Productivity Index based on all fluids across the well-reservoir contact:

J_t = \frac{q_t}{p_e-p_{wf}}

where

total sandface flowrate 

multiphase formation pressure

sandface bottom hole pressure


See Also


Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management / Productivity Index / Sandface Productivity Index

Subsurface E&P Disciplines / Production Technology