Original gas in place
Input(s)
A: Area of Reservoir (acres)
h: Average Reservoir Thickness (ft)
\(\emptyset\): Porosity (fraction)
\(\mathrm{S}_{\mathrm{wi}}\): Initial Water Saturation (fraction)
\(\mathrm{B}_{\mathrm{gi}}\): Gas Formation Volume Factor at Initial Pressure (ft3/SCF)
Output(s)
G: Gas-in-Place (SCF)
Formula(s)
\[
\mathrm{G}=\frac{43560 * \mathrm{~A} * \mathrm{~h} * \emptyset *\left(1-\mathrm{S}_{\mathrm{wi}}\right)}{\mathrm{B}_{\mathrm{gi}}}
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 202 .