| (1) | J = \frac{q}{|p_e - p_{wf}|} |
where
q | flowrate (the specification of which may differ, see below) |
p_e | formation pressure |
p_{wf} | bottom hole pressure at sandface |
The definition of flowrate q and formation pressure p_e may vary depending on application of productivity index.
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management
Subsurface E&P Disciplines / Production Technology
[ Definition specifics on formation pressure and productivity index ]