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 .