Gas expansion term in gas reservoirs

Input(s)

$\mathrm{B}_{\mathrm{g}}$: 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)

$\mathrm{E}_{\mathrm{g}}$: Gas Expansion Term $\left(\mathrm{ft}^{3} / \mathrm{SCF}\right)$

Formula(s)

$$ \mathrm{E}_{\mathrm{g}}=\mathrm{B}_{\mathrm{g}}-\mathrm{B}_{\mathrm{gi}} $$

Reference(s)

Ahmed, T., McKinney, P.D.2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 3, Page: 209.