Initial gas cap

Input(s)

m: Ratio of Initial Gas Cap Gas Reservoir Volume to Initial Reservoir Oil Volume (bbl/bbl)

$\mathrm{N}$: Original Oil in Place (STB)

$\mathrm{B}_{\mathrm{oi}}$: Oil Formation Volume Factor (bbl/STB)

$\mathrm{B}_{\mathrm{gi}}$: Initial Gas Formation Volume Factor (bbl/SCF)

Output(s)

G: Initial Gas Cap Gas (SCF)

Formula(s)

$$ \mathrm{G}=\frac{\mathrm{m} * \mathrm{~N} * \mathrm{~B}_{\mathrm{oi}}}{\mathrm{B}_{\mathrm{gi}}} $$

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 4, Page: 300 .