**Description**

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

**Excel Function Syntax**

NonDarcyCoefficient(Rw, h, h_perf, SGgas, Ug, K)

**Online Calculator**

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Home » Functions » Well Flow Performance » Gas Well Production » Gas Pseudosteady State Flow » NonDarcyCoefficient

**Description**

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

**Excel Function Syntax**

NonDarcyCoefficient(Rw, h, h_perf, SGgas, Ug, K)

**Online Calculator**

- NonDarcyCoefficient

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]

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)]

ProdIndexHorWellJoshi

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

ProdIndexHorWellRD

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

ProdIndexHorWellBO

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

ProdIndexHorWellBO2

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

DrainageRadius

Effective drainage radius, [ft]

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