E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/24, 166/33
E21B 43/20 (2006.01) C08G 8/36 (2006.01) C09K 8/588 (2006.01) E21B 43/22 (2006.01)
Patent
CA 1198274
ABSTRACT The method of recovering petroleum from a subterranean reservoir pre- ferably comprising the steps of: 1) introducing though an injection well a predeter- minable amount of a polyalkylene oxide adduct of a fusible, aromatic hydrocarbon Soluble synthetic resin which contains between about 4 to about 16 phenolic groups and is a condensate of a substituted phenol and an aldehyde, said condensate resin being further condensed with ethylene oxide and at least one other alkylene oxide containing 3 or 4 carbon atoms and in such amounts that the weight ratio of condensed alkylene oxide moiety to phenolic resin moiety ranges from about 1-to-1 to about 100-to-1 and the weight percentage of ethylene oxide residues to the total of all alkylene oxide residues ranges from about 20% to about 75%; said adduct (a) being soluble in water to the extent of about 1° or more at 25°C and (b) said 1% solution having a cloud point of less than about 70°C; 2) contacting said petroleum in said reservoir with an effective thin film forming amount of said polyalkylene oxide adduct; 3.) Introducing into the formation an aqueous medium to urge said petroleum toward and through a producing well.
424747
Blair Charles M. Jr.
Olsen Raymond P.
Stout Charles A.
Borden Ladner Gervais Llp
Magna Corporation
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