Ignition delay time in in-situ combustion

Input(s)

$M_{r}$: Volumetric Heat Capacity of Reservoir $\left(\mathrm{BTU} / \mathrm{ft}^{3} \mathrm{~K}\right)$

$T_{a}$: Initial Absolute Temperature (K)

$\mathrm{n}$: exponent

$\mathrm{R}$: Gas Constant (BTU/mol K psi)

E: Activation Energy (BTU/K mol)

$(d h)_{a}$: Heat Generated by Oxygen (BTU)

$\varnothing$: Porosity (fraction)

$S_{o}$: Saturation of Oil (fraction)

$\rho_{o}$: Density $(\mathrm{g} / \mathrm{cc})$

$A_{c}$: Pre Exponential Constant (1/psi K)

$P_{o 2}$: Partial Pressure of Oxygen (psi)

Output(s)

$t_{i g}$: Ignition Delay (s)

Formula(s)

Reference(s)

Prats, M. 1986. Thermal Recovery. Society of Petroleum Engineers, New York, Chapter: 8, Page: 95.