Wells – Processes – In situ combustion
Patent
1983-03-24
1985-01-15
Suchfield, George A.
Wells
Processes
In situ combustion
166269, E21B 43243
Patent
active
044933690
ABSTRACT:
A method of recovering heavy oil from a subterranean, permeable, heavy oil-bearing reservoir in which an oxygen-containing gas is injected into the lower portion of the reservoir to establish an in-situ combustion reaction therein and to form a combustion front near the injection well. Injection of the oxygen-containing gas is continued to advance the combustion front that heats the oil and generates gas to displace the oil through the reservoir toward a producing well. Water is injected into the upper portion of the reservoir during combustion to prevent gases from migrating into the upper portion of the reservoir, scavenge heat from the burned out portion of the reservoir, and displace oil from the reservoir, particularly the lower region, toward a production well. The areal sweep efficiency of the injected water may be improved by the addition of thickening agents and water-soluble polymers.
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Dotson Billy J.
Odeh Aziz S.
Gilman Michael G.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Suchfield George A.
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