Shape factor expressed as skin factor for vertical wells

Input(s)

$C_{A}$: Shape Factor (dimensionless)

Output(s)

$s_{C A}$: Shape Related Skin Factor (dimensionless)

Formula(s)

$$ s_{C A}=\ln \left(\left(\frac{31.62}{C_{A}}\right)^{0.5}\right) $$

Reference(s)

Joshi, S. D. 1991, Horizontal Well Technology. Tulsa, Oklahoma: PennWell Publishing Company. Chapter: 7, Page: 208 .