Excel Function
PressureGradientGray
Description:
Pressure gradient for multiphase pipe flow by Gray correlation, [psi/ft] It is commonly used for gas wells that are also producing liquid.
Excel Function Syntax:
PressureGradientGray(Ql, Rho_l, Ul, Qg, Ug, SGgas, zFactor, IFTgl, pipeID, pipeRoughness, pipeAngle, P, T)
Online Calculator:
| Parameter | Value | Description |
|---|---|---|
| Ql | Liquid rate, [bbl/d] | |
| Rho_l | Liquid density, [lb/ft3] | |
| Ul | Liquid viscosity, [cP] | |
| Qg | Gas rate, [mmscf/d] | |
| Ug | Gas viscosity, [cP] | |
| SGgas | Gas specific gravity (air=1.0) | |
| zFactor | Gas compressibility factor (Z), [dimensionless] | |
| IFTgl | Liquid-gas interfacial (surface) tension, [dynes/cm] | |
| pipeID | Pipe inner diameter, [in] | |
| pipeRoughness | Pipe relative roughness, [dimensionless] | |
| pipeAngle | Pipe angle from horizontal, [degrees] Horizontal flow: angle = 0; Vertical well producer: angle = 90; Vertical well injector: angle = -90; | |
| P | Pressure, [psia] | |
| T | Temperature, [degF] | |
| Result |
Related Functions
2 items
InletPressureGray
Inlet pressure for multiphase pipe flow by Gray correlation, [psia] It is commonly used for gas wells that are also producing liquid.
OutletPressureGray
Outlet pressure for multiphase pipe flow by Gray correlation, [psia] It is commonly used for gas wells that are also producing liquid.