PO.MBE.Ce.Geopressured
Description
Calculates effective compressibility for geopressured reservoir with gas solubility, [1/psi].
Syntax
=PO.MBE.Ce.Geopressured(cw, cf, Sw, Rsw, Bg)Parameters
| Parameter | Description |
|---|---|
| cw | Base water compressibility, [1/psi]. |
| cf | Formation compressibility, [1/psi]. |
| Sw | Water saturation, [fraction]. |
| Rsw | Solution gas-water ratio, [scf/STB]. |
| Bg | Gas FVF, [RB/scf]. |
SI Unit Version
Lambda Name
PO.MBE.Ce.Geopressured.SIFormula
=LAMBDA(cw, cf, Sw, Rsw, Bg, LET(
cw_1psi, PO.UnitConverter(cw, "1/kPa", "1/psi"),
cf_1psi, PO.UnitConverter(cf, "1/kPa", "1/psi"),
Rsw_scfSTB, PO.UnitConverter(Rsw, "sm3/sm3", "scf/STB"),
Bg_bblft3, PO.UnitConverter(Bg, "m3/m3", "bbl/ft3"),
result_1psi, PO.MBE.Ce.Geopressured(cw_1psi, cf_1psi, Sw, Rsw_scfSTB, Bg_bblft3),
PO.UnitConverter(result_1psi, "1/psi", "1/kPa")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
cw |
1/kPa | Base water compressibility, [1/kPa] |
cf |
1/kPa | Formation compressibility, [1/kPa] |
Sw |
- | Water saturation, [fraction] |
Rsw |
sm3/sm3 | Solution gas-water ratio, [sm3/sm3] |
Bg |
rm3/sm3 | Gas FVF, [rm3/sm3] |
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.MBE.Ce.Geopressured.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.MBE.Ce.Geopressured.SI(...) anywhere in your workbook.