The relation between the bottom-hole pressure and surface flow rate during the stabilised reservoir flow:
q = J \, (p_r - p_{wf}) |
corresponding to linear IPR with constant productivity index :
J = \frac{2 \pi \sigma}{ \ln \frac{r_e}{r_w} + \epsilon+ S} |
where
transmissibility above bubble point | |
for Steady State (SS) well flow regime | |
for Pseudo Steady State (PSS) well flow regime |