Productivity index (for generating composite IPR curve)

Input(s)

q: Tested Flow Rate $($ STB/D)

$P_{b}$: Bubble Point Pressure $(\mathrm{psi})$

$P_{w}$: Wellbore Pressure (psi)

P: Reservoir Pressure (psi)

Output(s)

$J_{i}$ : Productivity Index $(\mathrm{STB} / \mathrm{D} / \mathrm{psi})$

Formula(s)

$$ J_{i}=\frac{q}{\left(P-P_{b}\right)+\left(\frac{P_{b}}{1.8}\right)\left(1-0.2 *\left(\frac{P_{w}}{P}\right)-0.8 *\left(\frac{P_{w}}{P}\right)^{2}\right)} $$

Reference(s)

Boyun, G., William, C., \& Ali Ghalambor, G. (2007). Petroleum Production Engineering: A Computer-Assisted Approach, Page: $3 / 38$.