |
| C2 | Caliper 2 | | | | Details |
| C2/S | square centimeter per second | | | | Details |
| C2AT | HNGS Detector 2 Coincidence Spectrum | | | | Details |
| C2B | Consumer to business | | | | Details |
| C2BR | HNGS Detector 2 Coincidence Bad Baseline | | | | Details |
| C2DT | HNGS Detector 2 Coincidence Deadtime | | | | Details |
| C2FR | HNGS Detector 2 Coincidence Fast Channel | | | | Details |
| C2HR | HNGS Detector 2 Coincidence Downhole Total Count_Rate | | | | Details |
| C2IL | Volume of Anhydrite, Salt, Sand, | | | | Details |
| C2OF | HNGS Detector 2 Coincidence Overflow | | | | Details |
| C2P | Counter 2 | | | | Details |
| C2PU | HNGS Detector 2 Coincidence Pileup | | | | Details |
| C2R1 | STC Energy Peak Coherence, Receiver Array | | | | Details |
| C2R2 | STC Energy Peak Coherence, Receiver Array | | | | Details |
| C2R3 | STC Energy Peak Coherence, Receiver Array | | | | Details |
| C2R4 | STC Energy Peak Coherence, Receiver Array | | | | Details |
| C2REX | STC Energy Peak Coherence, Receiver Array | | | | Details |
| C2S | Delayed Caliper for Film Presentation | | | | Details |
| C2SP | HNGS Detector 2 Coincidence Spectrum | | | | Details |
| C2T1 | STC Energy Peak Coherence, Transmitter | | | | Details |
| C2T2 | STC Energy Peak Coherence, Transmitter | | | | Details |
| C2T3 | STC Energy Peak Coherence, Transmitter | | | | Details |
| C2T4 | STC Energy Peak Coherence, Transmitter | | | | Details |
| C2TEX | STC Energy Peak Coherence, Transmitter | | | | Details |
| C2TR | HNGS Detector 2 Coincidence Total | | | | Details |
| C3 | Propane | | | | Details |
| C3 | cubic centimeter | | | | Details |
| C3 | Double R1 Radius (HDT) | | | | Details |
| C3/M | cubic centimeter per minute | | | | Details |
| C3/S | cubic centimeter per second | | | | Details |
| C3P | Counter 3 | | | | Details |
| C4 | Butane | | | | Details |
| C4 | Double R4 Radius (HDT) | | | | Details |
| C6 | Hexanes | | | | Details |
| C7+ | Heavy Hydrocarbon Components | | | | Details |
| C7+ | Heavy Hydrocarbon Components | | | | 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 |
| CA | Dietz shape factors | | | | Details |
| CA | Capital Allocation | | | | Details |
| CA | Corporate Affairs | | | | Details |
| CA | Corrosion Allowance | | | | Details |
| CAA | Clean Air Act | | | | Details |
| CAA1 | Conductive Anomalies along Azimuth Curve | | | | Details |
| CAA2 | Conductive Anomalies along Azimuth Curve | | | | Details |
| CAA3 | Conductive Anomalies along Azimuth Curve | | | | Details |
| CAA4 | Conductive Anomalies along Azimuth Curve | | | | Details |
| CAB | cabinet | | | | Details |
| CAB | cable | | | | 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 |
| CACS | NPLC Acquisition Control Status | | | | Details |
| CAD | Computer Aided Design | | | | Details |
| CAD | computer-aided design | | | | Details |
| CAD | Canadian Dollar | | | | Details |
| CAD | Canadian dollar | | | | Details |
| Cadd | Caddell | | | | Details |
| CADE | Canadian Association of Drilling Engineers | | | | Details |
| CAEP | Conductive Anomaly on Even Pads of HDT | | | | Details |
| CAES | Compressed-Air Energy Storage | | | | Details |
| CAF | Currency adjusting factor (freight) | | | | Details |
| CAF | CENTRAL AFRICAN REPUBLIC | | | | Details |
| CAF | Condensate Allocation Factor | | | | 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 |
| CAL | calorie (international) | | | | Details |
| cal | calorie (international) | | | | Details |
| CAL | caliper diameter | | | | Details |
| CAL | Caliper | | | | Details |
| CAL1 | 4arm-Caliper1 | | | | Details |
| CAL1 | Caliper 1 | | | | Details |
| CAL2 | 4arm-Caliper2 | | | | Details |
| CAL2 | Caliper 2 | | | | Details |
| CAL3 | Caliper 3 | | | | Details |
| CAL4 | Caliper 4 | | | | Details |
| CAL5 | Caliper 5 | | | | Details |
| CAL6 | Caliper 6 | | | | Details |
| CAL7 | Caliper 7 | | | | Details |
| CAL8 | Caliper 8 | | | | 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 |
| CALC | Calcite | | | | Details |
| Calct | calcite | | | | Details |
| CALD | Caliper interpreted from Density | | | | Details |
| cale | calceneous | | | | Details |
| CALE | Borehole Diameter from Electrical Caliper | | | | Details |
| CALH | LDS Caliper High Reference | | | | Details |
| CALHI | ADC Cal HI | | | | Details |
| CALHI_DL | ADC Cal HI | | | | Details |
| CALI | Caliper Log | | | | Details |
| CALI | Generalized Caliper | | | | Details |
| CALI | General Caliper | | | | Details |
| CALI | Caliper | | | | Details |
| CALI | Caliper | | | | Details |
| CALI | Caliper | | | | Details |
| CALIBR | calibrate, calibration | | | | Details |
| CALIL | Caliper Log | | | | Details |
| CALI_FSI | Caliper from FSI* tool | | | | Details |
| CALI_TL | Caliper | | | | Details |
| CALL | LDS Caliper Low Reference | | | | Details |
| CALLO | ADC Cal LOW | | | | Details |
| CALLO_DL | ADC Cal LOW | | | | Details |
| CALM | Capture Aluminum | | | | Details |
| CALM | Catenary Anchor Leg Mooring | | | | Details |
| CALOG | Circumferential Acoustic Log | | | | Details |
| CALP | Caliper | | | | Details |
| CALQ | Combinable Shot Seismic Tool Caliper | | | | Details |
| CALR | Diameter from Resistivity Tool | | | | Details |
| CALS | Micro Resistivity Caliper | | | | Details |
| CALTEX | Various affiliates of Texaco Inc, and Chevron Corp. partnership — | | | | Details |
| CALU | Mean Diameter | | | | Details |
| Calv | Calvin | | | | Details |
| CALVE | Calibrated Velocity Log Data | | | | Details |
| CALX | Caliper from X-Axis of X-Y Caliper(s) | | | | Details |
| CALX | Second Caliper | | | | Details |
| CAM | Contract Accountable Manager | | | | Details |
| CAM | Corporate Annual Meeting | | | | 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 |
| CAN1 | Conductive Anomalies for Pad 1 | | | | Details |
| CAN2 | Conductive Anomalies for Pad 2 | | | | Details |
| CAN3 | Conductive Anomalies for Pad 3 | | | | Details |
| CAN4 | Conductive Anomalies for Pad 4 | | | | Details |
| Cane | Riv Cane River | | | | Details |
| CANL | Computer Analysis | | | | Details |
| CanOxy | Canadian Occidental Petroleum Ltd. | | | | Details |
| CANP | Current Annulus Pressure | | | | Details |
| Cany | canyon | | | | 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 |
| CAO | Computer Aided Operations | | | | Details |
| CaO | calcium oxcide | | | | Details |
| CAO | Chief Accounting Officer | | | | Details |
| CAO | Chief Administrative Officer | | | | Details |
| CAO | Chief Analytics Officer | | | | Details |
| CAO | Chief Accounting Officer | | | | 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 |
| CAOP | Conductive Anomalies on Odd Pads | | | | 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 |
| CAP1 | Plus Calibration Large Arm | | | | Details |
| CAP2 | Plus Calibration Small Arm | | | | Details |
| CAPAG | Entreprise Moderne de Canalisations Petrolieres, Aquiferes et Gasieres France | | | | Details |
| CAPEX | Capital Expenditure | | | | Details |
| CAPEX | Capital Expenditures | | | | Details |
| CAPEX | Capital Expenditure (Cost) | | | | Details |
| CAPI | capillary | | | | Details |
| CAPM | Capital asset pricing model | | | | Details |
| CAPP | Canadian Association of Petroleum Producers | | | | Details |
| CAPP | Canadian Association of Petroleum Producers | | | | Details |
| CAPS | Corrective Action Preventive System | | | | Details |
| CAR | Company Appointed Representative | | | | Details |
| CAR | Corrective Action Request | | | | Details |
| CAR | Corporate Activity Report | | | | Details |
| Car | Carlile | | | | Details |
| CAR1 | Rotated Caliper 1 According to RB | | | | Details |
| CAR2 | Rotated Caliper 2 According to RB | | | | Details |
| CAR3 | Rotated Caliper 3 According to RB | | | | Details |
| CAR4 | Rotated Caliper 4 According to RB | | | | Details |
| carb | carbonaceous | | | | Details |
| carb | test carbontetrachloride | | | | Details |
| CARB | Carbonate | | | | Details |
| CARB | Volume of Carbon | | | | Details |
| CARBESA | Carbon Black Espanola S.A. Spain | | | | Details |
| Caren | cavernous | | | | Details |
| Carm | Carmel | | | | Details |
| CART | Cam Actuated Running Tool (Housing Running Tool) | | | | Details |
| CART | Cap Replacement Tool | | | | Details |
| CART_TEMP | Cartridge Temperature | | | | Details |
| CART_TEMP_SL | Cartridge Temperature - Station Log | | | | 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 |
| CAS1 | Casing Number 1 Radius | | | | Details |
| CAS2 | Casing Number 2 Radius | | | | Details |
| CAS3 | Casing Number 3 Radius | | | | Details |
| CASE | Computer-aided Software Engineering | | | | Details |
| Casing) | (Thru | | | | Details |
| CASING_PRES | Casing pressure | | | | 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 |
| CASW | Casing Weight | | | | Details |
| CASZ | ECSC Acquisition Control Status | | | | 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 |
| CAT | Corrective Action Team | | | | Details |
| CATe | Core Asset Team | | | | Details |
| cath | cathodic | | | | Details |
| CATR | Clean Air Transportation Rule | | | | Details |
| CATS | Cableless Telemetry System | | | | Details |
| CATS | Cross-Application Time Sheet | | | | Details |
| CATT | Capabilities & Technology Team | | | | Details |
| caus | caustic | | | | Details |
| cav | cavity | | | | Details |
| Cav | caving | | | | Details |
| CAVL | Compensated Acoustic Velocity | | | | Details |
| CAW | Completions and Workovers | | | | Details |
| CAZ1 | Zero Calibration Large Arm | | | | Details |
| CAZ2 | Zero Calibration Small Arm | | | | Details |
| CAZI | Calibrated azimuth | | | | Details |
| CB | Crew Boat | | | | Details |
| CB | Core Barrel | | | | Details |
| CB | CAMBODIA | | | | Details |
| CB | changed(ing) bits | | | | Details |
| CB | continuous blowdown | | | | Details |
| CB | counterbalance(pumping equip.) | | | | Details |
| CB | Bulk Compressibility | | | | Details |
| CB1 | Conductivity of Button 1 of SHDT | | | | Details |
| CB1A | Conductivity of Button 1A of SHDT | | | | Details |
| CB2 | Conductivity of Button 2 of SHDT | | | | Details |
| CB2A | Conductivity of Button 2A of SHDT | | | | Details |
| CB3 | Conductivity of Button 3 of SHDT | | | | Details |
| CB3A | Conductivity of Button 3A of SHDT | | | | Details |
| CB4 | Conductivity of Button 4 of SHDT | | | | Details |
| CB4A | Conductivity of Button 4A of SHDT | | | | Details |
| CBA | Commercial Bid Assessment | | | | Details |
| CBA | ECS Capture Barium Relative Yield | | | | Details |
| CBAS | ECS Capture Barite Relative Yield | | | | Details |
| CBCP | Current Blender Proppant Concentration | | | | Details |
| CBD | Competence Based Development | | | | Details |
| CBD | Commercial Bank of Dubai | | | | Details |
| CBD | Casing Bottom Driller | | | | Details |
| CBDM3 | Borehole-compensated average deep button | | | | Details |
| CBDN | Bulk Density from Core | | | | Details |
| CBE | Commercial Bid Evaluation | | | | Details |
| CBF | Coiled Tubing Firing Head | | | | Details |
| CBFD | Current Base Fluid Density | | | | Details |
| CBFI | Current Base Fluid Index | | | | Details |
| CBFK | Current Base Fluid K' | | | | Details |
| CBFN | Current Base Fluid N' | | | | Details |
| CBFP | Current Base Fluid Relative Permeability | | | | Details |
| CBFS | CBL Amplitude (Far Spacing) | | | | Details |
| CBFT | CuBic FeeT | | | | Details |
| CBFT | Current Base Fluid Rheology Model | | | | Details |
| CBG | Coalbed gas | | | | Details |
| CBHP | Constant Bottomhole Pressure | | | | Details |
| CBHT | circulating bottom hole temperature | | | | Details |
| CBI | confidential business information | | | | Details |
| CBIL | CBIL Log | | | | Details |
| CBIL | Circumferential Borehole Imaging Log | | | | Details |
| CBJ | carbide blast joint | | | | Details |
| CBK | Commercial Bank of Kuwait | | | | Details |
| CBL | Cement Bond Log (measurement of casing cement integrity) | | | | Details |
| CBL | Cement Bond Log | | | | Details |
| CBL | Acoustic Cement Bond | | | | Details |
| CBL | cable(ing) | | | | Details |
| CBL | Cement Bond Logging | | | | Details |
| CBL | Acoustic Cement Bond Log | | | | Details |
| CBL | Casing Bottom Logger | | | | Details |
| Cbl | cobbles | | | | Details |
| CBL | CBL Amplitude | | | | Details |
| CBL GRN | Acoustic Cement Bond G/R Neutron | | | | Details |
