PO.FRAC.PKN.Width.Leakoff Function

Description:

Perkins-Kern-Nordgren (PKN) fracture width with Carter leakoff (large time), [inches].

Excel Function Syntax:

=PO.FRAC.PKN.Width.Leakoff(Q, Ul, h, G, nu, C, t)

Parameters:

Parameter	Description
Q	Injection rate (one wing), [bbl/min].
Ul	Fluid viscosity, [cp].
h	Fracture height, [ft].
G	Shear modulus, [psi].
nu	Poisson's ratio, [dimensionless].
C	Carter leakoff coefficient, [ft/sqrt(min)].
t	Pumping time, [min].