Hydrocarbon pore volume occupied by gas cap

Input(s)

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

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

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

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

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

Output(s)

V: Volume of the Gas Cap at Current Pressure (bbl)

Formula(s)

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

Reference(s)

Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 4, Page: 301 .