Inflow performance relationship (IPR) for horizontal wells in solution gas-drive reservoirs (Fetkovich)

Input(s)

$q_{\text {omax }}$: Maximum Flow Rate for Maximum Drawdown (STB/day)

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

P: Shut in Pressure or Average Reservoir Pressure (psi)

$\mathrm{n}$: Exponent (dimensionless)

Output(s)

$q_{o}$: Oil Flow Rate $(\mathrm{STB} /$ day $)$

Formula(s)

$$ q_{o}=q_{\text {omax }} *\left(1-\left(\frac{P_{w f}}{P}\right)^{2}\right)^{n} $$

Reference(s)

Joshi, S. D. 1991, Horizontal Well Technology. Tulsa, Oklahoma: PennWell Publishing Company. Chapter: 7, Page: 240.