PO.FRAC.Well.SkinEq
Description
Equivalent skin factor for vertical well with hydraulic fracture, [dimensionless].
Syntax
=PO.FRAC.Well.SkinEq(Xf, W, Kf, K, Rw)Parameters
| Parameter | Description |
|---|---|
| Xf | Fracture half-length, [ft]. |
| W | Fracture width, [ft]. |
| Kf | Fracture permeability, [mD]. |
| K | Reservoir permeability, [mD]. |
| Rw | Wellbore radius, [ft]. |
SI Unit Version
Lambda Name
PO.FRAC.Well.SkinEq.SIFormula
=LAMBDA(Xf, W, Kf, K, Rw, LET(
Xf_ft, PO.UnitConverter(Xf, "m", "ft"),
W_ft, PO.UnitConverter(W, "m", "ft"),
Rw_ft, PO.UnitConverter(Rw, "m", "ft"),
PO.FRAC.Well.SkinEq(Xf_ft, W_ft, Kf, K, Rw_ft)))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
Xf |
m | Fracture half-length, [m] |
W |
m | Fracture width, [m] |
Kf |
- | Fracture permeability, [mD] |
K |
- | Reservoir permeability, [mD] |
Rw |
m | Wellbore radius, [m] |
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.FRAC.Well.SkinEq.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.FRAC.Well.SkinEq.SI(...) anywhere in your workbook.