PO.SF.CH.Ros.Rate
Description
Liquid flow rate using Ros (1960) critical flow correlation, [bbl/d].
Syntax
=PO.SF.CH.Ros.Rate(Pwh, d_choke, GLR)Parameters
| Parameter | Description |
|---|---|
| Pwh | Wellhead pressure, [psia]. |
| d_choke | Choke diameter, [inches]. |
| GLR | Gas-liquid ratio, [scf/bbl]. |
SI Unit Version
Lambda Name
PO.SF.CH.Ros.Rate.SIFormula
=LAMBDA(Pwh, d_choke, GLR, LET(
Pwh_psi, PO.UnitConverter(Pwh, "kPa", "psi"),
d_choke_in, PO.UnitConverter(d_choke, "cm", "in"),
GLR_scfbbl, PO.UnitConverter(GLR, "sm3/m3", "scf/bbl"),
result_bbld, PO.SF.CH.Ros.Rate(Pwh_psi, d_choke_in, GLR_scfbbl),
PO.UnitConverter(result_bbld, "bbl/d", "m3/d")))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
Pwh |
kPa | Wellhead pressure, [kPa] |
d_choke |
cm | Choke diameter, [cm] |
GLR |
sm3/m3 | Gas-liquid ratio, [sm3/m3] |
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.SF.CH.Ros.Rate.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.SF.CH.Ros.Rate.SI(...) anywhere in your workbook.