| CBL N | Acoustic Cement Bond Neutron | | | | Details |
| CBL-GR | Cement Bond-Gamma Ray Logging | | | | Details |
| CBL-GRN | Cement Bond-Gamma Ray Neutron | | | | Details |
| CBL-N | Cement Bond-Neutron | | | | Details |
| CBL-VD | Variable Density Logging | | | | Details |
| CBL-VD | Cement Bond-Variable Density Logging | | | | Details |
| CBL/GR | Acoustic Cement Bond Gamma Ray | | | | Details |
| CBL/GR/NEU | Acoustic Cement Bond G/R Neutron | | | | Details |
| CBL/NEU | Acoustic Cement Bond Neutron | | | | Details |
| CBL5 | CBL Amplitude (5 f Spacing) | | | | Details |
| CBLF | CBL Amplitude Fluid Compensated | | | | Details |
| CBM | Choke Bridge Module XT Choke | | | | Details |
| CBM | Coal Bed Methane | | | | Details |
| CBM | Conventional Buoy Mooring | | | | Details |
| CBM | Choke Bridge Module - XT Choke | | | | Details |
| CBM | choke bridge module XT choke | | | | Details |
| CBM | Controlled Beam Migration | | | | Details |
| CBM | Condition Based Maintenance | | | | Details |
| CBMM2 | Borehole-compensated average medium button Medium_Resistivity | | | | Details |
| CBND | Cement Bond | | | | Details |
| CBNG | coal bed natural gas | | | | Details |
| CBNG | coalbed natural gas | | | | Details |
| CBO | Commercial Bank of Oman | | | | Details |
| CBOE | Chicago Board Options Exchange | | | | Details |
| CBOT | Chicago Board of Trade | | | | Details |
| CBP | Composite Bridge Plug | | | | Details |
| CBP | Country Business Plan | | | | Details |
| CBQ | Commercial Bank of Qatar | | | | Details |
| CBR | interactions between Crude oil/Brine/Rock | | | | Details |
| CBR | Crude oil/Brine/Rock | | | | Details |
| CBSL | CBL Amplitude (Sliding Gate) | | | | Details |
| CBSM1 | Borehole-compensated average shallow | | | | Details |
| CBST | Status of CBT | | | | Details |
| CBT | Computer Based Training | | | | Details |
| CBT | cement bond tool | | | | Details |
| CBT | Controlled Breakdown Technique | | | | Details |
| CBT | Cement Bond Tool | | | | Details |
| CBTS | CBT Status | | | | Details |
| CBTT | Combinable Borehole Televiewer Tool | | | | Details |
| CBU | Circulate Bottoms Up | | | | Details |
| CBVW | Capture Mode Bulk Volume Water | | | | Details |
| CBW | Clay Bound Water | | | | Details |
| CBW | Clay Bound Water (T2 from 0.3 to 3 milliseconds), | | | | Details |
| CC | Control Cabin|| | Control Cabin | Steuerkabine | cabine de contrôle | Details |
| CC | Carbon Copy | | | | Details |
| cc | cubic centimeter | | | | Details |
| CC | Cracked Cone | | | | Details |
| CC | COCOS (KEELING) ISLANDS | | | | Details |
| CC | casing choke (upper case) | | | | Details |
| CC | Compensated Porosity | | | | Details |
| CC | calcium chloride | | | | Details |
| CC | casing cemented(depth) | | | | Details |
| CC | closed cup | | | | Details |
| CC | Chemical Cutters | | | | Details |
| CC | Corrosion Coupns | | | | Details |
| CC | Control Cabin | | | | Details |
| CC | Climate Change | | | | Details |
| cc | GeoFrame legacy unit | | | | Details |
| CC | Creaming Curve | | | | Details |
| CC | Country Code | | | | Details |
| CC | Corrosion Coupon | | | | Details |
| CC0 | Counter Channel 0 | | | | Details |
| CC01 | Caliper Conductivity, Azimuth 1 | | | | Details |
| CC02 | Caliper Conductivity, Azimuth 2 | | | | Details |
| CC03 | Caliper Conductivity, Azimuth 3 | | | | Details |
| CC04 | Caliper Conductivity, Azimuth 4 | | | | Details |
| CC05 | Caliper Conductivity, Azimuth 5 | | | | Details |
| CC06 | Caliper Conductivity, Azimuth 6 | | | | Details |
| CC07 | Caliper Conductivity, Azimuth 7 | | | | Details |
| CC08 | Caliper Conductivity, Azimuth 8 | | | | Details |
| CC09 | Caliper Conductivity, Azimuth 9 | | | | Details |
| CC1 | 1-2-1/16-in. (25-52mm) Pipe | | | | Details |
| CC1 | Crosscorrelation 1 (IN VSP) | | | | Details |
| CC10 | Caliper Conductivity, Azimuth 10 | | | | Details |
| CC11 | Caliper Conductivity, Azimuth 11 | | | | Details |
| CC12 | Caliper Conductivity, Azimuth 12 | | | | Details |
| CC1C | Isolation AMP Offset for Center Electrode | | | | Details |
| CC1L | Casing Number 1 Collars and Centralizers - None | | | | Details |
| CC1R | Casing Number 1 Collars and Centralizers - None | | | | Details |
| CC1U | Isolation AMP Offset for Upper Electrode | | | | Details |
| CC2 | 2-3 / 8-4-in. (60-102mm) Pipe | | | | Details |
| CC2 | Counter Channel 2 | | | | Details |
| CC2C | Isolation AMP, D3-A3 Current, Center | | | | Details |
| CC2L | Casing Number 2 Collars and Centralizers - None | | | | Details |
| CC2R | Casing Number 2 Collars and Centralizers - None | | | | Details |
| CC2U | Isolation AMP, D3-A3 Current, Upper | | | | Details |
| CC3 | 4-1 / 4-5-9-/ 16 in. (108-141 mm) Pipe | | | | Details |
| CC3 | Counter Channel 3 | | | | Details |
| CC3L | Casing Number 3 Collars and Centralizers - None | | | | Details |
| CC3R | Casing Number 3 Collars and Centralizers - None | | | | Details |
| CCA | Conventional Core Analysis | | | | Details |
| CCA | Cut Casing | | | | Details |
| CCA | ECS Capture Calcium Relative Yield | | | | Details |
| CCAT | Theoretical CCA value | | | | Details |
| ccBU | circulate bottoms up | | | | Details |
| CCBU | Crosscorrelation Buffer | | | | Details |
| CCC | Consolidated Contractors Company | | | | Details |
| CCC | Clean Caribbean Cooperative (—) | | | | Details |
| CCC | Central Control Console | | | | Details |
| CCCA | Corrected Capture Calcium Relative Yield | | | | Details |
| CCCL | CBT Casing Collar Locator Amplitude | | | | Details |
| CCCOP | Conservation Committee of California Oil Producers | | | | Details |
| CCCS | Clean Current Cost of Supply | | | | Details |
| CCD | Casing Collar Depth | | | | Details |
| CCDF | Conditional Cumulative Distribution Function | | | | Details |
| CCDST | closed chamber DST | | | | Details |
| CCDW | CCL Downhole Command Echo | | | | Details |
| CCE | Constant Composition Expansion (type of PVT analysis) | | | | Details |
| CCE | Constant Composition Expansion | | | | Details |
| CCEA | Cabinet Committee on Economic Affairs | | | | Details |
| CCF | Cost Carry Forward | | | | Details |
| CCF | 100 Cubic Feet | | | | Details |
| CCFE | Corrected Capture Iron Relative Yield | | | | Details |
| CCFI | Consulting Center for Finance and Investment | | | | Details |
| CCGD | Corrected Capture Gadolinium Relative | | | | Details |
| CCGT | Combined Cycle Gas Turbine | | | | Details |
| CCHF | center of casinghead flange | | | | Details |
| CCHI | Capture Chi-square from GST-A/IGT Spectral Chi_Square | | | | Details |
| CCHL | ECS Capture Chlorine Relative Yield | | | | Details |
| CCHT | Core Chart Log | | | | Details |
| CCIC | Consolidated Contractors International Company | | | | Details |
| CCK | COCOS (KEELING) ISLANDS | | | | Details |
| Cck | casing choke | | | | Details |
| CCK | Corrected Capture Potassium Relative Yield Potassium_Yield | | | | Details |
| CCL | Casing Collar Locator | | | | Details |
| CCL | casing collar locator log | | | | Details |
| CCL | Casing Collar | | | | Details |
| CCL | Perforation Depth Control Log | | | | Details |
| CCL | Casing Collar Locator Amplitude | | | | Details |
| CCL | Casing Collar Locator Amplitude | | | | Details |
| CCL1 | Ultrasonic Casing Collar Locator 1 | | | | Details |
| CCL2 | Ultrasonic Casing Collar Locator 2 | | | | Details |
| CCL3 | Ultrasonic Casing Collar Locator 3 | | | | Details |
| CCL4 | Ultrasonic Casing Collar Locator 4 | | | | Details |
| CCLC | CCL Computed Amplitude | | | | Details |
| CCLD | CCL Discriminated Amplitude | | | | Details |
| CCLGO | cat-cracked light gas oil | | | | Details |
| CCLM | Monitor CCL | | | | Details |
| CCLP | Casing Collar Locator Perforation | | | | Details |
| CCLTP | Casing Collar Locator Through Tubing Plug | | | | Details |
| CCLU | Casing Collar Locator Ultrasonic | | | | Details |
| CCM | condensate-cut mud | | | | Details |
| CCMN | Carbon/Oxygen, Corrected, Minimum | | | | Details |
| CCMO | Credit Commercial du Moyen Orient | | | | Details |
| CCMR | CCL Actual Message Rate | | | | Details |
| CCMX | Carbon/Oxygen, Corrected, Maximum | | | | Details |
| CCN | Caliper Corrected Neutron | | | | Details |
| CCOD | Current Concentrator Out Density | | | | Details |
| CCP | Cathodic Corrosion Protection | | | | Details |
| CCP | central compressor plant | | | | Details |
| CCP | critical compression pressure | | | | Details |
| CCP | Caliper Casing Properties | | | | Details |
| CCP | Cumulative Condensate Production | | | | Details |
| CCPL | Caliper Casing Properties Measurement | | | | Details |
| CCPR | casing collar perforating record | | | | Details |
| CCPS | Caliper Casing Properties Measurement | | | | Details |
| CCPV | Charge Concentration per Unit Pore Volume | | | | Details |
| CCR | Change Control Request | | | | Details |
| CCR | Continuous Catalytic Reformer | | | | Details |
| CCR | Central Control Room | | | | Details |
| CCR | Conradson carbon residue | | | | Details |
| CCR | critical compression ratio | | | | Details |
| CCRE | Correlation Curve Resistivity | | | | Details |
| CCRT | Coct Control Reporting Tool (SAP Report) | | | | Details |
| CCS | Carbon Capture & Sequestration | | | | Details |
| CCS | Continuous Circulation System | | | | Details |
| CCS | Current Cost of Supply | | | | Details |
| CCS | Carbon (CO2) Capture & Sequestration | | | | Details |
| CCS | carbon capture and sequestration | | | | Details |
| CCS | California Coordinate System | | | | Details |
| CCS | cast carbon steel | | | | Details |
| CCS | computer control system | | | | Details |
| CCSI | Corrected Capture Silicon Relative Yield | | | | Details |
| CCSP | Current Casing Pressure | | | | Details |
| CCSU | Corrected Capture Sulfur Relative Yield | | | | Details |
| CCT | Closed Chamber Test | | | | Details |
| CCT | concentric coiled tubing | | | | Details |
| CCTE | Temperature | | | | Details |
| CCTI | Corrected Capture Titanium Relative Yield | | | | Details |
| CCTR | Cost Center | | | | Details |
| CCTS | Cable Cutter Tool sub | | | | Details |
| CCTV | Closed-Circuit TeleVision | | | | Details |
| CCU | catalytic cracking unit | | | | Details |
| CCU | Carbon Capture and Utilization | | | | Details |
| CCW | Counter Clock-Wise | | | | Details |
| ccw | counterclockwise | | | | Details |
| CD | Chart Datum | | | | Details |
| CD | Core Description | | | | Details |
| CD | Cost Depth chart | | | | Details |
| CD | Coned Dragged | | | | Details |
| CD | CHAD | | | | Details |
| CD | CONGO, THE DEMOCRATIC REPUBLIC OF THE | | | | Details |
| Cd | cadmium | | | | Details |
| CD | Calendar Day | | | | Details |
| CD | cold drawn | | | | Details |
| CD | contract depth | | | | Details |
| CD | Corporate Development | | | | Details |
| CD | candela | | | | Details |
| cd | candela | | | | Details |
| CD | Corporate Design | | | | Details |
| CD | Closed Drain | | | | Details |
| CD-I | Compact Disc-Interactive | | | | Details |
| CD-PL | cadmium plate | | | | Details |
| CDAT | Calibration Date | | | | Details |
| CDATA | Core Data | | | | Details |
| CDB | cement dump bailer | | | | Details |
| CDB | common data base | | | | Details |
| CDBC | Deep Induction Borehole Corrected | | | | Details |
| CDBD | Resistivity Deep Button down from RAB | | | | Details |
| CDBTF | common data base task force | | | | Details |
| CDBU | Resistivity Deep Button up from RAB | | | | Details |
| CDC | Career Development Center | | | | Details |
| CDC | Compensated Density Caliper | | | | Details |
| CDCL | Compensated Densilog Caliper | | | | Details |
| CDCL | ECS Capture Chlorine Borehole Minus | | | | Details |
| CDCL GR | Compensated Densilog Caliper Gamma Ray | | | | Details |
| CDCR | Deep Induction Electronic Calibrated Real | | | | Details |
| CDCX | Deep Induction Electronic Calibrated Quad | | | | Details |
| CDD | Continuous Dipmeter Digital | | | | Details |
| CDDS | C - D Diametral Shift | | | | Details |
| CDE1 | CSAT-1 Deviation | | | | Details |
| CDE2 | CSAT-2 Deviation | | | | Details |
| CDE3 | CSAT-3 Deviation | | | | Details |
| CDE4 | CSAT-4 Deviation | | | | Details |
| CDEB | Deep Induction Enhanced Borehole Corrected Deep_Induction_Conductivity | | | | Details |
| CDER | Deep Induction Enhanced Resolution Phasor | | | | Details |
| CDEV | Calibrated Borehole Deviation | | | | Details |
| CDF | Cumulative Density (Distribution) Function | | | | Details |
