Compressibility drive in gas reservoirs
Input(s)
G: Gas in place (MSCF)
\(G_{P}\): Gas Produced (MSCF)
\(B_{g}\): Gas Formation Volume Factor \(\left(\mathrm{MSCF} / \mathrm{ft}^{3}\right)\)
\(E_{f}\): Gas Compressibility Drive \(\left(\mathrm{ft}^{3} / \mathrm{MSCF}\right)\)
Output(s)
CI: Compressibility Index (dimensionless)
Formula(s)
\[
C I=\frac{G * E_{f}}{B_{g} * G_{P}}
\]
Reference(s)
Ahmed, T., McKinney, P.D. Advanced Reservoir Engineering, Gulf Publishing House, Burlington, MA, 2015.