Injected air required to burn through unit bulk of reservoir for in-situ combustion by Nelson and McNiel
Input(s)
\(a_{r}\): Air Required to Burn through Reservoir \(\left(\mathrm{MSCF} / \mathrm{ft}^{3}\right)\)
\(T_{s c, a b}\): Temperature at Standard Condition (K)
\(T_{a b}\): Temperature at Absolute Condition (K)
\(P_{s c, a b}\): Pressure at Standard Condition (psi)
\(P_{i n j, a b}\): Pressure at Absolute Condition (psi)
\(\emptyset\): Porosity (fraction)
\(E_{O 2}\): Utilization Efficiency of Oxygen (fraction)
Output(s)
\(a_{r}\): Injected Air Required to Burn through Unit Reservoir Bulk (MSCF/ \(\mathrm{ft}^{3}\) )
Formula(s)
\[
\mathrm{a}_{\mathrm{r}}=\frac{\mathrm{a}_{\mathrm{r}}+\left(10^{-3}\right) *\left(\frac{\mathrm{T}_{\mathrm{sc}, \mathrm{ab}}}{\mathrm{T}_{\mathrm{ab}}}\right) *\left(\frac{\mathrm{P}_{\mathrm{inj}, \mathrm{ab}}}{\mathrm{P}_{\mathrm{sc}, \mathrm{ab}}}\right) * \emptyset}{\mathrm{E}_{\mathrm{O} 2}}
\]
Reference(s)
Michael Prats. Thermal recovery. Society of Petroleum Engineers. New York.1986, Page: 96.