| CDF | Francs | | | | Details |
| CDF | Calibrated Downhole Force | | | | Details |
| CDF | Cumulative Distribution Functions | | | | Details |
| CDF | Cognite data fusion | | | | Details |
| CDG | colloidal-dispersion gels | | | | Details |
| CDGs | colloidal-dispersion gels | | | | Details |
| CDHR | Conductivity Deep Induction HiRes Phasor | | | | Details |
| CDI | Connate Water Compressibility Index | | | | Details |
| CDIS | CDI Synthetic Seismic Log | | | | Details |
| CDL | Compensated Density Log | | | | Details |
| CDL | compensated formation density log | | | | Details |
| CDL | Compensat ed Density | | | | Details |
| CDL | Compensated Density | | | | Details |
| CDL | cut drilling line | | | | Details |
| CDL | Compensated Densilog | | | | Details |
| CDL | Compensated Densilog | | | | 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 |
| CDLC GRN | Compensated Densilog Caliper G/R Neutron | | | | Details |
| CDLC M | Compensated Densilog Caliper Minilog | | | | Details |
| CDLC N | Compensated Densilog Caliper Neutron | | | | Details |
| CDLR | Deep Induction Test-loop Calibrated Real | | | | Details |
| CDLX | Deep Induction Test-loop Calibrated Quad | | | | Details |
| CDM | Continuous Dipmeter | | | | Details |
| CDM | Continuous Dip Meter | | | | Details |
| CDM | Diplog or Resistivity Dip | | | | Details |
| CDM | continuous dipmeter survey | | | | Details |
| CDM | Change and Data Management | | | | Details |
| CDM | Casing Drive Mechanism | | | | Details |
| CDMD | Continuous Dip Meter - Digital | | | | Details |
| CDN | Compensated Density Neutron | | | | Details |
| CDN | Compensated Density Neutron Tool | | | | Details |
| CDO | certified drawing outline | | | | Details |
| CDO | Collateralized debt obligation | | | | Details |
| CDP | Comprehensive Drilling Plan | | | | Details |
| CDP | Common Depth Point (geophysics) | | | | Details |
| CDP | Common Depth Point | | | | Details |
| CDP | Central Delivery Point | | | | Details |
| CDP | Conductivity Derived Porosity | | | | Details |
| CDP | Carbon Disclosure Project | | | | Details |
| CDPNE | College Degree Program for Non-Employees | | | | Details |
| CDPT | Corrected Depth | | | | Details |
| CDR | Compensated Dual Resistivity | | | | Details |
| CDR | Council for Development and Reconstruction | | | | Details |
| Cdr | Mtn Cedar Mountain | | | | Details |
| CDR | Continuous Directional Survey | | | | Details |
| CDR | Compensated Dual Resistivity Tool | | | | Details |
| CDR6 | Radial Current Density 6 ft | | | | Details |
| CDRA | Radial Current Density | | | | Details |
| CDRB | Radial Current Density For Bad Contact | | | | Details |
| CDRCL | Compensated Dual Resistivity Cal. Log | | | | Details |
| CDRM | Deep Induction Response Matched | | | | Details |
| CDRT | Completion Design Review Team | | | | Details |
| CDS | Completion Data System | | | | Details |
| CDS | Central Degassing Station | | | | Details |
| CDS | Continuous Direct ional Survey | | | | Details |
| CDS | Continuous Directional Survey | | | | Details |
| CDS | continuous directional service | | | | Details |
| CDS | Canadian Development Corp. | | | | Details |
| CDS | Credit default swap | | | | Details |
| CDS | Central Degassing Station | | | | Details |
| cdsr | condenser | | | | Details |
| CDT | Compensated Density | | | | Details |
| CDTC | Confidence Delta-T High Resolution | | | | Details |
| CDTE | Deep Induction Conductivity From PREDTE | | | | Details |
| CDTR | Confidence Delta-T High Resolution | | | | Details |
| CDTT | Confidence Delta-T High Resolution | | | | Details |
| CDU | Control Distribution Unit | | | | Details |
| CDU | Crude Distillation Unit | | | | Details |
| CDV | Critical Development Volume | | | | Details |
| CDVB | Deep Induction Very Enhanced Borehole | | | | Details |
| CDVM | Conseil Déontologique des Valeurs Mobilières | | | | Details |
| CDVR | Deep Induction Very Enhanced Resolution | | | | Details |
| Cdy | Cody(Wyoming) | | | | Details |
| CE | Civil Engineer | | | | Details |
| CE | Completion Engineer | | | | Details |
| CE | Corrosion Engineer | | | | Details |
| CE | Carottage Electric log (SP + Deep resistivity) or Cable Electric Log (name for wireline logging in French) | | | | Details |
| CE | OMV-Standard Bohrlochmessung (carottage electric) | | | | Details |
| CE | SRI LANKA | | | | Details |
| CE | completions engineer | | | | Details |
| CE | compensation efficiency | | | | Details |
| CE | Capital Employed | | | | Details |
| CE | Condensate Expansion (factor) | | | | Details |
| CE | Capital Efficiency | | | | Details |
| ce Ta | Center Tank | | | | Details |
| CEC | Cement Casing | | | | Details |
| CEC | Cation Exchange Capacity (see comment) | | | | Details |
| CEC | Cation Exchange Capacity | | | | Details |
| CEC | Cation_Exchange_Capacity | | | | Details |
| CEC | Cation Exchange Capacity | | | | Details |
| CECAN | CEC Analysis | | | | Details |
| CEDIPSA | Compania Espanola Distribuidora de Petroleos S.A. Spain | | | | Details |
| CEE | Central and Eastern Europe | | | | Details |
| CEF | Connecting Europe Facility|| | Connecting Europe Facility | Connecting Europe | L'interconnexion en Europe | Details |
| CEF | Connecting Europe Facility | | | | Details |
| CEF | Condensate Expansion Factor | | | | Details |
| CEFT | Code of First Echo Fall Time | | | | Details |
| CEGH | Central European Gas Hub | | | | Details |
| CEHL | Cain Energy Hydrocarbons Limited | | | | Details |
| CEIL | Cairn Energy India Limited | | | | Details |
| CEL | cement evaluation log | | | | Details |
| CEL | Cement Evaluation | | | | Details |
| cell | cellar | | | | Details |
| cell | cellular | | | | Details |
| CELP | P Celerity (Velocity) | | | | Details |
| CELS | S Celerity (Velocity) | | | | Details |
| CEM | Cementing Run | | | | Details |
| CEM | Cement(ed) | | | | Details |
| CEM | cement | | | | Details |
| CEM | Computed EPT Matrix | | | | Details |
| CEME | Cement Evaluation | | | | Details |
| CEMF | counter electromotive force | | | | Details |
| CEMP | Construction Environmental Management Plan | | | | Details |
| CEMS | continuous emission monitoring system | | | | Details |
| Ceno | Cenozoic | | | | Details |
| cent | centralizers | | | | Details |
| CentGas | Central Asia Gas Pipeline Ltd. | | | | Details |
| CENTIMETER | centimeter | | | | Details |
| CENTIMETERS | centimeter | | | | Details |
| CENTIMETRE | centimeter | | | | Details |
| CENTIMETRES | centimeter | | | | Details |
| centr | centrifugal | | | | Details |
| CEO | Chief Executive Officer|| | Chief Executive Officer | Geschäftsführer | Directeur Général | Details |
| CEO | Chief Executive Officer | | | | Details |
| cEOR | Chemical Enhanced Oil Recovery | | | | Details |
| CEP | Current Estimated Potential | | | | Details |
| CEP | Cement Plug | | | | Details |
| CEP&M | Comite d’Etudes Petrolieres et Marine France | | | | Details |
| CEPA | Canadian Energy Pipeline Association | | | | Details |
| CEPCO | City Ecuadoriana Production Co. Ecuador | | | | Details |
| CEPE | Corporacion Estatal de Petroleo Ecuatoriano Ecuador | | | | Details |
| ceph | cephalopod | | | | Details |
| CEPP | Chemical Emergency Preparedness Program | | | | Details |
| Cepsa | Compania Espanola de Petroleos | | | | Details |
| CEPSA | Compania Espanola de Petroleos, S.A. Spain | | | | Details |
| CEPT | EPT Conductivity | | | | Details |
| CEQ | council on environmental quality | | | | Details |
| CEQA | California Environmental Quality Act | | | | Details |
| CER0 | Energy Peak Coherence, Receiver Array - | | | | Details |
| CER1 | Label Energy Peak Coherence, Receiver | | | | Details |
| CER2 | Label Energy Peak Coherence, Receiver | | | | Details |
| CER3 | Label Energy Peak Coherence, Receiver | | | | 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 |
| CERE | Cement Remedial Log | | | | Details |
| CEREX | LABEL Energy Peak Coherence, Receiver | | | | Details |
| CERHYD | Centre de Recherche Pour La Valorisation des Hydrocarbures & Derives Algeria | | | | Details |
| CERP | Label Energy Peak Coherence, Receiver | | | | Details |
| CERS | Label Energy Peak Coherence, Receiver | | | | Details |
| CERT | certified | | | | Details |
| CERT | Code of First Echo Rise Time | | | | Details |
| Cert.ex. | Ceratobulimina eximia | | | | Details |
| CESC | Command Echo - SCAL-A | | | | Details |
| CEST | Central European Summer Time | | | | Details |
| CET | Cement Evaluation Tool | | | | Details |
| CET | Central European Time | | | | Details |
| CET | cement evaluation | | | | Details |
| CET | Cement Evaluation Log | | | | Details |
| CET | Cement Evaluation Tool | | | | Details |
| CET0 | Energy Peak Coherence, Transmitter Array - Slowness_Time_Coherence | | | | Details |
| CET1 | Label Energy Peak Coherence, Transmitter | | | | Details |
| CET2 | Label Energy Peak Coherence, Transmitter | | | | Details |
| CET3 | Label Energy Peak Coherence, Transmitter | | | | Details |
| CETEX | LABEL Energy Peak Coherence, Transmitter | | | | Details |
| CETP | Label Energy Peak Coherence, Transmitter | | | | Details |
| CETS | Label Energy Peak Coherence, Transmitter | | | | Details |
| CEU | (Certificate of) Continuing Education Units | | | | Details |
| CEU | Continuing Education Units | | | | Details |
| CEW1 | Compressional Energy of Waveform # 1 | | | | Details |
| CEW2 | Compressional Energy of Waveform # 2 | | | | Details |
| CEW3 | Compressional Energy of Waveform # 3 | | | | Details |
| CEW4 | Compressional Energy of Waveform # 4 | | | | Details |
| CEXP | External Pressure Sensor Calibrated Output Pressure | | | | Details |
| CF | Completion Fluid | | | | Details |
| CF | Carbolite Filter | | | | Details |
| CF | Casing flange elevation | | | | Details |
| CF | CONGO | | | | Details |
| CF | CENTRAL AFRICAN REPUBLIC | | | | Details |
| CF | casing flange | | | | Details |
| CF | clay filled | | | | Details |
| Cf | Cockfield | | | | Details |
| CF | cold finished | | | | Details |
| CF | Complexity Factor | | | | Details |
| CF | Clearance Factor | | | | Details |
| CF | Counter Flush (Sonde) | Shallow water wells drilled in Austria | | | Details |
| CF | cubic foot | | | | Details |
| CF | Cash Flow | | | | Details |
| CF | Chemical Flooding | | | | Details |
| CF | Condensate Field | | | | Details |
| CF | Continuous Fracture | | | | Details |
| CF OPEX | Operational Expenditures | | | | Details |
| CFA | Compositional Fluid Analizer | | | | Details |
| CFA | Chartered Financial Analyst | | | | Details |
| CFAC | Coal Facies | | | | Details |
| CFB&G | companion flange bolt and gasket | | | | Details |
| CFBO | companion flanges bolted on | | | | Details |
| CFC | Consumption of fixed capital | | | | Details |
| CFC | Central Frequency for Compressional | | | | Details |
| CFCF | cubic foot per cubic foot | | | | Details |
| CFCT | Cash Flow Cycle Time | | | | Details |
| CFD | Computational Fluid Dynamics | | | | Details |
| CFD | Caisse Française de Développement | | | | Details |
| Cfd | cubic foot per day | | | | Details |
| CFD | Compensated Formation Density | | | | Details |
| cfd | cubic feet per day | | | | Details |
| CFD | Contract for difference | | | | Details |
| CFD | Correction Factor of Deep Log | | | | Details |
| CFDC | Compensated Formation Density Caliper | | | | Details |
| CFDP | Conceptual Field Development Plan | | | | Details |
| CFE | core flow efficiency | | | | Details |
| CFE | contractor furnished equipment | | | | Details |
| CFE | ECS Capture Iron Relative Yield | | | | Details |
| CFEC | Corrected Far Epithermal Counts | | | | Details |
| CFF | Calliper Fullbore Flowmeter | | | | Details |
| CFG | Cubic feet of Natural Gas | | | | Details |
| cfg | cubic feet gas | | | | Details |
| CFG | Companie Francaise pour le Developpement de Geothermie et des Energies Nouvelles France | | | | Details |
| cfgd | cubic feet gas per day | | | | Details |
| cfgh | cubic feet gas per hour | | | | Details |
| CFH | cubic feet per hour | | | | Details |
| CFID | Correction Factor on ILD | | | | Details |
| CFIM | Correction Factor on ILM | | | | Details |
| CFIS | Corrected net far detector inelastic | | | | Details |
| CFL8 | Correction Factor on LL8 | | | | Details |
| CFM | Continuous Fracture Modeling | | | | Details |
| CFM | Flowmeter-Continuous | | | | Details |
| CFM | Cubic Feet per Minute | | | | Details |
