Page 47 - Formulas and Calculations for Petroleum Engineering

40 Formulas and calculations for petroleum engineering

Output(s)

2
k: Permeability (m )
Formula(s)
3
ð Ø ØcÞ 2
k ¼ B d
2
ð 1+ Øc ØÞ
Reference: Wikipedia.org.

1.91 Normalized saturation

Input(s)
S w : Saturation of Water (fraction)
S or : Residual Water Saturation (fraction)
S wi : Initial Water Saturation (fraction)

Output(s)
Son: Normalized Saturation (fraction)

Formula(s)

1 S S or
w
Son ¼
1 S S or
wi
Reference: Wikipedia.org.

1.92 Oil bubble radius of the drainage area of each well represented by a circle
Input(s)

N p : Well Current Cumulative Oil Production (bbl)
Ø: Porosity (fraction)
h: Thickness (ft)
S wi : Initial Water Saturation at bubble point pressure (fraction)
B o : Oil Formation Volume factor (bbl/STB)
B oi : Initial Oil Formation Volume Factor (bbl/STB)
S o : Current Oil Saturation (fraction)

Output(s)

r ob : Oil Bubble Radius (ft)

Formula(s)

0:5
0 1
5:615 N
B p C
r ¼ B C
ob
@ 1 S wi S o A
p Ø h
B oi B o
Reference: Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 4,
Page: 313.