Oil recovery as a function of the fraction of oil displaced from heated zone

Input(s)

F: Air Injected per Unit Oil Produced (Mscf/bbl)

$\varnothing$: Porosity (fraction)

$a_{r}$: Air Required to Burn a Unit Volume of Reservoir $\left(\mathrm{Mscf} / \mathrm{ft}^{3}\right)$

$S_{o i}$: Initial Water Saturation (fraction)

$S_{o f}$: Oil Saturation Burned (fraction)

$E_{O 2}$: Oxygen Consumption Efficiency (fraction)

Output(s)

$E_{c b}$: Oil Recovery (fraction)

Formula(s)

$$ \mathrm{E}_{\mathrm{cb}}=5.615 \frac{\mathrm{a}_{\mathrm{r}}}{\mathrm{F} * \emptyset * \mathrm{E}_{\mathrm{O} 2} *\left(\mathrm{~S}_{\mathrm{oi}}-\mathrm{S}_{\mathrm{of}}\right)} $$

Reference(s)

Prats, M. 1986. Thermal Recovery. Society of Petroleum Engineers, New York, Chapter: 8, Page: 104.