Varying temperature oil recovery method

Details Varying temperature oil recovery method Varying temperature oil recovery method

E - Fixed Constructions

21

B

166/33

E21B 43/24 (2006.01)

Patent

CA 1194406

VARYING TEMPERATURE OIL RECOVERY METHOD (D#76, 012 -F) ABSTRACT The present invention is a sequenced method of increasing the injectivity of oil bearing formations and increasing hydrocarbon recovery. The method of the inven- tion is initiated by injecting an aqueous fluid at an am- bient temperature into the formation through an injection well while concurrently recovering fluid at a production well. The first injection stage is followed by the injec- tion of fluid of gradually increasing temperature until a temperature of about 75°-100°C is reached. Finally, steam is injected into the formation. -I-

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