Gas produced by gas expansion

Input(s)

A: Drainage Area (acres)

$\mathrm{h}$: Thickness (ft)

$\emptyset$: Porosity (fraction)

$\mathrm{S}_{\mathrm{wi}}$: Initial Water Saturation (fraction)

$\mathrm{B}_{\mathrm{g}}$: Gas Formation Volume Factor $\left(\mathrm{ft}^{3} / \mathrm{SCF}\right)$

$\mathrm{B}_{\mathrm{gi}}$: Initial Gas Formation Volume Factor $\left(\mathrm{ft}^{3} / \mathrm{SCF}\right)$

Output(s)

$\mathrm{G}_{\mathrm{p}}$: Gas Produced (SCF)

Formula(s)

$$ \mathrm{G}_{\mathrm{p}}=43560 * \mathrm{~A} * \mathrm{~h} * \emptyset *\left(1-\mathrm{S}_{\mathrm{wi}}\right) *\left(\frac{1}{\mathrm{~B}_{\mathrm{gi}}}-\frac{1}{\mathrm{~B}_{\mathrm{g}}}\right) $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 202.