PO.FRAC.PKN.Length.Leakoff
Description
Perkins-Kern-Nordgren (PKN) fracture half-length with Carter leakoff, [ft].
Syntax
=PO.FRAC.PKN.Length.Leakoff(Q, h, C, t)Parameters
| Parameter | Description |
|---|---|
| Q | Injection rate (one wing), [bbl/min]. |
| h | Fracture height, [ft]. |
| C | Carter leakoff coefficient, [ft/sqrt(min)]. |
| t | Pumping time, [min]. |
SI Unit Version
Lambda Name
PO.FRAC.PKN.Length.Leakoff.SIFormula
=LAMBDA(Q, h, C, t, LET(
Q_bblmin, PO.UnitConverter(Q, "m3/min", "bbl/min"),
h_ft, PO.UnitConverter(h, "m", "ft"),
C_ft, PO.UnitConverter(C, "m", "ft"),
result_ft, PO.FRAC.PKN.Length.Leakoff(Q_bblmin, h_ft, C_ft, t),
PO.UnitConverter(result_ft, "ft", "m")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
Q |
m3/min | Injection rate (one wing), [m3/min] |
h |
m | Fracture height, [m] |
C |
m/sqrt(min) | Carter leakoff coefficient, [m/sqrt(min)] |
t |
- | Pumping time, [min] |
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.PKN.Length.Leakoff.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.FRAC.PKN.Length.Leakoff.SI(...) anywhere in your workbook.