PO.IPR.VW.TF.PI Function
Description:
Calculates transient state productivity index for vertical well, [bbl/(D.psi)].
Excel Function Syntax:
=PO.IPR.VW.TF.PI(time, K, h, Bl, Ul, porosity, Ct, Rw, S)
Parameters:
| Parameter | Description |
|---|---|
| time | Time, [h]. |
| K | Permeability, [mD]. |
| h | Reservoir thickness, [ft]. |
| Bl | Liquid formation volume factor, [bbl/STB]. |
| Ul | Liquid viscosity, [cP]. |
| porosity | Porosity, [fraction]. |
| Ct | Total compressibility, [1/psi]. |
| Rw | Wellbore radius, [ft]. |
| S | Skin factor, [dimensionless]. |
Used in Blueprints
Flow Regime Comparison
Compare well productivity under different flow regimes: pseudosteady state (bounded reservoir), steady state (constant pressure boundary), and transient (infinite-acting). Understanding flow regime impacts is essential for accurate production forecasting.