Volume of gas adsorbed in coalbed methane reservoirs

Input(s)

$\mathrm{V}_{\mathrm{m}}$: Langmuir's Isotherm Constant (SCF/ton)

b: Langmuir's Pressure Constant (1/psi)

p: Pressure $(\mathrm{psi})$

Output(s)

V: Volume of Gas Currently Adsorbed (SCF/ton)

Formula(s)

$$ \mathrm{V}=\frac{\mathrm{V}_{\mathrm{m}} * \mathrm{~b} * \mathrm{p}}{1+\mathrm{b} * \mathrm{p}} $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 4, Page: 320 .