| CFM | Continuous flowmeter | | | | Details |
| CFM | Companie Francaise du Methane France | | | | Details |
| CFM | Certified Financial Manager | | | | Details |
| CFM PFM | Continuous Flowmeter | | | | Details |
| CFMT | Flowmeter Type | | | | Details |
| CFN | Continuous Fracture Network | | | | Details |
| CFO | Chief Financial Officer|| | Chief Financial Officer | Chief Financial Officer | Directeur financier | Details |
| CFO | Chief Financial Officer | | | | Details |
| CFO | Chief Finanacial Officer / Finanzvorstand | | | | Details |
| CFOD | Circumferential Fluid Ohmic Drop | | | | Details |
| CFP | Compagnie Française des Pétroles | | | | Details |
| cfp | cubic feet per pound | | | | Details |
| CFP | Companie Francaise du Petroles (also Total) France | | | | Details |
| CFP | Counter Flush Protess | Shallow water wells drilled in Protess/Austria | | | Details |
| CFP | Chemical Flooding Process | | | | Details |
| CFPM | Cubic Feet per Minute | | | | Details |
| CFPP | cold filter plugging point | | | | Details |
| CFPR | cubic foot per radian | | | | Details |
| CFPS | Cash flow per share | | | | Details |
| CFR | Cost and FReight | | | | Details |
| CFR | critical flow rate | | | | Details |
| CFR | Code of Federal Regulations | | | | Details |
| CFR | cement friction reducer | | | | Details |
| CFR | cement friction retarder | | | | Details |
| CFR | Companie Francaise de Raffinage (sub. of Total) France | | | | Details |
| CFRC | Coordinating Fuel Research Committee | | | | Details |
| CFRE | Chopper Frequency | | | | Details |
| CFRQ | LOG of Frequency of the Cells used for the None | | | | Details |
| CFS | Caged Fullbore Flowmeter (in PLT tool) | | | | Details |
| cfs | cubic feet per second | | | | Details |
| CFS | Counter Flush Sonde | Shallow water wells drilled in Austria | | | Details |
| CFS | Consolidated Financial Statement | | | | Details |
| CFS | Circulate For Signature | | | | Details |
| CFS | Correction Factor of Shallow Log | | | | Details |
| CFST | Central Frequency of the Stoneley Wave | | | | Details |
| CFT | Cubic FeeT | | | | Details |
| CFT | Call For Tender | | | | Details |
| CFT | Caliper-Fullbore Temperature | | | | Details |
| CFTC | Commodity Futures Trading Commission | | | | Details |
| CFTC | Corrected Far Thermal Count Rate | | | | Details |
| CFVL | Memorized Fluid Acoustic Slowness | | | | Details |
| Cg | Compressibility of Gas|| | Compressibility of gas | Kompressibilität von Gas | Compressibilité de gaz | Details |
| CG | Contents Guideline | | | | Details |
| CG | Connection Gas | | | | Details |
| CG | CONGO, THE DEMOCRATIC REPUBLIC OF THE | | | | Details |
| CG | CONGO | | | | Details |
| CG | connection gas, mud logging term | | | | Details |
| cg | coarse grained | | | | Details |
| CG | Compensated Gamma | | | | Details |
| CG | center of gravity | | | | Details |
| cg | centigram | | | | Details |
| cg | coring | | | | Details |
| CG | corrected gravity | | | | Details |
| Cg | Compressibility of Gas | | | | Details |
| CG | Cushion Gas | | | | Details |
| CG | Klasse-C-Vorrat Gas (m3(Vn)-%) | Class C gas reserves | | | Details |
| CGA | Canadian Gas Association | | | | Details |
| CGA | Clean Gulf Associates | | | | Details |
| CGAI | Capture Gain for GST-A/IGT Spectrum | | | | Details |
| CGAS | Compressibility of Gas | | | | Details |
| CgASR | Coated-Grain, Algal, Skeletal Rudstone-Floatstone | | | | Details |
| CGD | ECS Capture Gadolinium Relative Yield | | | | Details |
| CGDN | Grain Density from Core | | | | Details |
| CGDN | Grain Density from Core | | | | Details |
| CGDT | Theoretical CGD Log | | | | Details |
| CGEL | CG EL Log | | | | Details |
| CGES | Center for Global Energy Studies | | | | Details |
| CGES | Centre for Global Energy StudiesUK | | | | Details |
| CGF | central gas facility | | | | Details |
| CGG | Compagnie Générale de Géophysique (a fully integrated Geoscience company providing leading geological, geophysical and reservoir capabilities) | | | | Details |
| CGG | Companie Generale de Geophysique France | | | | Details |
| CGI | Continuous Gas Injection | | | | Details |
| CGI | Cumulative Gas Injection | | | | Details |
| CGI | Crestal Gas Injection | | | | Details |
| CGIY | Correction of Gyro Imperfections on Y Axis Angular_Velocity | | | | Details |
| CGIZ | Correction of Gyro Imperfections on Z Axis Angular_Velocity | | | | Details |
| CGL | Core Gamma Log | | | | Details |
| CGL | CONGLOMERATE | | | | Details |
| Cglc | conglomeratic | | | | Details |
| cglt | conglomerate, conglomeritic | | | | Details |
| CGM | Custom Google Map | | | | Details |
| CGM | Computer Graphics Metaware | | | | Details |
| CGOC | Current Gas Oil Contact | | | | Details |
| CGP | Cumulative Gas Production | | | | Details |
| CGPH | Core Graph Log | | | | Details |
| CGPH | Capture Gamma Ray Porosity | | | | Details |
| CGR | Condensate gas ratio | | | | Details |
| CGR | Computed Gamma Ray | | | | Details |
| CGR | Uran_corrected gamma ray | | | | Details |
| CGR | Gamma Ray Contribution from Thorium and | | | | Details |
| CGR2 | TSGT Calibrated Gamma Ray | | | | Details |
| CGR2_SL | TSGT Calibrated Gamma Ray - Station Log | | | | Details |
| CGRA | Computed Gravitation | | | | Details |
| CGRI | Canadian Gas Research Institute | | | | Details |
| cgs | centimeter-gram-second-system | | | | Details |
| CGSA | Coarse-Grain Sandstone | | | | Details |
| CgSG | Coated-Grain, Skeletal Grainstone | | | | Details |
| CGTC | Columbia Gas Transmission Co. | | | | Details |
| CGTL | Compact Gas to liquids (production equipment small enough to fit on a ship) | | | | Details |
| CGU | Cash Generating Unit | | | | Details |
| CGV | Cushion Gas Volume | | | | Details |
| CGWC | Current Gas Water Contact | | | | Details |
| CH | Cased Hole | | | | Details |
| CH | CHINA | | | | Details |
| CH | SWITZERLAND | | | | Details |
| CH | Completion | | | | Details |
| CH | casinghead(gas) | | | | Details |
| ch | chert | | | | Details |
| ch | choke | | | | Details |
| CH | closed hole | | | | Details |
| CH | core hole | | | | Details |
| CH | Consession Holder | | | | Details |
| CH-OP | chain operated | | | | Details |
| CH1R | Current HP Additive #1 Flowrate | | | | Details |
| CH1V | Current HP Additive #1 Volume | | | | Details |
| CH4 | methane | | | | Details |
| CHAF | D2 Channel Flag | | | | Details |
| chal | chalcedony | | | | Details |
| CHAM | chamfer | | | | Details |
| CHAM | Circle Hole Angle Maximum | | | | Details |
| CHANNEL1 | Generic Unitless 1D Array | | | | Details |
| CHANNEL2 | Generic Unitless 1D Array | | | | Details |
| CHANNEL3 | Generic Unitless 1D Array | | | | Details |
| CHANNEL4 | Generic Unitless 1D Array | | | | Details |
| CHANNEL5 | Generic Unitless 1D Array | | | | Details |
| Chapp | Chappel | | | | Details |
| CHAR | characteristics | | | | Details |
| Char | Charles | | | | Details |
| Chatt | Chattanooga shale | | | | Details |
| CHC | Circulate Hole Clean | | | | Details |
| CHCNC | CHCNC Gamma Ray Casing Collar Locator | | | | Details |
| CHCU | Coherence computed uphole | | | | Details |
| CHD | closed hydrocarbon drain | | | | Details |
| CHDT | Cased Hole Dynamics Tester | | | | Details |
| CHDT | Cased Hole Dynamic Tester | | | | Details |
| CHDTP | Caliper HDT Playback Log | | | | Details |
| CHE | Casing HAndling Equipment | | | | Details |
| CHE | SWITZERLAND | | | | Details |
| CHE | Cable Head | | | | Details |
| CHE | Coherent Compressional Energy | | | | Details |
| CHECK | Checkshot and Acoustic Calibration Report | | | | Details |
| Chem | Chemical | | | | Details |
| chem. | chemical, chemist, chemistry | | | | Details |
| chem. | prod chemical products | | | | Details |
| Cher | Cherokee | | | | Details |
| Chert | a hard, silicate sedimentary rock Similar to flint, but with less ordered structure A cryptocrystalline form of quartz | | | | Details |
| chert | chert | | | | Details |
| Ches | Chester | | | | Details |
| CHES | Basic | | | | Details |
| CHESM | contractor, health, environment and safety management | | | | Details |
| CHESS | chemical hazard employee safety system | | | | Details |
| CHF | casinghead flange | | | | Details |
| CHF | Swiss Franc | | | | Details |
| CHF | Swiss Franc | | | | Details |
| CHF | Swiss franc | | | | Details |
| CHFF | Cased Hole Friction Factor | | | | Details |
| CHFP | Cased Hole Frac Pack | | | | Details |
| CHFR | Cased Hole Formation Resistivity | | | | Details |
| CHFR | Cased Hole Formation Resisitivity | | | | Details |
| CHFRTM | cased hole formation resistivity tool | | | | Details |
| CHFT | Cased Hole Dynamics Tester | | | | Details |
| CHFT | Cased Hole Formation Tester | | | | Details |
| CHG | casinghead gas | | | | Details |
| CHGP | Cased Hole Gravel Pack | | | | Details |
| CHH | Casing Head Hanger | | | | Details |
| CHH | Casing Head Housing | | | | Details |
| CHI | Chi-Square of Fit for NGT Counts | | | | Details |
| CHI1 | HNGS Detector 1 Chi-Squared | | | | Details |
| CHI1_MARQ | HNGS Detector 1 Marquardt Chi-Squared | | | | Details |
| CHI2 | HNGS Detector 2 Chi-Squared | | | | Details |
| CHI2_MARQ | HNGS Detector 2 Marquardt Chi-Squared | | | | Details |
| Chim-H | Chimney Hill | | | | Details |
| Chim-R | Chimney Rock | | | | Details |
| Chin | Chinle | | | | Details |
| Chini | General Company for Dinnerware | | | | Details |
| CHIR | Chirp Flag (1 if Shaker Data) | | | | Details |
| CHIS | CHI Square of Fit with respect to NGT | | | | Details |
| chit | chitin(ous) | | | | Details |
| CHK | choke | | | | Details |
| chk | chalk | | | | Details |
| CHK | Corrected hook load | | | | Details |
| Chkbd | checkerboard | | | | Details |
| chkd | checked | | | | Details |
| CHKD | PL checkered plate | | | | Details |
| CHKP | Choke Position | | | | Details |
| CHKS | back flow checks | | | | Details |
| CHKSR | Checkshot Survey Report | | | | Details |
| CHKSS | Checkshot Survey Log | | | | Details |
| CHKV | check valve | | | | Details |
| chky | chalky | | | | Details |
| CHL | CHILE | | | | Details |
| CHL | cased hole log | | | | Details |
| chl | chloride | | | | Details |
| chl | chloride(s) | | | | Details |
| chl | chloritic | | | | Details |
| chl | log chlorine long | | | | Details |
| CHL | Chlorinlog | | | | Details |
| CHL GR | Chlorinlog-Gamma Ray | | | | Details |
| CHL GR | Chlorinlog-Gamma Ray | | | | Details |
| Chlor | chloritic | | | | Details |
| CHLR | chlorinator | | | | Details |
| CHLR | Chlorite | | | | Details |
| CHMBR | chamber | | | | Details |
| CHMS | CPLT HP Gauge | | | | Details |
| CHN | CHINA | | | | Details |
| chng | change(ed)(ing) | | | | Details |
| CHNL | Channel Survey | | | | Details |
| CHNL | channel | | | | Details |
| Choc | chocolate | | | | Details |
| CHOKE | Choke size | | | | Details |
| CHOKE_SIZE | Wellhead choke diameter | | | | Details |
| CHOPS | Cold Heavy Oil Production with Sand | | | | Details |
| CHOPT | CHarterer's OPTion | | | | Details |
| Chou | Chouteau lime | | | | Details |
| CHP | Casing Hanger Pressure (pressure in an annulus as measured at the casing hanger) | | | | Details |
| CHP | Casing Hanger Pressure | | | | Details |
| CHP | combined heat and power | | | | Details |
| CHP | casinghead pressure | | | | Details |
| CHR | Surgutneftegas Russia | | | | Details |
| CHR0 | Label Peak Coherence, Receiver Array - SDT Slowness_Time_Coherence | | | | Details |
| CHR1 | Label Peak Coherence, Receiver Array - | | | | Details |
| CHR2 | Label Peak Coherence, Receiver Array - | | | | Details |
| CHR3 | Label Peak Coherence, receiver Array - | | | | Details |
| CHREX | LABEL Peak Coherence, Receiver Array - | | | | Details |
| chrg | charge(ed)(ing) | | | | Details |
| chrm | chairman | | | | Details |
| CHROM | Chromatolog | | | | Details |
| chromat | chromatograph | | | | Details |
| chrome | chromium | | | | Details |
| CHRP | Label Peak Coherence, Receiver Array, | | | | Details |
| CHRS | Label Peak Coherence, Receiver Array, | | | | Details |
| CHRT | casing hanger running tool | | | | Details |
| CHSC | Circle Hole Shape Condition | | | | Details |
| CHSO | Charaktristische Sonde | typical well | | | Details |
| cht | chart | | | | Details |
| cht | chert | | | | Details |
| CHT | Condensate hydrotreater | | | | Details |
| CHT0 | Label Peak Coherence, Transmitter Array - | | | | Details |
