Total Oil Formation Volume Factor (Bo,t)

The total formation volume factor (Bt) is defined as the ratio of the total volume of the hydrocarbon mixture (i.e., oil and gas, if present), at the prevailing pressure and temperature per unit volume of the stock-tank oil.

Bt is used to describe the pressure-volume relationship of hydrocarbon systems below their bubble-point pressure.

Reference: Reservoir Engineering Handbook, Tarek Ahmed

Correlations

  • 1-Standing
  • 2-Glaso
  • 3-Marhoun

Input Parameters

NameInput Value - UnitConverted ValueValidity CheckLink to Calculation Page
Solution Gas/Oil Ratio (Rs) More Details

scf/STB

Oil Gas Solubility (Rs)
Solution Gas Specific Gravity (ɣg) More Details

SG

Solution Gas Specific Gravity (ɣg)
Temperature

°R

Stock Tank Oil Specific Gravity (ɣo) More Details

deg API

Saturated Oil Density (ρo,s)
Pressure Absolute Pressure

psi

CALCULATE

Results

CorrelationCalculated ValueWarningsRemarks
1-Standingbbl/STBCalifornia crude oils and natural gases
2-Glasobbl/STBNorth Sea crude oil
3-Marhounbbl/STBMiddle Eastern crude oil systems