Page 52 - Formulas and Calculations for Petroleum Engineering

Reservoir engineering formulas and calculations Chapter 1 45

Output(s)

Q 12 : Flow Rate between the Two Compartments (SCF/day)

Formula(s)

0:111924 k A
Q ¼ mP ðÞ mPðÞð 1 2 Þ
12
T L
Reference: Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3,
Page: 234, 235.

1.103 Performance coefficient for shallow gas reservoirs
Input(s)

k: Permeability (mD)
h: Thickness (ft)
T: Temperature (°R)
m: Viscosity (cP)
z: Compressibility Factor (dimensionless)
r e : Radius of Drainage Area (ft)
r w : Wellbore Radius (ft)

Output(s)

C: Performance Coefficient (dimensionless)

Formula(s)

k h
C ¼
r
1422 T m Z ln e 0:5
g
r
w
Reference: Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3,
Page: 287.

1.104 Poisson’s ratio

Input(s)
x t : Transverse Strain (dimensionless)
x l : Longitudinal Strain (dimensionless)

Output(s)

m: Poisson (dimensionless)

Formula(s)

x t
m ¼
l
x
Reference: Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4.
Chapter 3, Page: 55.