7.6.4. Formation Volume Factor
Gas-volume factor, Bg, is defined as the ratio of gas volume at reservoir conditions (Preservoir and Treservoir) to the ideal-gas volume at standard conditions,
Substituting values of standard pressure and temperature (Psc = 14.7 psia and Tsc = 520°R) results:
in which T stands for the reservoir temperature (°R) and P denotes the reservoir pressure (psi). This definition of Bg presumes that the gas volume at P and T remains as a gas in standard circumstances. For gas condensates ...