Reservoir flow for gas flow in a formation

Input(s)

$n$: The Performance Exponent (dimensionless)

$\bar{p}$: The Mean Formation Pressure in the Drainage System of Well (psi)

$P_{w f}$: Bottomhole Flowing Pressure (psi)

C: Performance Coefficient, a Function of Mean Pressure Level (bbl/d psi)

Output(s)

$W$: Flow Rate $(\mathrm{bbl} / \mathrm{d})$

Formula(s)

$$ \mathrm{W}=\mathrm{C}\left(\overline{\mathrm{p}}^{2}-\mathrm{p}_{\mathrm{wf}}^{2}\right)^{\mathrm{n}} $$

Reference(s)

Ramey Jr, H. J. (1981). Reservoir Engineering Assessment of Geothermal Systems. Department of Petroleum Engineering, Stanford University. Page: 8.8.