The most accurate estimation of Productivity Index is based on 3D numerical computation but there are numerous proxy models covering popular categories of reservoir properties and well-reservoir contacts.
| (1) | J = \frac{2 \pi \sigma}{ \ln \frac{r_e}{r_w} + \epsilon+ S} |
where
\sigma | |
\epsilon = 0.5 | for Steady State (SS) well flow regime |
\epsilon = 0.75 | for Pseudo Steady State (PSS) well flow regime |
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Subsurface E&P Disciplines / Production Technology / Productivity Index
[ Definition specifics on formation pressure and productivity index ]
[ Sandface Productivity Index ] [ Surface Productivity Index ] [ Specific Productivity Index ] [ Injectivity Index ] [ Drainarea Productivity Index (Jr) ]