In this research, in situ combustion performance calculations were performe
d using different algorithms, which were based on oil recovery/volume burne
d correlative methods. The correlations were based on field and laboratory
combustion tube results. A computer method was developed and applied to dif
ferent heavy crude oil fields. The results showed that an in situ combustio
n process is applicable in these fields if the volume burned is 30% for fie
ld 1 and 40% for field 2.