PO.PVT.Bo.UnSat.ByDefinition
Description
Calculates oil formation volume factor for undersaturated oil, P > Pb, [bbl/STB].
Syntax
=PO.PVT.Bo.UnSat.ByDefinition(Bob, Co, Pb, P)Parameters
| Parameter | Description |
|---|---|
| Bob | Oil formation volume factor at the bubble point pressure, [bbl/STB]. |
| Co | Oil compressibility, [1/psi]. |
| Pb | Bubble point pressure, [psi]. |
| P | Pressure, [psi]. |
SI Unit Version
Lambda Name
PO.PVT.Bo.UnSat.ByDefinition.SIFormula
=LAMBDA(Bob, Co, Pb, P, LET(
Co_1psi, PO.UnitConverter(Co, "1/kPa", "1/psi"),
Pb_psi, PO.UnitConverter(Pb, "kPa", "psi"),
P_psi, PO.UnitConverter(P, "kPa", "psi"),
PO.PVT.Bo.UnSat.ByDefinition(Bob, Co_1psi, Pb_psi, P_psi)))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
Bob |
- | Oil FVF at bubble point |
Co |
1/kPa | Oil compressibility |
Pb |
kPa | Bubble point pressure |
P |
kPa | Pressure |
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.Bo.UnSat.ByDefinition.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.PVT.Bo.UnSat.ByDefinition.SI(...) anywhere in your workbook.