PO.PVT.Uo.UnSat.ByVasquezBeggs
Description
Calculates oil viscosity for undersaturated conditions using Vasquez and Beggs (1980) correlation, P > Pb, [cP].
Syntax
=PO.PVT.Uo.UnSat.ByVasquezBeggs(P, Pb, Uob)Parameters
| Parameter | Description |
|---|---|
| P | Pressure, [psi]. |
| Pb | Bubble point pressure, [psi]. |
| Uob | Oil viscosity at the bubble point pressure, [cP]. |
SI Unit Version
Lambda Name
PO.PVT.Uo.UnSat.ByVasquezBeggs.SIFormula
=LAMBDA(P, Pb, Uob, LET(
P_psi, PO.UnitConverter(P, "kPa", "psi"),
Pb_psi, PO.UnitConverter(Pb, "kPa", "psi"),
Uob_cP, PO.UnitConverter(Uob, "mPa*s", "cP"),
result_cP, PO.PVT.Uo.UnSat.ByVasquezBeggs(P_psi, Pb_psi, Uob_cP),
PO.UnitConverter(result_cP, "cP", "mPa*s")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
P |
kPa | Pressure |
Pb |
kPa | Bubble point pressure |
Uob |
mPa*s | Oil viscosity at bubble point |
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.Uo.UnSat.ByVasquezBeggs.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.PVT.Uo.UnSat.ByVasquezBeggs.SI(...) anywhere in your workbook.