Page 64 - Formulas and Calculations for Petroleum Engineering

Reservoir engineering formulas and calculations Chapter 1 57

Formula(s)

1 ð PVÞ PVÞ p
ð
i
c ¼
f
ð PVÞ P P
i i
Reference: Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3,
Page: 213.
1.130 Transmissibility between compartments
Input(s)
2
g a : Transmissibility of Compartment 1 (mD ft /cP)
2
g b : Transmissibility of Compartment 2 (mD ft /cP)
L 1 : Length of Compartment 1 (ft)
L 2 : Length of Compartment 2 (ft)

Output(s)
2
g: Transmissibility Between Compartments (mD ft /cP)

Formula(s)
ð
g g L +L Þ
b
1
a
2
g ¼
1
a
2
g L +L g b
Reference: Ahmed, T., McKinney, P.D. 2015. Advanced Reservoir Engineering, Gulf Publishing Elsevier, Chapter: 3,
Page: 236.
1.131 Transmissibility of a compartment
Input(s)
k: Permeability (mD)
2
A: Cross-sectional Area (ft )
z: Compressibility Factor (dimensionless)
m g : Gas Viscosity (cP)

Output(s)
2
g: Transmissibility (mD ft /cP)

Formula(s)

k A
g ¼
z m g

Reference: Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Advanced Reservoir Engineering, Gulf
Publishing of Elsevier, Chapter: 3, Page: 236.

1.132 Transmissivity
Input(s)

C: Hazen (dimensionless)
D: Diameter of 10 percentile grain size (mm)