PO.IPR.GW.PSS.Time.SI
Description
Calculates time to reach pseudosteady state (stabilized flow boundary) in gas well, [h] (SI units).
Formula
=LAMBDA(Re, Rw, K, porosity, Ct, Ug, LET(
Re_ft, PO.UnitConverter(Re, "m", "ft"),
Rw_ft, PO.UnitConverter(Rw, "m", "ft"),
Ct_1psi, PO.UnitConverter(Ct, "1/kPa", "1/psi"),
PO.IPR.GW.PSS.Time(Re_ft, Rw_ft, K, porosity, Ct_1psi, Ug)))Parameters
| Parameter | Unit | Description |
|---|---|---|
Re |
m | Drainage radius, [m] |
Rw |
m | Wellbore radius, [m] |
K |
- | Permeability, [mD] |
porosity |
- | Porosity, [fraction] |
Ct |
1/kPa | Total compressibility, [1/kPa] |
Ug |
- | Gas viscosity, [cP] |
Examples
| Invocation | Expected |
|---|---|
=PO.IPR.GW.PSS.Time.SI(304.8, 0.0762, 50, 0.2, 0.0000145, 0.015) |
2.249758 |