E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/24 (2006.01) F22B 1/18 (2006.01)
Patent
CA 2706399
A method for thermal recovery of heavy oil, bitumen and natural gas from a formation containing various hydrocarbons and an apparatus for generating a mixture of steam and flue gas, named as steamflue gas. In general, the method incorporates high temperature flue gas into a steam assisted gravity drainage (SAGD) operation to become a steamflue gas injection. A mixture of high temperature flue gas and steam is injected into the SAGD top well within a formation to enhance recovery of heavy oil and bitumen. The high temperature flue gas is produced from the first burner burning inexpensive fuels, such as coal, used oil, scraped tire, petroleum coke and sludge containing high oil content; and the steam is generated by mixing water with the high temperature flue gas or the steam generated using a steam generator conventionally used in a SAGD recovery operation. The returning flue gas with entrained hydrocarbons from the formation is burned in the second burner as an additional fuel to preheat water or generate steam. Then the flue gas produced from the second burner is injected into the formation and acts to re-pressurize the formation which otherwise becomes depressurized when depleted of natural gas. Accordingly, environmental and economic advantages are realized with the methodology.
Gu Guoxing
Gu Guoxing
Little Moon Venture Ltd.
Na
LandOfFree
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