**Description**

Equivalent skin factor for vertical well with hydraulic fracture.

**Excel Function Syntax**

EquivalentSkinFactor(Xf, W, K_fracture, K, Rw)

**Online Calculator**

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Home » Functions » Well Flow Performance » Miscellaneous » Drainage Geometry » EquivalentSkinFactor

**Description**

Equivalent skin factor for vertical well with hydraulic fracture.

**Excel Function Syntax**

EquivalentSkinFactor(Xf, W, K_fracture, K, Rw)

**Online Calculator**

- EquivalentSkinFactor

DrainageRadius

Effective drainage radius, [ft]

DrainageAreaHorWell1

The horizontal well drainage area is represented by two half circles of radius b at each end and a rectangle, of dimensions L(2b), in the center. (Joshi Method 1), [acres]

DrainageAreaHorWell2

The horizontal well drainage area is an ellipse. (Joshi Method 2), [acres]

EffectiveWellboreRadius

Effective wellbore radius, [ft]

GasFlowRatePSS

GasFlowRatePSS – Gas well flow rate for pseudosteady state condition using Darcy flow approximation, [mscf/d]

GasFlowRatePSSNonDarcy

Gas well stabilized flow rate for pseudosteady state condition, with Non-Darcy flow equation, [mscf/d]

TimeToPSSGas

Time to stabilized flow in gas well, [h]

NonDarcyCoefficient

Correlation for estimating non-Darcy coefficient, [d/mscf]

ProdIndexHorWellBorisov

Horizontal well productivity index under steady state flow. Borisov method for well in an isotropic reservoir, [STB/(d.psi)]

ProdIndexHorWellGRJ

Horizontal well productivity index under steady state flow. The Giger-Reiss-Jourdan method for well in an anisotropic reservoir, [STB/(d.psi)]

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