In situ combustion process for multi-stratum reservoirs

Details In situ combustion process for multi-stratum reservoirs In situ combustion process for multi-stratum reservoirs

1975-10-24

1976-09-07

Novosad, Stephen J.

Wells

Processes

In situ combustion

166261, 166245, E21B 4324

Patent

active

039789209

ABSTRACT:
In a combustion process for recovering hydrocarbons from a subterranean hydrocarbon-bearing formation comprising an upper permeable hydrocarbon-bearing stratum overlying a lower permeable hydrocarbon-bearing stratum and separated therefrom by a semi-permeable stratum which is substantially permeable to oxygen but not substantially permeable to water; the strata are traversed by injection and production wells, the lower hydrocarbon-bearing stratum is ignited near an injection well and oxygen-containing gas is injected into the lower hydrocarbon-bearing stratum to combust hydrocarbons near the injection well and form a combustion front, an oxygen-containing gas is injected into the lower hydrocarbon-bearing stratum and an aqueous fluid is injected into the upper hydrocarbon-bearing stratum to move the combustion front between the injection and the production wells and to prevent or mitigate channeling through the upper hydrocarbon-bearing stratum, and hydrocarbons are recovered from the strata.

REFERENCES:
patent: 3159215 (1964-12-01), Meldau et al.
patent: 3196945 (1965-07-01), Craig, Jr. et al.
patent: 3208519 (1965-09-01), Moore
patent: 3332480 (1967-07-01), Parrish
patent: 3334687 (1967-08-01), Parker
patent: 3361201 (1968-01-01), Howard
patent: 3369601 (1968-02-01), Bond et al.
patent: 3565174 (1971-02-01), Parker et al.
patent: 3872924 (1975-03-01), Clampitt

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