| CHT1 | Label Peak Coherence, Transmitter Array - | | | | Details |
| CHT2 | Label Peak Coherence, Transmitter Array - | | | | Details |
| CHT3 | Label Peak Coherence, Transmitter Array - | | | | Details |
| CHTEX | LABEL Peak Coherence, Transmitter Array - | | | | Details |
| CHTP | Label Peak Coherence, Transmitter Array, | | | | Details |
| CHTS | Label Peak Coherence, Transmitter Array, | | | | Details |
| chty | cherty | | | | Details |
| Chug | chugwater | | | | Details |
| CHUN | Calibrated Pressure Hundreds Digit | | | | Details |
| CHX | in hydrocarbon (CHx)n formula | | | | Details |
| CHY | ECS Capture Hydrogen Relative Yield | | | | Details |
| CI | Chemical Injection | | | | Details |
| CI | Competitive Intelligence | | | | Details |
| CI | Capital Intelligence | | | | Details |
| CI | Corrosion Inhibitor | | | | Details |
| CI | Cone Interference | | | | Details |
| CI | Capital Intensity | | | | Details |
| CI | CHILE | | | | Details |
| CI | COTE D'IVOIRE | | | | Details |
| CI | Casing Inspection/ Electro-Magnetic-Detector | | | | Details |
| CI | cast iron | | | | Details |
| CI | contour interval(map) | | | | Details |
| CI | engine compression-ignition engine | | | | Details |
| CI | Casing Inspection/Electro Magnetic-Detector | | | | Details |
| Ci | curie | | | | Details |
| CI | Corporate Identity | | | | Details |
| CI | Combustor Inspection | | | | Details |
| CI | Corrosion Inhibitor | | | | Details |
| CIA | Concentration In Air | | | | Details |
| CIA | Certified Internal Auditor | | | | Details |
| CIA6 | Corrected Average 6' Sampled Axial Current Electric_Current | | | | Details |
| CIAX | Corrected Average Axial Current | | | | Details |
| CIB | Commercial International Bank | | | | Details |
| Cib. | Cibicides | | | | Details |
| Cib.h. | Cibicides hazzardi | | | | Details |
| CIBHP | closed in bottom hole pressure | | | | Details |
| CIBP | cast iron bridge plug | | | | Details |
| CIBP | cast-iron bridge plug | | | | Details |
| CICHP | Closed In Casing Head Pressure | | | | Details |
| CID | Chemical Industries Development | | | | Details |
| CIDC | Casing/Pipe Inner Diameter | | | | Details |
| CIDL | chemical injection downhole lower | | | | Details |
| CIDL | Caliper Casing Inner Diameter Processed, | | | | Details |
| CIDP | Induction Deep Phasor Conductivity | | | | Details |
| CIDPP | Closed In Drill Pipe Pressure | | | | Details |
| CIDS | Caliper Casing Inner Diameter Processed, | | | | Details |
| CIDU | chemical injection downhole upper | | | | Details |
| CIE | crude industrial ethanol | | | | Details |
| CIED | International Center for Education and Development | | | | Details |
| CIEPSA | Compania de Investigacion y Exploraciones Petroliferas, S.A. Spain | | | | Details |
| CIF | Costs Insurance and Freight | | | | Details |
| CIF | Cost Insurance With Freight | | | | Details |
| CIIC | Commercial International Investment Company | | | | Details |
| CIIP | Condensate Initially In Place (Gas Cap/Res) | | | | Details |
| CIIP | Condensate Initially In Place | | | | Details |
| CIL | Conductivity Induction | | | | Details |
| CILB | Conductivity Induction Backup | | | | Details |
| CILD | Conduction Log | | | | Details |
| CILD | Deep Induction Conductivity | | | | Details |
| CILD | Calibrated Induction Deep Conductivity | | | | Details |
| CILM | Calibrated Induction Medium Conductivity | | | | Details |
| CIM | Chemical Injection Mandrel/Manifold | | | | Details |
| CIM | Canadian Institute of Mining | | | | Details |
| CIM | Canadian Institute of Mining, Metallurgy and Petroleum | | | | Details |
| CIM | Companie Industrielle Maritime France | | | | Details |
| Cima | Cimarron | | | | Details |
| CIMA | Chartered Institute of Management Accountants | | | | Details |
| CIMP | Induction Medium Phasor Conductivity | | | | Details |
| CIMS | Corrosion and Inspection Management System | | | | Details |
| CIMV | Chemical Injection Metering Valve | | | | Details |
| CIN | Common Interest Network (system on Shell Global Networks) | | | | Details |
| CINSA | Compania Insular del Nitrogena, S.A. Spain | | | | Details |
| CIO | Chief Information Officer | | | | Details |
| CIO | Chief Information Officer or Chief Investment Officer | | | | Details |
| CiO | Consumed in Operations | | | | Details |
| CIP | Cement In Place | | | | Details |
| CIP | Carriage and Insurance paid to..... | | | | Details |
| CIP | Chemical Injection Port (for textim pump) | | | | Details |
| CIP | closed-in pressure | | | | Details |
| CIPA | California Independent Petroleum Association | | | | Details |
| CIPCO | Caspian International Petroleum Company | | | | Details |
| CIPF | Central Injection Pump Facility | | | | Details |
| CIPS | Concentration in Process Stream | | | | Details |
| CIPS | Chartered Institute of Purchasing & Supply | | | | Details |
| CIPS | Close Internal Potential Survey | | | | Details |
| CIR | Circulate | | | | Details |
| cir | circle | | | | Details |
| cir | circuit | | | | Details |
| cir | circular | | | | Details |
| cir | mils circular mills | | | | Details |
| CIRC | circulate | | | | Details |
| circ | circulate, circulation, circulating | | | | Details |
| circ | circulate, circulating, circulation | | | | Details |
| CIRC | Casing/Pipe Nominal Inner Radius | | | | Details |
| CIRD | IRD Conductivity | | | | Details |
| CIRES | Companhia Industrial de Resinas Sinteticas Portugal | | | | Details |
| CIRF | RST Capture to Inelastic Ratio Far | | | | Details |
| CIRF_FIL | RST Capture to Inelastic Ratio Far | | | | Details |
| CIRM | IRM Conductivity | | | | Details |
| CIRN | RST Capture to Inelastic Ratio Near | | | | Details |
| CIRN_FIL | RST Capture to Inelastic Ratio Near | | | | Details |
| CIRP | Schlumberger's Completion Insertion and Retrieval under Pressure, (snap lock guns) | | | | Details |
| CIRR | Commercial Interest Reference Rate | | | | Details |
| CIRT | Circulating Time | | | | Details |
| CIS | Commonwealth of Independent States | | | | Details |
| CIS | Customer Instrument Service | | | | Details |
| Cis | Cisco | | | | Details |
| CIS | Customer Instrument Service | | | | Details |
| CISA | Certified Information Systems Auditor | | | | Details |
| CISO | Chief Information Security Officer | | | | Details |
| CIT | Casing Integrity Test | | | | Details |
| CIT | Casing Inspection Tool | | | | Details |
| CIT-OA | casing integrity test – outside annulus | | | | Details |
| CITHP | Closed In Tubing Head Pressure (tubing head pressure when the well is shut in) | | | | Details |
| CITHP | Closed In Tubing Hanger Pressure | | | | Details |
| CIV | Chemical Injection Valve | | | | Details |
| CIV | COTE D'IVOIRE | | | | Details |
| CIW | Cameron Iron Works | | | | Details |
| CIW | Concept Identific | | | | Details |
| CIWHP | closed in well head pressure | | | | Details |
| CIXD | IXD Conductivity | | | | Details |
| CIXM | IXM Conductivity | | | | Details |
| CJ | CAYMAN ISLANDS | | | | Details |
| CK | Cokriging | | | | Details |
| CK | COCOS (KEELING) ISLANDS | | | | Details |
| CK | COOK ISLANDS | | | | Details |
| ck | cake | | | | Details |
| ck | check | | | | Details |
| CK | ECS Capture Potassium Relative Yield | | | | Details |
| Ck-Mtn | Cook Mountain | | | | Details |
| CK90 | Measured Horizontal Permeability @ 90 | | | | Details |
| CKH | Horizontal Permeability from Core | | | | Details |
| CKH | Horizontal Permeability from Core | | | | Details |
| cksn | chicksan | | | | Details |
| CKT | Theoretical CK Log | | | | Details |
| CKTA | Central Kazakhstan Territorial Administration for Natural Resource Protection Kazakhstan | | | | Details |
| CKV | Vertical Permeability from Core | | | | Details |
| CKV | Vertical Permeability from Core | | | | Details |
| CKV | Vertical Permeability from Core | | | | Details |
| CL | Core Log | | | | Details |
| CL | Control Line (the hydraulic line for controling SSSV and chemical injection in completion) | | | | Details |
| CL | CORAL SEA ISLANDS | | | | Details |
| CL | CHILE | | | | Details |
| CL | control line | | | | Details |
| CL | Chloride | | | | Details |
| CL | Chlorine or Chlorinilog | | | | Details |
| CL | Salinity | | | | Details |
| CL | carload | | | | Details |
| cl | centiliter | | | | Details |
| CL | class | | | | Details |
| CL | Salinity | | | | Details |
| Cl | Clay | | | | Details |
| CL | Casing Leck | Casing Leak | | | Details |
| CL | US Crude Light | | | | Details |
| CL | Klasse-C-Vorrat Kondensat (Tonne-%) | Class C oil reserves | | | Details |
| CL | Course Length - Horizontal Drift of a | | | | Details |
| CL | Condensate Line | | | | Details |
| CL&F | Continental Land and Fur Co. | | | | Details |
| Cl2 | chlorine gas | | | | Details |
| Cl2 | chlorine | | | | 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 |
| CLAY | Clay | | | | Details |
| CLAY | Claystone Facies | | | | Details |
| CLC | Civil Liability Convention | | | | Details |
| CLc1 | US Crude Light contract (future contract) | | | | Details |
| CLDL | Chlorije Detection | | | | Details |
| CLDL | Chloride Detection | | | | Details |
| Cleve | Cleveland | | | | Details |
| CLEX | Cluster/Expansion | | | | Details |
| Clfk | Clearfork | | | | Details |
| CLFL | Choke Line Friction Losses | | | | Details |
| CLFP | choke line friction pressureClinker | | | | Details |
| CLFP | Choke and Kill Line Friction Pressures (also used for Choke Line Friction Pressures) | | | | Details |
| CLFR | clarifier | | | | Details |
| CLG | Core Log and Graph | | | | Details |
| CLG | cooling | | | | Details |
| CLG/TWR | cooling tower | | | | Details |
| CLGB | Credit Lyonnais Global Banking | | | | Details |
| CLH | Compania Logistica de Hidrocarburos S.A. Spain | | | | Details |
| Cliff-H | Cliff House | | | | Details |
| CLKG | caulking | | | | Details |
| CLL | Cluster Lead | | | | Details |
| CLL8 | Laterolog 8 Conductivity | | | | Details |
| CLLD | Laterolog Deep Conductivity | | | | Details |
| CLMP | canvas-lined metal petal basket | | | | Details |
| cln(d)(g) | clean(ed)(ing) | | | | Details |
| ClO2 | chlorine dioxide, a powerful biocide that dissolves biomass cell walls It is nearly impossible for bacteria to develop immunity against ClO2 | | | | Details |
| CLOS | Closure: horizontal distance from origin | | | | Details |
| Clov | clovery | | | | Details |
| CLP | Chilean Peso | | | | Details |
| CLP | Cumulative Liquid Production | | | | Details |
| CLP | Classification, Labeling and Packaging | | | | Details |
| CLQ | Central Living Quarters | | | | Details |
| clr | clear | | | | Details |
| clr | clear, clearance | | | | Details |
| CLR | cooler | | | | Details |
| CLR/TWR | cooling tower | | | | Details |
| CLRC | Career Ladder Review Committee | | | | Details |
| clrg | clearing | | | | Details |
| CLRP | Color Plot Continuous | | | | Details |
| CLRP | Corrected Lower Reference Phase | | | | Details |
| CLSA | Closure angle | | | | Details |
| clsd | closed | | | | Details |
| CLSD | The distance in a straight line and | | | | Details |
| CLSSM | Compensated Long Spaced Sonic MultiLink | | | | Details |
| CLST | Clay Stone | | | | Details |
| CLT | Central Limit Theorem | | | | Details |
| CLTR | collector | | | | Details |
| Clu | Sondencluster | well cluster | | | Details |
| CLU1 | Cluster Index from Parsel Pass 1 | | | | Details |
| CLU2 | Cluster Index from Parsel Pass 2 | | | | Details |
| Clut | calcilutite | | | | Details |
| cly | clay | | | | Details |
| Clye | clayey | | | | Details |
| Clyst | Claystone | | | | Details |
| clystn | clavstone | | | | Details |
| Cm | Compaction Coefficient | | | | Details |
| CM | Choke Module | | | | Details |
| CM | Choke Manifold | | | | Details |
| CM | Condition Mud | | | | Details |
| CM | CAMEROON | | | | Details |
| cm | centimeter | | | | Details |
| CM | Corrective Maintenance | | | | Details |
| cm/a | centimeter per year | | | | Details |
| CM/M | centimeter per minute | | | | Details |
| CM/S | centimeter per second | | | | Details |
| cm/s | centimeter per second | | | | Details |
| cm/sec | centimeters per second | | | | Details |
| CM/Y | centimeter per year | | | | Details |
| CM1A | Raw Amplitude of First Echo | | | | Details |
| CM2 | square centimeter | | | | Details |
| cm2 | square centimeter | | | | Details |
| cm2/s | square centimeter per second | | | | Details |
