Oil lost in migration
Input(s)
h: Average Change in Depth of the Gas-Oil Contact (ft)
\(\emptyset\): Porosity (fraction)
A: Average Cross-Sectional Area of the Gas-Oil Contact (acres)
\(\mathrm{S}_{\text {org }}\): Residual Oil Saturation in The Gas Cap Shrinking Zone (fraction)
\(\mathrm{B}_{\mathrm{oa}}\): Oil Formation Volume Factor at Abandonment (bbl/STB)
Output(s)
O: Volume of Oil Lost (bbl)
Formula(s)
\[
\mathrm{O}=7758 * \mathrm{~A} * \mathrm{~h} * \emptyset *\left(\frac{\mathrm{S}_{\text {org }}}{\mathrm{B}_{\text {oa }}}\right)
\]
Reference(s)
Ahmed, T., McKinney, P.D. 2005. Advanced Reservoir Engineering, Gulf Publishing of Elsevier, Chapter: 5, Page: 333.