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 .