Thermal injection and in situ combustion process for heavy oils

Details Thermal injection and in situ combustion process for heavy oils Thermal injection and in situ combustion process for heavy oils

E - Fixed Constructions

21

B

166/36, 166/39

E21B 43/24 (2006.01)

Patent

CA 1214722

ABSTRACT A method is disclosed for recovering hydrocarbons from heavy oil and tar sand formations by a series of sequenced steps, wherein the production wells are initially steam stimulated. Thereafter, about 0.6 to about 1.2 pore volumes of steam of a relatively high steam quality are injected into the formation through the injection wells. An additional quantity of steam is then injected wherein the steam quality is decreased to a relatively low quality. Water injection and wet in situ combustion conclude the method.

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