PO.IPR.VW.TF.Rate
Description
Calculates transient-state production flow rate, [bbl/D].
Syntax
=PO.IPR.VW.TF.Rate(J, Pi, Pwf)Parameters
| Parameter | Description |
|---|---|
| J | Productivity index for transient-state flow. It's time-dependant, [bbl/(D.psi)]. |
| Pi | Initial reservoir pressure, [psi]. |
| Pwf | Bottom-hole flowing pressure, [psi]. |
SI Unit Version
Lambda Name
PO.IPR.VW.TF.Rate.SIFormula
=LAMBDA(J, Pi, Pwf, LET(
J_field, J * PO.UnitConverter(1, "psi", "kPa") / PO.UnitConverter(1, "bbl/d", "m3/d"),
Pi_psi, PO.UnitConverter(Pi, "kPa", "psi"),
Pwf_psi, PO.UnitConverter(Pwf, "kPa", "psi"),
result_bbld, PO.IPR.VW.TF.Rate(J_field, Pi_psi, Pwf_psi),
PO.UnitConverter(result_bbld, "bbl/d", "m3/d")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
J |
m3/d/kPa | Productivity index for transient-state flow. It's time-dependant, [m3/d/kPa] |
Pi |
kPa | Initial reservoir pressure, [kPa] |
Pwf |
kPa | Bottom-hole flowing pressure, [kPa] |
How to save as a reusable Excel function
LAMBDA is a built-in Excel feature (Microsoft 365) that lets you create custom functions without VBA. The formula above works as-is when pasted into a cell.
To save a LAMBDA as a reusable named function:
- Go to Formulas → Name Manager → New
- Enter a name, e.g.
PO.IPR.VW.TF.Rate.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.IPR.VW.TF.Rate.SI(...) anywhere in your workbook.