PO.VFP.Aziz.dPdL Function
Description:
Calculates pressure gradient using Aziz et al. (1972) drift-flux model, [psi/ft]. Vertical wells, basis for mechanistic models.
Excel Function Syntax:
=PO.VFP.Aziz.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]. |
Used in Blueprints
Multiphase Correlation Comparison
Compare pressure drop predictions from all ten industry-standard multiphase flow correlations. Understanding correlation differences helps engineers select the most appropriate method for specific well conditions.