| CM2A | Raw Amplitude of Second Echo | | | | Details |
| cm3 | cubic centimeter | | | | Details |
| cm3/cm3 | cubic centimeter per cubic centimeter | | | | Details |
| cm3/h | cubic centimeter per hour | | | | Details |
| cm3/min | cubic centimeter per minute | | | | Details |
| cm3/s | cubic centimeter per second | | | | Details |
| CMA | Capital Markets Authority | | | | Details |
| CMA | acoustic caliper | | | | Details |
| CMA | Certified Management Accountant | | | | Details |
| CMAX | Raw CCL Maximum Amplitude | | | | Details |
| CMB | Channel Mouth Bar | | | | Details |
| CMBC | Medium Induction Borehole Corrected | | | | Details |
| CMBD | Resistivity Medium Button down from RAB | | | | Details |
| CMBU | Resistivity Medium Button up from RAB | | | | Details |
| CMC | carboxy methyl cellulose | | | | Details |
| CMC | sodium carboxymethylcellulose | | | | Details |
| CMC | Crown Mounted Compensators | | | | Details |
| CMC | Cose Mush Chal kardan | | | | Details |
| Cmchn | comanchean | | | | Details |
| CMCR | Medium Induction Electronic Calibrated | | | | Details |
| CMCs | Crown Mounted Compensators | | | | Details |
| CMCX | Medium Induction Electronic Calibrated | | | | Details |
| CMDB | Configuration Management Database | | | | Details |
| CMDV | Coring Motor Downhole Voltage | | | | Details |
| CMDV_DL | Coring Motor Downhole Voltage | | | | Details |
| CMEB | Medium Induction Enhanced Borehole | | | | Details |
| CMER | Medium Induction Enhanced Resolution | | | | Details |
| CMF | Combined Meter Factor | | | | Details |
| CMF | Choke Manifold | | | | Details |
| CMFB | Committee on monetary, finance and balance of payments statistics | | | | Details |
| CMFF | CMR Free Fluid | | | | Details |
| CMFF_MW | CMR Free Fluid - Multi Wait | | | | Details |
| CMFF_MW_SIG | Standard Deviation of CMR Free Fluid - | | | | Details |
| CMFF_MW_SL | CMR Free Fluid - Multi Wait - Station Log | | | | Details |
| CMFF_SIG | Standard Deviation of CMR Free Fluid | | | | Details |
| CMFF_SIG_SL | Standard Deviation of CMR Free Fluid - | | | | Details |
| CMFF_SL | CMR Free Fluid - Station Log | | | | Details |
| CMHD | HNGS Coincidence Message Header | | | | Details |
| CMHPG | carboxy methyl, hydroxyl propyl cellulose | | | | Details |
| CMHR | Conductivity Medium Induction HiRes Phasor Medium_Induction_Conductivity | | | | Details |
| CMHZ | AGS Coincidence Message Header | | | | Details |
| CMIN | Raw CCL Minimum Amplitude | | | | Details |
| CMJ | cement job | | | | Details |
| CMJD | HNGS Coincidence Message Job Depth | | | | Details |
| CMJT | HNGS Coincidence Message Job Time | | | | Details |
| CML | Condition Monitoring Location | | | | Details |
| CML | Channelmaster | | | | Details |
| CML N | Channelmaster-Neutron | | | | Details |
| CMLL | MLL Conductivity | | | | Details |
| CMLP | Coring Motor Linear Position | | | | Details |
| CMLP_DL | Coring Motor Linear Position | | | | Details |
| CMLR | Medium Induction Test-loop Calibrated Real Medium_Induction_Conductivity | | | | Details |
| CMLX | Medium Induction Test-loop Calibrated Quad Medium_Induction_Conductivity | | | | Details |
| CMM | Corporate Management Manual | | | | Details |
| CMMS | Computerized Maintenance Management Framework | | | | Details |
| CMO | Chief Marketing Officer | | | | Details |
| CMOP | Choke Manifold Operating Pressure | | | | Details |
| CMP | Common Midpoint (geophysics) | | | | Details |
| CMP | Common Mid Point | | | | Details |
| CMP | compressional | | | | Details |
| CMP | Critical Mud Pressure | | | | Details |
| CMPARTR | comparator | | | | Details |
| CMPD | compound | | | | Details |
| CMPL | Completion | | | | Details |
| CMPR | cubic meter per radian | | | | Details |
| Cmpt | compact | | | | Details |
| CMPT | Centre for Marine & Petroleum Technology UK | | | | Details |
| CMR | Combinable Magnetic Resonance (Schlumberger NMR type logging tool) | | | | Details |
| CMR | CMR Log | | | | Details |
| CMR | Combinable Magnetic Resonance | | | | Details |
| CMR | CAMEROON | | | | Details |
| CMR | Combinable Magnetic Resonance Tool | | | | Details |
| CMR | Caliper Minus Reference | | | | Details |
| CMRM | Medium Induction Response Matched | | | | Details |
| CMRP | CMR Porosity | | | | Details |
| CMRP_MW | CMR Porosity - Multi Wait | | | | Details |
| CMRP_MW_SIG | Standard Deviation of CMR Porosity - Multi Standard_Deviation | | | | Details |
| CMRP_MW_SL | CMR Porosity - Multi Wait - Station Log | | | | Details |
| CMRP_SIG | Standard Deviation of CMR Porosity | | | | Details |
| CMRP_SIG_SL | Standard Deviation of CMR Porosity - | | | | Details |
| CMRP_SL | CMR Porosity - Station Log | | | | Details |
| CMR_GAIN | CMR System Gain | | | | Details |
| CMR_GAIN_SL | CMR System Gain - Station Log | | | | Details |
| CMS | Corporate Management System | | | | Details |
| CMS | carboxy methyl starch | | | | Details |
| CMS | continuous monitoring system | | | | Details |
| CMSF | Micro SFL Conductivity | | | | Details |
| CMSN | CMR Signal To Noise Ratio | | | | Details |
| CMSN_SL | CMR Signal To Noise Ratio - Station Log | | | | Details |
| CMSP | coastal and marine spatial planning | | | | Details |
| CMSS | (cubic meter per second) per (cycle per second) | | | | Details |
| Cmt | Cement | | | | Details |
| cmt | cemented/cement | | | | Details |
| CMT | Circumferential Microsonic Tool | | | | Details |
| CMTD | cable mounted tension device | | | | Details |
| Cmtd | cemented | | | | Details |
| CMVB | Medium Induction Very Enhanced Borehole | | | | Details |
| CMVR | Medium Induction Very Enhanced Resolution | | | | Details |
| CMW | Connected Mobile Worker | | | | Details |
| CMW1 | Maximum of Compressional Spectrum for | | | | Details |
| CMW2 | Maximum of Compressional Spectrum for | | | | Details |
| CMW3 | Maximum of Compressional Spectrum for | | | | Details |
| CMW4 | Maximum of Compressional Spectrum for | | | | Details |
| CMZD | AGS Coincidence Message Job Depth | | | | Details |
| CMZT | AGS Coincidence Message Job Time | | | | Details |
| CN | Compensated Neutron Log | | | | Details |
| CN | CANADA | | | | Details |
| CN | COMOROS | | | | Details |
| CN | CANADA | | | | Details |
| CN | CHINA | | | | Details |
| CN | cetane number | | | | Details |
| CN | Class Number | | | | Details |
| CN | Compensated Neutron Log | | | | Details |
| CN/BD | control building | | | | Details |
| CNA | Capture Sodium | | | | Details |
| CNACG | China National Administration of Coal Geology China | | | | Details |
| CNC | Caliper corrected compensated Neutron Porosity | | | | Details |
| CNCF | Field Normalized Compensated Neutron Porosity | | | | Details |
| CNCF | field-normalised compensated neutron porosity | | | | Details |
| cncn | concentric | | | | Details |
| CND | Compensated Neutron Density | | | | Details |
| CND | conduit | | | | Details |
| CND | Corbon Number Distillation | | | | Details |
| CNDL | Compensated Neutron Density | | | | Details |
| CNDTN | condition | | | | Details |
| CNEC | Corrected Near Epithermal Counts | | | | Details |
| CNF | Confirmation | | | | Details |
| CNF1 | Correlation Normalize Factor D1 | | | | Details |
| CNF2 | Correlation Normalize Factor D2 | | | | Details |
| CNF3 | Correlation Normalize Factor D3 | | | | Details |
| CNF4 | Correlation Normalize Factor D4 | | | | Details |
| CNF5 | Correlation Normalize Factor D5 | | | | Details |
| CNF6 | Correlation Normalize Factor D6 | | | | Details |
| CNF7 | Correlation Normalize Factor D7 | | | | Details |
| CNF8 | Correlation Normalize Factor D8 | | | | Details |
| CNFDP | CNFD True Vertical Depth Playback Log | | | | Details |
| CNFS | Square Root of Surface Waveform | | | | Details |
| CNG | Compressed Natural Gas www.coselle.com | | | | Details |
| CNG | Compressed Natural Gas | | | | Details |
| CNG | Consolidated Natural Gas Supply Company | | | | Details |
| CNGP | CNG Producing Committee | | | | Details |
| CNGR | Compensated Neutron Gamma Ray Log | | | | Details |
| CNI | Conoco Norway Norway | | | | Details |
| CNIS | Corrected net near detector inelastic | | | | Details |
| CNK1 | Correlation Normalization Factor K Axis | | | | Details |
| CNK2 | Correlation Normalization Factor K Axis | | | | Details |
| CNK3 | Correlation Normalization Factor K Axis | | | | Details |
| CNK4 | Correlation Normalization Factor K Axis | | | | Details |
| CNK5 | Correlation Normalization Factor K Axis | | | | Details |
| CNL | Compensated Neutron Log | | | | Details |
| CNl | Compensated Neutron log Messung | | | | Details |
| CNL | Compensated Neutron Log. | | | | Details |
| CNL | compensated neutron log Radioactive neutron source bombards the formation with high energy neutrons, which are slowed and captured by atoms of the formation The low energy neutrons are reflected back to the tool and counted The amount of neutrons returning is inversely proportional to the porosity of the formation | | | | Details |
| cnl | Contour | | | | Details |
| CNLC | China National Logging Company | | | | Details |
| CNLFD | CNL/FDC Log | | | | Details |
| CNLOPB | Canada-Newfoundland and Labrador Offshore Petroleum Board | | | | Details |
| CNLP | Compensated Neutron Log Porosity | | | | Details |
| CNLSC | CN Long Space Counts | | | | Details |
| CNOC | China National Oil Company | | | | Details |
| CNODC | China National Oil & Gas Exploration & Development Corp. (see CSPC) China | | | | Details |
| CNOOC | China National Offshore Oil Corporation China | | | | Details |
| CNP | Compensated Neutron Porosity | | | | Details |
| CNP | Compensated Neutron Log Porosity | | | | Details |
| CNPC | China National Petroleum Corporation | | | | Details |
| CNPC | China National Petroleum Corporation China | | | | Details |
| CNPH | Corrected Neutron Porosity | | | | Details |
| CNPOR | CN selected Porosity | | | | Details |
| CNPORU | CN Limestone Porosity uncorrected | | | | Details |
| CNR | Conditioning Run | | | | Details |
| CNR | corner | | | | Details |
| CnR | Conclusion and Recommendation | | | | Details |
| CNRAT | CN Ratio | | | | Details |
| CnRs | Conclusions and Recommendations | | | | Details |
| CNS | Central North Sea | | | | Details |
| CNS | Compensated Neutron Service | | | | Details |
| CNSI | Conoco North Sea Inc. Norway | | | | Details |
| CNSOPB | Canada Nova Scotia Offshore Petroleum Board | | | | Details |
| CNSOPB | Canada-Nova Scotia Offshore Petroleum Board | | | | Details |
| CNSSC | CN Short Space Counts | | | | Details |
| CNT | Compensated Neutron Tool | | | | Details |
| CNT | Compensated Neutron | | | | Details |
| CNT | Geochemical Log | | | | Details |
| cnt | CPS-3 Contour | | | | Details |
| CNT | Roller Centraliser | | | | Details |
| CNT | Compensated Neutron Tool | | | | Details |
| CNT-A/H | Compensated Neutron Log | | | | Details |
| CNT-G | Dual-Energy Neutron Log | | | | Details |
| CNTC | Corrected Near Thermal Count Rate | | | | Details |
| cntf | centrifuge | | | | Details |
| cntl | control(s) | | | | Details |
| CNTN | containment | | | | Details |
| cntr | center(d) | | | | Details |
| cntr | container | | | | Details |
| cntr | controller | | | | Details |
| CNTS | Slim Compensated Neutron Tool | | | | Details |
| CNTS | count | | | | Details |
| CNTWT | counter weight | | | | Details |
| Cnty | county | | | | Details |
| CNUM | Core Number | | | | Details |
| cnvr | conveyor | | | | Details |
| CNX1 | Correlation Normalization Factor X Axis | | | | Details |
| CNX2 | Correlation Normalization Factor X Axis | | | | Details |
| CNX3 | Correlation Normalization Factor X Axis | | | | Details |
| CNX4 | Correlation Normalization Factor X Axis | | | | Details |
| CNX5 | Correlation Normalization Factor X Axis | | | | Details |
| cnxns | connections | | | | Details |
| CNY | Yuan Renminbi | | | | Details |
| CNY | Chinese yuan renminbi | | | | Details |
| CNY1 | Correlation Normalization Factor Y Axis | | | | Details |
| CNY2 | Correlation Normalization Factor Y Axis | | | | Details |
| CNY3 | Correlation Normalization Factor Y Axis | | | | Details |
| CNY4 | Correlation Normalization Factor Y Axis | | | | Details |
| CNY5 | Correlation Normalization Factor Y Axis | | | | Details |
| CNZ1 | Correlation Normalization Factor Z Axis | | | | Details |
| CNZ2 | Correlation Normalization Factor Z Axis | | | | Details |
| CNZ3 | Correlation Normalization Factor Z Axis | | | | Details |
