Apparent sorption compressibility
Input(s)
\(B_{g}\): Gas Formation Factor (bbl/SCF)
\(V_{m}\): Langmuir's Constant (dimensionless)
\(\rho_{B}\): Bulk Density of the Coal Deposit \(\left(\mathrm{gm} / \mathrm{cm}^{3}\right)\)
b: Langmuir's Constant (dimensionless)
\(\emptyset\): Porosity (fraction)
p: Pressure \((\mathrm{psi})\)
Output(s)
\(c_{s}\): Apparent Sorption Compressibility (1/psi)
Formula(s)
\[
\mathrm{c}_{\mathrm{s}}=\frac{0.17525 * \mathrm{~B}_{\mathrm{g}} * \mathrm{~V}_{\mathrm{m}} * \rho_{\mathrm{B}} * \mathrm{~b}}{\emptyset *(1+\mathrm{b} * \mathrm{p})^{2}}
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 222 .