High-pressure region gas flow rate
Input(s)
k: Permeability \((\mathrm{mD})\)
\(\mathrm{h}\): Thickness (ft)
\(P_{r}\): Average Reservoir Pressure (psi)
\(P_{w f}\): Bottom-hole Flowing Pressure (psi)
\(\mu_{\text {gavg }}\): Average Gas Viscosity \((\mathrm{cP})\)
\(B_{\text {gavg }}\): Average Gas Formation Volume Factor (bbl/SCF)
\(r_{e}\): Drainage Radius ( \(\mathrm{ft}\) )
\(r_{w}\): Wellbore Radius \((\mathrm{ft})\)
\(S\): Skin (dimensionless)
Output(s)
\(Q_{g}\): Gas Flow Rate \((\mathrm{MSCF} / \mathrm{d})\)
Formula(s)
\[
Q_{g}=\frac{7.08 *\left(10^{-6}\right) * k * h *\left(P_{r}-P_{w f}\right)}{\mu_{\text {gavg }} * B_{\text {gavg }} *\left(\ln \left(\frac{r_{e}}{r_{w}}\right)-0.75+S\right)}
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 189 .