| CNZ4 | Correlation Normalization Factor Z Axis | | | | Details |
| CNZ5 | Correlation Normalization Factor Z Axis | | | | Details |
| Co | Compressibility of Oil|| | Compressibility of Oil | Kompressibilität von Öl | Compressibilité du pétrole | Details |
| CO | change out (ex. from rod equipment to casing equipment) | | | | Details |
| CO | COLOMBIA | | | | Details |
| CO | circulate out, mud logging term | | | | Details |
| CO | carbon monoxide | | | | Details |
| Co | cobalt | | | | Details |
| CO | Colorado | | | | Details |
| Co | Company | | | | Details |
| co | clean out or cleaning out | | | | Details |
| CO | Carbon Dioxide | | | | Details |
| CO | carbon oxygen | | | | Details |
| CO | circulated out | | | | Details |
| CO | clean out | | | | Details |
| CO | cleaning out, cleaned out | | | | Details |
| CO | crude oil | | | | Details |
| CO | Controlling | | | | Details |
| Co | Compressibility of Oil | | | | Details |
| CO | Klasse-C-Vorrat Öl (Tonne-%) | Class C oil reserves | | | Details |
| CO | Controlling | | | | Details |
| CO | Cobalt | | | | Details |
| CO | Cost Owner / KostenVerantwortlicher | | | | Details |
| CO & S | clean out & shoot | | | | Details |
| co-op | cooperative | | | | Details |
| Co. | Op. company operated | | | | Details |
| Co. | Op. S.S. company-operated service stations | | | | Details |
| CO2 | Carbon Dioxide | | | | Details |
| CO2e | carbon dioxide equivalent | | | | Details |
| COA | Contract Of Affreightment | | | | Details |
| CoA | Chart of Accounts | | | | Details |
| COA | Chart of Account | | | | Details |
| COACP | Contract Of Affreightment Charter Party | | | | Details |
| Coal | sedimentary rock, often highly naturally fractured, composed of thermally modified plant remains | | | | Details |
| COAL | Coal | | | | Details |
| cob | Close Of Business (day) | | | | Details |
| COB | Close of Business | | | | Details |
| COB | Close of business | | | | Details |
| COB | Close of Business | | | | Details |
| COB | Close of Business | | | | Details |
| COBD | Conventional Overbalanced Drilling | | | | Details |
| COBIT | Bit conductance, oil based mud | | | | Details |
| COBLDN | Closing Of Business LoDoN | | | | Details |
| COBOL | Common Business Oriented Language | | | | Details |
| COBOL | Common Business-Oriented Language | | | | Details |
| CoC | Code of Conduct | | | | Details |
| COC | Certificate of Conformance | | | | Details |
| COC | Cleveland open cup | | | | Details |
| COCHIME | Companie Chimique de la Mediterranee France | | | | Details |
| Coco | Coconino | | | | Details |
| COD | coefficient of determination|| | coefficient of determination | Bestimmtheitsmaß | coefficient de détermination | Details |
| COD | Cash On Delivery | | | | Details |
| COD | Chemical Oxygen Demand | | | | Details |
| COD | CONGO, THE DEMOCRATIC REPUBLIC OF THE | | | | Details |
| COD | Carbon Dioxide Deepening | | | | Details |
| Cod | Codell | | | | Details |
| COD | coefficient of determination | | | | Details |
| COD | Casing Outer Diameter | | | | Details |
| CODC | Casing/Pipe Outside Diameter | | | | Details |
| CODEC | COder DECoder | | | | Details |
| CODEC | COnsistent DECisions | | | | Details |
| CODESSAS | Cia. Operadora de Estaciones de Servicio S.A. de CV Mexico | | | | Details |
| COE | Center Of Excellence | | | | Details |
| COE | controllable operating expense | | | | Details |
| COE | Corps of Engineers | | | | Details |
| CoED | Chance of Economical Development | | | | Details |
| coef | coefficient | | | | Details |
| COEF | Delta-T MIN Coefficient used in the Drift | | | | Details |
| COEFF | Coefficient | | | | Details |
| COET | Cost Estimation Team | | | | Details |
| COF | Cost of Failure|| | Cost of Failure | Kosten des Scheiterns | Coût de l'échec | Details |
| CoF | Certificate of Fitness (final part of medical check) | | | | Details |
| COF | Coefficient of Fraction | | | | Details |
| COF | calculated open flow | | | | Details |
| COF | calculated open flow(potential) | | | | Details |
| COF | Cost of Failure | | | | Details |
| COF | Consequence of Failure | | | | Details |
| COFCAW | a tertiary recovery mechanist consisting of combustion and water flooding | | | | Details |
| COFF | Command Echo, Casing Anomaly Locator | | | | Details |
| COFR | Connection Oil Flow Rate | | | | Details |
| COG | CONGO | | | | Details |
| COG | coke oven gas | | | | Details |
| COGA | Colorado Oil & Gas Association | | | | Details |
| Cogec | Costieri Genovesi Petroliferi | | | | Details |
| COGEH | Canadian Oil and Gas Evaluation Handbook | | | | Details |
| COGI | Canada Oil & Gas International | | | | Details |
| COGS | Cost of Goods Sold | | | | Details |
| COGSA | Carriage of Goods by Sea Act | | | | Details |
| COH | With Openhole Data Included | | | | Details |
| COH(SLO,TIMEINT) | slowness time coherence | | | | Details |
| COH1 | Value of Coherence at Frequency 1 | | | | Details |
| COH2 | Value of Coherence at Frequency 2 | | | | Details |
| COH3 | Value of Coherence at Frequency 3 | | | | Details |
| COH4 | Value of Coherence at Frequency 4 | | | | Details |
| COHC | Coherence Value at Compressional Peak | | | | Details |
| Cohesv | cohesive | | | | Details |
| COHS | Coherence Value at Shear Peak | | | | Details |
| COIL | Compressibility of Oil | | | | Details |
| COIR | Coloration of Reference | | | | Details |
| COK | COOK ISLANDS | | | | Details |
| COL | Collar Log | | | | Details |
| COL | Cost Of Living | | | | Details |
| COL | COLOMBIA | | | | Details |
| COL | collar | | | | Details |
| COL | colored | | | | Details |
| COL | column | | | | Details |
| Col | ASTM Color American Standard Test Method | | | | Details |
| Col | color | | | | Details |
| COLA | Cost of Living Allowance | | | | Details |
| Cole | Jct Coleman Junction | | | | Details |
| coll | collect(ed)(ing)(ion) | | | | Details |
| Colloq | Colloquial (means informal) | | | | Details |
| COLPET | Colombian Petroleum Co. Colombia | | | | Details |
| colr | collar | | | | Details |
| COM | Chance Of Maturation|| | Chance Of Maturation | Chance Reife | Chance Of Maturation | Details |
| COM | Completion | | | | Details |
| COM | COMOROS | | | | Details |
| Com | Comanche | | | | Details |
| Com | Comatula | | | | Details |
| com | common | | | | Details |
| Com | Pk Comanche Peak | | | | Details |
| COM | Chance Of Maturation | | | | Details |
| COM | Communications | | | | Details |
| CoM | Chance of Maturation | | | | Details |
| Com AVL | Compensated Acoustic Velocity Log | | | | Details |
| Com AVL-G | Compensated Acoustic Velocity | | | | Details |
| Com AVL-N | Compensated Acoustic Velocity | | | | Details |
| Com Den | Compensated Density | | | | Details |
| Com Den-GR | Compensated Density Gamma Ray | | | | Details |
| COMAN | Compositional Analysis | | | | Details |
| comb | combined, combination | | | | Details |
| COMB | combustion | | | | Details |
| COMESA | Cie. Mexicana de Exploraciones S.A. Mexico | | | | Details |
| COMGAS | Companhia de Gas de Sao Paolo Brazil | | | | Details |
| COML | Compaction Log | | | | Details |
| coml | commercial | | | | Details |
| Comm | community, communitized | | | | Details |
| comm | commenced | | | | Details |
| comm | commission | | | | Details |
| comm | communication | | | | Details |
| comm | community | | | | Details |
| COMMEGO | Committee on Geology & Mineral Resources Bulgaria | | | | Details |
| commr | commissioner | | | | Details |
| COMP | Composite Log | | | | Details |
| Comp | complete, completion, completed | | | | Details |
| comp | complete(ed)(tion) | | | | Details |
| comp | nat completed natural | | | | Details |
| Comp | Compartment | | | | Details |
| compnts | components | | | | Details |
| COMPR | Completion Program Report | | | | Details |
| compr | compressor | | | | Details |
| compr | st compressor station | | | | Details |
| compt | compartment | | | | Details |
| COMPT | components | | | | Details |
| COMPTR | computer | | | | Details |
| COMPU | Computest Report | | | | Details |
| COMP_BUCKLING | The computed critical buckling load that | | | | Details |
| COMP_TENSION | The computed tension in the drill string | | | | Details |
| COMP_TORQUE | The computed torque on the drillstring | | | | Details |
| COMRE | Completion Record Log | | | | Details |
| COMT | comment | | | | Details |
| COMUT | commutator | | | | Details |
| CON | Condensate | | | | Details |
| con | consolidated | | | | Details |
| CON | Conductivitty | | | | Details |
| Con Dr. | Continuous Drift | | | | Details |
| conc | concentrate | | | | Details |
| conc | concentric | | | | Details |
| conc | concrete | | | | Details |
| CONCAWE | Conservation of Clean Air and Water in Europe | | | | Details |
| CONCAWE | Oil companies’ European organization for environment, health and safety Belgium | | | | Details |
| conch | conchoidal | | | | Details |
| concl | conclusion | | | | Details |
| cond | condensate | | | | Details |
| cond | condition(ed)(ing) | | | | Details |
| COND | Fluid Conductivity | | | | Details |
| CONDE | Condensate Analysis Report | | | | Details |
| Condns | condensate | | | | Details |
| CONDR | Continuous Directional Log | | | | Details |
| condr | conductor ( csq) | | | | Details |
| condr | conductor(pipe) | | | | Details |
| condt | conductivity | | | | Details |
| CONE | Calibrated Pressure Ones Digit | | | | Details |
| conf | confidential | | | | Details |
| conf | confirm(ed)(ing) | | | | Details |
| confl | conflict | | | | Details |
| cong | conglomerate(itic) | | | | Details |
| CONG | Conglomerate Facies | | | | Details |
| congl | conglomerate (itic) | | | | Details |
| congl | conglomerate | | | | Details |
| CONL | Contact | | | | Details |
| conn | connection | | | | Details |
| cono | conodonts | | | | Details |
| CONOCO | Continental Oil Co. | | | | Details |
| Cons | consolidated | | | | Details |
| consol | consolidated | | | | Details |
| CONSPAIN | Continental Oil Co. of Spain (Conoco Espanola, S.A.) Spain | | | | Details |
| const | constant | | | | Details |
| const | construction | | | | Details |
| CONST | Constant | | | | Details |
| consv | conserve, conservation | | | | Details |
| CONT | CONTainer | | | | Details |
| Cont | Contact Caliper | | | | Details |
| cont(d) | continue(ed) | | | | Details |
| contam | contaminated, contamination | | | | Details |
| contd | continued | | | | Details |
| Contr | contractor | | | | Details |
| contr | resp contractor responsibility | | | | Details |
| contrib | contribution | | | | Details |
| conv | converse | | | | Details |
| Conv | convolute | | | | Details |
| CONVT | convector, convection | | | | Details |
| COO | Chief Operating Officer|| | Chief Operating Officer | Chief Operating Officer | Chief Operating Officer | Details |
| COO | Chief Operating Officer | | | | Details |
| COOH | coming out of hole | | | | Details |
| COOP | Societe Cooperative Des Petroles Egypt | | | | Details |
| coord | coordinates | | | | Details |
| coord | coordinate | | | | Details |
| COORD | Coordinate | | | | Details |
| COP | Communitee Of Practice | | | | Details |
| COP | Custom Of Port | | | | Details |
| COP | crude oil purchasing | | | | Details |
| COP | Colombian Peso | | | | Details |
| COP | Cease Of Production | | | | Details |
| COP | Close Of Play | | | | Details |
| COP | Colombian peso | | | | Details |
| COP | Community of Practice | | | | Details |
| CoP | Community of Practice | | | | Details |
| COP | Cumulative Oil Production | | | | Details |
| COPAREX | Companie de Participations, de Recherches et d’Exploitations Petrolieres France | | | | Details |
| COPAS | Council of Petroleum Accountants Society | | | | Details |
| COPs | Codes of Practice | | | | Details |
| coq | coquina | | | | Details |
| COR | Coring Run | | | | Details |
| cor | corner | | | | Details |
| COR | Carbon Dioxide Redrill | | | | Details |
| COR | Carbon/Oxygen Ratio | | | | Details |
| COR | Cost Optimization Review | | | | Details |
| Cor Det | Electro-Magnetic Corrosion Detector | | | | Details |
| CORAL | Cost Reduction Alliance Malaysia | | | | Details |
| CORAN | Core Analysis Report | | | | Details |
| CORC | Cairo Oil Refining Company Egypt | | | | Details |
| CORC | Casing/Pipe Nominal Outer Radius | | | | Details |
| CORCO | Commonwealth Oil Refining Co., Inc. | | | | Details |
| CORE | Core Report | | | | Details |
