PROCESS FOR SELECTIVE PLACEMENT OF POLYMER GELS FOR PROFILE CONTROL IN THERMAL RECOVERY

摘要

F-4352 PROCESS FOR SELECTIVE PLACEMENT OF POLYMER GELS FOR PROFILE CONTROL IN THERMAL OIL RECOVERY Highly permeable thermally fluid swept zones in an oil containing formation are selectively plugged by a high temperature selective gel-forming solution without plugging the less permeable unswept portion of the formation. Ungelled solution in the less permeable unswept portion of the formation in the vicinity of the injection well is removed and a thermal fluid is injected into the formation that sweeps oil from the less permeable, unswept portion of the formation, thereby resulting in more complete displacement of oil from the formation.