PO.IPR.HW.PSS.PI.ByBabuOdeh Function

Description:

Calculates pseudosteady state productivity index for horizontal well using Babu-Odeh method for a box-shaped, anisotropic reservoir, with a well placed parallel to X(box length)-direction, [STB/(d.psi)].

Excel Function Syntax:

=PO.IPR.HW.PSS.PI.ByBabuOdeh(size_x, size_y, size_z, Kx, Ky, Kz, L, Rw, Bl, Ul, S, x1, y0, z0)

Parameters:

Parameter	Description
size_x	Length size of the reservoir drainage box. X-direction, parallel to the well, [ft].
size_y	Width size of the reservoir drainage box. Y-direction, perpendicular to the well, [ft].
size_z	Reservoir thickness. Z-direction, [ft].
Kx	Horizontal permeability in X-direction, [mD].
Ky	Horizontal permeability in Y-direction, [mD].
Kz	Vertical permeability, [mD].
L	Length of the horizontal part of the well, [ft].
Rw	Wellbore radius, [ft].
Bl	Liquid formation volume factor, [bbl/STB].
Ul	Liquid viscosity, [cP].
S	Skin factor, [dimensionless].
x1	X location of the heel of the well. For the centrally placed well is equal to 0.5*(boxLength-wellLength), [ft].
y0	Y location of the heel of the well. For the centrally placed well is equal to 0.5*boxWidth, [ft].
z0	Z location of the heel of the well. For the centrally placed well is equal to 0.5*reservoirHeight, [ft].