Steam injection profile control agent and process

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

1993-07-06

1994-10-25

Green, Anthony

Compositions: coating or plastic

Coating or plastic compositions

Alkali metal silicate containing

106600, 106603, 106638, 106802, 166261, 166292, 166294, 252 8551, 405266, 405267, 405269, C04B 1204, E21B 3313

Patent

active

053585658

ABSTRACT:
A method and composition for controlling the profile of a formation where temperatures higher than 400.degree. F. are encountered. An aqueous solution of an organoammonium silicate, alkali metal or ammonium silicate is injected into a zone of higher permeability in a formation. Subsequently, a spacer volume of a water-immiscible organic solvent is directed into said zone. Afterwards, a water-miscible organic solvent containing an alkylpolysilicate and an inorganic salt or a chelated calcium compound are injected into the higher permeability zone. A silicate cement is formed in-situ thereby substantially closing the higher permeability zone to fluid flow. Thereafter, a steam-flooding, water-flooding, carbon dioxide-flooding, or fire-flooding EOR operation is commenced in a lower permeability zone.

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