Total Formation Volume Factor

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

Bo
bbl/STB
Rsb
scf/STB
Rs
scf/STB
T
deg F
P
psia
Zg
Bt
bbl/STB
Total Formation Volume Factor
Bt = Bo + Bg*(Rsb - Rs)
Where
Bt = total FVF, bbl/STB,
Rsb = solution GOR at pb, scf/STB. For more info, refer to Vasquez & Beggs, Lasater, or Standing.
Rs = solution GOR at p, scf/STB. For more info, refer to Vasquez & Beggs, Lasater, or Standing.
Bo = oil FVF. For more info, refer to Saturated--Standing, Saturated--Vasquez & Beggs, or Undersaturated.
Bg = gas FVF, = 0.00504*Zg*T/p,
p = pressure of interest, psia
T = temperature of interest, F, and
Zg = gas compressibility at p and T. For more info, refer to Z Factor.

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