# 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.

## Related

### Mass of fuel burned per unit bulk reservoir volume combustion - Nelson and McNiel

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