Process and device for oil recovery using steam and oxygen-conta

Details Process and device for oil recovery using steam and oxygen-conta Process and device for oil recovery using steam and oxygen-conta

1988-01-11

1989-08-29

Kisliuk, Bruce M.

Wells

Processes

In situ combustion

166 57, 166272, 166902, E21B 43243

Patent

active

048608270

ABSTRACT:
Oil is recovered from an underground formation by the use of steam and a gas rich in oxygen. In a priming stage, high quality saturated steam or superheated steam is injected into the formation to raise the reservoir temperature, in the vicinity of injection, to the combustion temperature of the oil. Then, in a combustion stage, the injection of steam is continued and oxygen-containing gas is injected as well, so that local combustion of oil occurs. This results in further heating of the steam and the generation of hot combustion gases, increasing the mobility of the oil and creating pressure drive. The priming and combustion stages may be part of a cyclic steam stimulation ("huff and puff") method or a steam flooding method. Special expedients are provided for the safe use of oxygen and steam.

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