Method and apparatus for recovering heavy oil

E - Fixed Constructions – 21 – B

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166/35

E21B 43/24 (2006.01)

Patent

CA 1192486

ABSTRACT OF THE DISCLOSURE A method and apparatus for recovering heavy oil from an underground oil reservoir, characterized by feeding a mixture gas from a reactant gas circulating system on the ground into an underground steam generator located in the vicinity of the oil reservoir to undergo methanation reaction through a fixed catalyst bed provided in the steam generator, and returning the product gas of the methanation reaction to the overground circulating system through the top of the steam generator for heat exchange with the incoming mixture gas, while feeding water to the steam generator from a water source on the ground, converting the water into steam by the heat of the methanation reaction, and injecting the steam into the oil reservoir.

422201

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