PO.PVT.Co.Sat.ByVillenaLanzi
Description
Calculates oil compressibility using Villena-Lanzi (1985) correlation, P <= Pb, [1/psi].
Syntax
=PO.PVT.Co.Sat.ByVillenaLanzi(P, Pb, T_degF, Rsb, API)Parameters
| Parameter | Description |
|---|---|
| P | Pressure, [psi]. |
| Pb | Bubble point pressure, [psi]. |
| T_degF | Temperature, [degF]. |
| Rsb | Solution gas-oil ratio at the bubble point pressure, [scf/STB]. |
| API | Oil gravity, [API]. |
SI Unit Version
Lambda Name
PO.PVT.Co.Sat.ByVillenaLanzi.SIFormula
=LAMBDA(P, Pb, T_degC, Rsb, API, LET(
P_psi, PO.UnitConverter(P, "kPa", "psi"),
Pb_psi, PO.UnitConverter(Pb, "kPa", "psi"),
T_degF, PO.UnitConverter(T_degC, "degC", "degF"),
Rsb_scfSTB, PO.UnitConverter(Rsb, "sm3/sm3", "scf/STB"),
result_1psi, PO.PVT.Co.Sat.ByVillenaLanzi(P_psi, Pb_psi, T_degF, Rsb_scfSTB, API),
PO.UnitConverter(result_1psi, "1/psi", "1/kPa")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
P |
kPa | Pressure |
Pb |
kPa | Bubble point pressure |
T_degC |
degC | Temperature |
Rsb |
sm3/sm3 | Solution gas-oil ratio at bubble point |
API |
- | Oil API gravity |
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.PVT.Co.Sat.ByVillenaLanzi.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.PVT.Co.Sat.ByVillenaLanzi.SI(...) anywhere in your workbook.