PO.VFP.BeggsBrill.dPdL

Description

Calculates pressure gradient for multiphase pipe flow using Beggs and Brill (1973) correlation, [psi/ft]. Can be applied for any wellbore inclination and flow direction.

Syntax

=PO.VFP.BeggsBrill.dPdL(Ql, Qg, P, Rho_l, Ul, Bl, Rho_g, Ug, Bg, IFT_gl, Rs, pipe_ID, pipe_roughness, pipe_angle)

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].
pipe_angle	Pipe angle from horizontal, [degrees]. Horizontal flow: angle = 0; Vertical well producer: angle = 90; Vertical well injector: angle = -90.