E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/33
E21B 43/24 (2006.01) E21B 43/16 (2006.01) E21B 43/30 (2006.01)
Patent
CA 1102685
HIGH VERTICAL CONFORMANCE STEAM DRIVE OIL RECOVERY METHOD (D#74,837-F) ABSTRACT OF THE DISCLOSURE The vertical or both vertical and horizontal conformance of a steam drive process is improved and steam override reduced by penetrating the zone between one injector and one producer, with one or more infill wells in fluid communication with the bottom half or less of the formation, and producing petroleum from the infill well after steam channeling has occurred at the production well. After the water cut of the fluids being produced from the infill well reaches 95 percent, the infill well is converted from a producer to an injector and steam is injected into the infill well and fluids are recovered from the production well. When one infill well is employed in a more or less aligned arrangement between injection and production wells, the vertical conformance is improved. When one or more infill wells are positioned in an offset or nonaligned arrangement relative to each injector and producer, conformance in both the horizontal and vertical planes is improved. By this multi-step process involving the infill wells, the amount of oil recovered from the portion of the formation in the recovery zone defined by the injection and production well is increased significantly. -I-
333686
Brown Alfred
Hall Wilbur L.
Korstad Ralph J.
Wu Ching H.
Gowling Lafleur Henderson Llp
Texaco Development Corporation
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