PO.VFP.PoettmannCarpenter.dPdL
Description
Calculates pressure gradient using Poettmann-Carpenter (1952), [psi/ft]. Historical no-slip method for high-rate dispersed bubble flow.
Syntax
=PO.VFP.PoettmannCarpenter.dPdL(Ql, Qg, P, Rho_l, Ul, Bl, Rho_g, Ug, Bg, IFT_gl, Rs, pipe_ID, pipe_roughness)Parameters
| Parameter | Description |
|---|---|
| Ql | Liquid rate, [bbl/D]. |
| Qg | Gas rate, [mmscf/D]. |
| P | Pressure, [psi]. |
| Rho_l | Liquid density at in-situ conditions, [lb/ft3]. |
| Ul | Liquid viscosity at in-situ conditions, [cP]. |
| Bl | Liquid formation volume factor, [bbl/STB]. |
| Rho_g | Gas density at in-situ conditions, [lb/ft3]. |
| Ug | Gas viscosity at in-situ conditions, [cP]. |
| Bg | Gas formation volume factor, [rcf/scf]. |
| IFT_gl | Liquid-gas interfacial (surface) tension, [dynes/cm]. |
| Rs | Solution gas-oil ratio, [scf/STB]. |
| pipe_ID | Pipe inner diameter, [in]. |
| pipe_roughness | Pipe relative roughness, [dimensionless]. |