| CORG | Corgun Log | | | | Details |
| CORIB | Coriband Log | | | | Details |
| CORL | Correlation | | | | Details |
| CORLG | Correlation Log | | | | Details |
| COROR | Core Orientation Report | | | | Details |
| Corp | corporation | | | | Details |
| corr | corrected, correction | | | | Details |
| corr | correct(ed)(ion) | | | | Details |
| corr | corrosion | | | | Details |
| corr | corrugated | | | | Details |
| CORR | Correlation Log | | | | Details |
| correl | correlation, correlated | | | | Details |
| correl | correlation | | | | Details |
| corres | correspondence | | | | Details |
| CORS | Canadian Operational Research Society | | | | Details |
| CORT | Corrected Time tics (WST) | | | | Details |
| COR_PEAK | Correlation Peaks Generated by Correlate | | | | Details |
| COS | Class of Service | | | | Details |
| COS | Canadian Oil Sands | | | | Details |
| COS | Call Out Service | | | | Details |
| COS | carbonyl sulfide | | | | Details |
| COS | Chance of Success | | | | Details |
| COSA | Crude Oil Sales Agreement | | | | Details |
| COSH | hyperbolic cosine | | | | Details |
| COSHH | Control of Substances Hazardous to Health | | | | Details |
| COSMO | Japan | | | | Details |
| COST | Coherence Value at Stoneley Peak | | | | Details |
| COTD | cleaned out to total depth | | | | Details |
| COTH | hyperbolic cotangent | | | | Details |
| Cott | G Cottage Grove | | | | Details |
| Counc | G Council Grove | | | | Details |
| COVA | Netherlands National Petroleum Stockpiling Agency (Stichting Centraal Orgaan Voorraadvorming Aardolieprodukten) Netherlands | | | | Details |
| COVA | Covariance | | | | Details |
| COW | Crude Oil Washing (for oil pollution recovery from the ocean) | | | | Details |
| COW | Crude Oil Washing | | | | Details |
| COWC | Current Oil Water Contact | | | | Details |
| COX | Carbon Dioxide Recompletion | | | | Details |
| COXSWAIN | Driver of a life boat | | | | Details |
| COXY | Carbon/Oxygen Log | | | | Details |
| CP | Cathodic Protection | | | | Details |
| CP | Cloud Point | | | | Details |
| CP | Casing Pressure | | | | Details |
| cp | Centipoise | | | | Details |
| CP | Core Point | | | | Details |
| CP | CLIPPERTON ISLAND | | | | Details |
| CP | casing point | | | | Details |
| cp | centipose(s) | | | | Details |
| cp | chemically pure | | | | Details |
| CP | correlation point | | | | Details |
| Cp | Colo Camp Colorado | | | | Details |
| CP | sonic compaction factor | | | | Details |
| CP | Closing Pressure | | | | Details |
| CP | Choke Pressure | | | | Details |
| CP | Cathodic Protection | | | | Details |
| CP01 | Electrical Standoff Voltage, Azimuth 1, 0 | | | | Details |
| CP02 | Electrical Standoff Voltage, Azimuth 2, 0 | | | | Details |
| CP03 | Electrical Standoff Voltage, Azimuth 3, 0 | | | | Details |
| CP04 | Electrical Standoff Voltage, Azimuth 4, 0 | | | | Details |
| CP05 | Electrical Standoff Voltage, Azimuth 5, 0 | | | | Details |
| CP06 | Electrical Standoff Voltage, Azimuth 6, 0 | | | | Details |
| CP07 | Electrical Standoff Voltage, Azimuth 7, 0 | | | | Details |
| CP08 | Electrical Standoff Voltage, Azimuth 8, 0 | | | | Details |
| CP09 | Electrical Standoff Voltage, Azimuth 9, 0 | | | | Details |
| CP1 | Conductivity of Pad 1 of HDT or SHDT | | | | Details |
| CP10 | Electrical Standoff Voltage, Azimuth 10, 0 Electric_Potential | | | | Details |
| CP11 | Electrical Standoff Voltage, Azimuth 11, 0 Electric_Potential | | | | Details |
| CP12 | Electrical Standoff Voltage, Azimuth 12, 0 Electric_Potential | | | | Details |
| CP2 | Conductivity of Pad 2 of HDT or SHDT | | | | Details |
| CP3 | Conductivity of Pad 3 of HDT or SHDT | | | | Details |
| CP4 | Conductivity of Pad 4 of HDT or SHDT | | | | 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 |
| CPAS | Volume of Carbon Plus Ash | | | | Details |
| CPC | Chinese Petroleum Corporation | | | | Details |
| CPC | casing pressure closed | | | | Details |
| CPC | Chinese Petroleum Corporation, Taiwan Republic of China | | | | Details |
| CPC | Caspian Pipeline Consortium Kazakhstan | | | | Details |
| CPC | Ceylon Petroleum Corporation Sri Lanka | | | | Details |
| CPC | Cost Per Click | | | | Details |
| CPC | Condensate Production Cumulative | | | | Details |
| CPCL | Chennai Petroleum Corp. Ltd. India | | | | Details |
| CPD | Charterers Pay Dues | | | | Details |
| CPD | Completion Production Days | | | | Details |
| CPDO | Corrected Phase Shift DOWN | | | | Details |
| CPDP | Comite Professionel du Petrole France | | | | Details |
| CPDS | Choke Pressure DownStream | | | | Details |
| CPDT | Corrected depth | | | | Details |
| CPEC | China-Pakistan Economic Corridor | | | | Details |
| CPECC | China Petroleum Engineering Construction Corporation | | | | Details |
| CPEL | Corrosion And Protection Evaluation Log | | | | Details |
| CPEMA | Concurrent Production Eng Maintenance Activities | | | | Details |
| CPERM | Core Permeability | | | | Details |
| CPET | Corrosion And Protection Evaluation Log | | | | Details |
| CPF | Central Processing Facility | | | | Details |
| CPF | casing pressure flowing | | | | Details |
| CPG | Corner Point Geometry | | | | Details |
| CPG | cost per gallon | | | | Details |
| CPHU | Pressure 100s digit (calibrated) | | | | Details |
| CPI | Computed Petrophysical Interpretation | | | | Details |
| CPI | Carbon Preference Index | | | | Details |
| CPI | CPI Log | | | | Details |
| CPI | CPI log (computer-processed interpretation) | | | | Details |
| CPI | corrugated plate interceptor | | | | Details |
| CPI | PT Caltex Pacific Indonesia Indonesia | | | | Details |
| CPI | Consumer Price Index | | | | Details |
| CPI | Consumer Price Index | | | | Details |
| CPI | Cumulative Polymer Injection | | | | Details |
| CPI | Capital Project Index | | | | Details |
| CPIA | Cathodic Protection Industry Association | | | | Details |
| CPICB | CPI Coriband Log | | | | Details |
| CPIRE | CPI Report | | | | Details |
| CPL | Computed Porosity | | | | Details |
| CPLB | Constant Pressure Lower Boundary | | | | Details |
| cplg | coupling | | | | Details |
| CPLT | CTS Production Logging Tool | | | | Details |
| CPM | Capital Project Management | | | | Details |
| CPM | cycles per minute | | | | Details |
| CPM | Critical Path Methodology | | | | Details |
| CPND | Correction to Dolomite Neutron Porosity | | | | Details |
| CPNL | Correction to Limestone Neutron Porosity | | | | Details |
| CPNS | Correction to Sandstone Neutron Porosity | | | | Details |
| CPO | confirming telephone order | | | | Details |
| CPO | Chief Procurement Officer | | | | Details |
| CPOHP | Cumulative production of hindcast period | | | | Details |
| CPON | Pressure 1s digit (calibrated) | | | | Details |
| CPOR | Core porosity | | | | Details |
| CPOR | Core Porosity | | | | Details |
| CPOR | Core Porosity | | | | Details |
| CPOR | Porosity from Core | | | | Details |
| CPOT | Computed Potassium | | | | Details |
| CPP | Central Processing Plant | | | | Details |
| CPP | Casing Potential Profile | | | | Details |
| CPP | Casing Potential Profile | | | | Details |
| CPP | China Petroleum Pipeline | | | | Details |
| CPP | Cumulative Polymer Production | | | | Details |
| CPPC | CPP | | | | Details |
| CPQ | CLIPPERTON ISLAND | | | | Details |
| CPR | Cardio Pulmonary Resuscitation | | | | Details |
| CPR | Choke Performance Relationship | | | | Details |
| CPR | Cooper River Meridian(Alaska) | | | | Details |
| CPR | Caliper Plus Reference | | | | Details |
| CPRA | Concurrent Production & Rig Activities (SIMOPS) | | | | Details |
| CPRD | Z-System Casing Properties Ratio - 375 Hz | | | | Details |
| CPRE | Compressor Pressure | | | | Details |
| CPRI | Current Proppant Index | | | | Details |
| CPRM | Z-System Casing Properties Ratio - 1.5 KHz None | | | | Details |
| CPRO | MPT Conductivity | | | | Details |
| CPRS | Z-System Casing Properties Ratio - 6 KHz | | | | Details |
| CPS | central power station | | | | Details |
| CPS | cycles per second | | | | Details |
| CPS | Contour Plotting System | | | | Details |
| CPS | cement-pumping skid | | | | Details |
| cps | count per second | | | | Details |
| CPS | count per second | | | | Details |
| CPS | Construction Paint System | | | | Details |
| CPSC | Consumer Product Safety Commission | | | | Details |
| CPSD | Pumper Group Slurry Density | | | | Details |
| CPSI | casing pressure shut in | | | | Details |
| CPSR | Current Pumper Slurry Flowrate | | | | Details |
| CPST | Caliper Processing Status - Tool | | | | Details |
| CPSV | Current Pumper Slurry Volume | | | | Details |
| CPT | Compliant Piled Tower (Deepwater) | | | | Details |
| CPT | Carriage Paid To | | | | Details |
| CPT | CLIPPERTON ISLAND | | | | Details |
| cpt | cone penetration test | | | | Details |
| CPT | Component | | | | Details |
| CPTE | Pressure 10s digit (calibrated) | | | | Details |
| CPTH | Computed Potassium and Thorium | | | | Details |
| CPTs | Components | | | | Details |
| CPTU | Computed Potassium and Thorium and Uranium None | | | | Details |
| CPU | central processing unit | | | | Details |
| CPU | Cost per Unit | | | | Details |
| CPUB | Constant Pressure Upper Boundary | | | | Details |
| CPUC | California Public Utilities Commission | | | | Details |
| CPUP | Corrected Phase Shift UP | | | | Details |
| CPUS | Choke Pressure UpStream | | | | Details |
| CPUT | count total over a specified time window | | | | Details |
| CPV | Center Pocket Valve | | | | Details |
| CPV | CAPE VERDE | | | | Details |
| CPVO | Caliper Plus(12) Volts Output | | | | Details |
| CPX | Complex Litho Model | | | | Details |
| CPY | Computed Precession on Y Axis | | | | Details |
| CPZ | Computed Precession on Z Axis | | | | Details |
| CP_CP | Confining Pressure vs. Confining Pressure | | | | Details |
| cp’d | cemented through perforations | | | | Details |
| CQ | NORTHERN MARIANA ISLANDS | | | | Details |
| CQ | CORAL SEA ISLANDS | | | | Details |
| CQ | Combined Quality | | | | Details |
| CQ01 | Electrical Standoff Voltage, Azimuth 1, 90 Electric_Potential | | | | Details |
| CQ02 | Electrical Standoff Voltage, Azimuth 2, 90 Electric_Potential | | | | Details |
| CQ03 | Electrical Standoff Voltage, Azimuth 3, 90 Electric_Potential | | | | Details |
| CQ04 | Electrical Standoff Voltage, Azimuth 4, 90 Electric_Potential | | | | Details |
| CQ05 | Electrical Standoff Voltage, Azimuth 5, 90 Electric_Potential | | | | Details |
| CQ06 | Electrical Standoff Voltage, Azimuth 6, 90 Electric_Potential | | | | Details |
| CQ07 | Electrical Standoff Voltage, Azimuth 7, 90 Electric_Potential | | | | Details |
| CQ08 | Electrical Standoff Voltage, Azimuth 8, 90 Electric_Potential | | | | Details |
| CQ09 | Electrical Standoff Voltage, Azimuth 9, 90 Electric_Potential | | | | Details |
| CQ10 | Electrical Standoff Voltage, Azimuth 10, | | | | Details |
| CQ11 | Electrical Standoff Voltage, Azimuth 11, | | | | Details |
| CQ12 | Electrical Standoff Voltage, Azimuth 12, | | | | Details |
| CQD | Customary Quick Despatch | | | | Details |
| CQG | Crystal Quartz Gauge | | | | Details |
| CQG | Combinable Quartz Gauge | | | | Details |
| CQI | Continuous Quality Improvement | | | | Details |
| CQP | Cement Quality Parameters | | | | Details |
| Cr | Chrome | | | | Details |
| CR | Casing Run | | | | Details |
| CR | Current Rate | | | | Details |
| Cr | Crane | | | | Details |
| CR | Cored | | | | Details |
| CR | COMOROS | | | | Details |
| CR | CORAL SEA ISLANDS | | | | Details |
| CR | COMOROS | | | | Details |
| CR | COSTA RICA | | | | Details |
| Cr | chrome 13Cr is 13% chrome | | | | Details |
| Cr | chromium | | | | Details |
| CR | cold rolled | | | | Details |
| CR | compression ratio | | | | Details |
| CR | Cow Run | | | | Details |
| CR | Con carbon residue(Conradson) | | | | Details |
| cr | moly chrome molybdenum | | | | Details |
| CR | Contingent Resources | | | | Details |
| CR | Contingent Resources | | | | Details |
| CR | Crystal Reports | | | | Details |
| CR | Change Request | | | | Details |
| CR | Contingent Resources | | | | Details |
| CR | SAP Crystal Reports | | | | Details |
| CR | Corrosion Rate | | | | Details |
| CR | Contingent Resource | | | | Details |
| CR | Change Request | | | | Details |
| Cr+6 | hexavalent chromium | | | | Details |
| CR-MSN | Gamma Ray – Multi-Spaced Neutron Log | | | |
