J^{\downarrow} = \frac{q^{\downarrow}}{p_{wf} - p_e} |
where
| flowrate (the specification of which may differ, see below) | |
| formation pressure | |
| bottom hole pressure at sandface |
The definition of flowrate and formation pressure
may vary depending on application of productivity index.
Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management
Subsurface E&P Disciplines / Production Technology