Effective wellbore radius, [ft]
Excel Function Syntax
Effective drainage radius, [ft]
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]
The horizontal well drainage area is an ellipse. (Joshi Method 2), [acres]
Equivalent skin factor for vertical well with hydraulic fracture.
GasFlowRatePSS – Gas well flow rate for pseudosteady state condition using Darcy flow approximation, [mscf/d]
Gas well stabilized flow rate for pseudosteady state condition, with Non-Darcy flow equation, [mscf/d]
Time to stabilized flow in gas well, [h]
Correlation for estimating non-Darcy coefficient, [d/mscf]
Horizontal well productivity index under steady state flow. Borisov method for well in an isotropic reservoir, [STB/(d.psi)]
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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