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.