Gas solubility in coalbed methane reservoirs

Input(s)

$\rho_{\mathrm{B}}$: Bulk Coal Steam Density $(\mathrm{g} / \mathrm{cc})$

$\varnothing_{\mathrm{m}}$: Actual Coalbed Cleat Porosity (fraction)

$\mathrm{S}_{\mathrm{om}}$: Initial Oil Saturation (fraction)

V: Gas Content (SCF/STB)

Output(s)

$\mathrm{R}_{\mathrm{s}}$: Equivalent Gas Solubility (dimensionless)

Formula(s)

$$ \mathrm{R}_{\mathrm{s}}=\left(\frac{0.17525 * \rho_{\mathrm{B}}}{\emptyset_{\mathrm{m}} * \mathrm{~S}_{\mathrm{om}}}\right) * \mathrm{~V} $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 222 .