Steam injection profile control agent and process

Details Steam injection profile control agent and process Steam injection profile control agent and process

E - Fixed Constructions

21

B

E21B 43/22 (2006.01) C09K 8/84 (2006.01) E21B 43/16 (2006.01) E21B 43/24 (2006.01) E21B 43/243 (2006.01)

Patent

CA 2056856

F-5960-L(PAC) ABSTRACT A method for controlling the profile of a formation where temperatures higher than 400 degrees F are encountered. An aqueous solution of potassium silicate is injected into a zone of greater permeability in a formation. Afterwards, an alcoholic solution of hydrated calcium chloride is injected into the greater permeability zone. Calcium silicate is formed in-situ thereby substantially reducing the permeability of the higher permeability zone. Thereafter, a steam-flooding or fire-flooding operation is commenced in a lower permeability zone.

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