Oil FVF -- Vasquez & Beggs

In this spreadsheet, just type in the required information and press the compute button. Scroll down for more info.

Rs
scf/STB
Gamma_gc
air=1
Tr
deg F
Gamma_API
API
Bo
bbl/STB
V&B's correlation.
Bo = 1 + C1*Rs + C2*(T-60)*(Gamma_API/Gamma_gc) + C3*Rs*(T-60) *(Gamma_API/Gamma_gc)
Where
Bo = oil FVF at p and T, bbl/STB,
Rs = solution GOR, scf/STB, [20,2070]. For more info, refer to Vasquez & Beggs(Best), Lasater(Better), or Standing(Good).
Gamma_gc = Corrected gas gravity (air=1.0). For more info, refer to Corrected Gas Gravity.
Tr = temperature of interest, F, [70,295] and
Gamma_API = stock-tank oil gravity, API [16,58].
C1, C2 and C3 are constants, depending on API.

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