Page 49 - Formulas and Calculations for Petroleum Engineering

42 Formulas and calculations for petroleum engineering

Output(s)

F: Dimensionless Factor (fraction)
B o : Oil formation factor (fraction)

Formula(s)

0:5
g g
F ¼ R +1:25 T
s
g o
B ¼ 0:972 + 0:000147 F 1:175
o
Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft & Hawkins, Page: 37.

1.96 Oil formation volume factor—Beggs-standing correlation—P > P b

Input(s)
B b : Oil formation vol factor at bubble pt pressure (fraction)
c o : Oil compressibility (/psi)
p b : Bubble point pressure (psi)
p: Pressure (psi)

Output(s)

B o : Oil formation factor (fraction)

Formula(s)

ð
ð
B ¼ B exp c p pÞÞ
o
b
b
o
Reference: Applied Petroleum Reservoir Engineering, Second Edition, Craft & Hawkins, Page: 37.
1.97 Oil in place for undersaturated oil reservoirs without fluid injection

Input(s)
N p : Produced Oil (STB)
B o : Oil Formation Volume Factor (rb/STB)
B oi : Initial Oil Formation Volume Factor (rb/STB)
S wi : Initial Water Saturation (fraction)
c w : Water Compressibility (1/psi)
c f : Formation Compressibility (1/psi)
DP: Pressure Differential (psi)

Output(s)

N: Oil in Place (STB)