Method for oil recovery using a polymer containing fluid

Details Method for oil recovery using a polymer containing fluid Method for oil recovery using a polymer containing fluid

1983-12-27

1985-10-22

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166246, 166274, 166275, 166294, 252 855D, 523130, 536 41, E21B 33138, E21B 4322

Patent

active

045482683

ABSTRACT:
A process for recovering hydrocarbons from a subterranean hydrocarbon bearing formation penetrated by injection well and a production well includes the steps of injecting into the formation via an injection well an aqueous drive fluid comprising water and more than about 200 parts per million of Beta-(1.fwdarw.6)-D-glucan having an average molecular weight of more than about 2.times.10.sup.4 and comprising recurring units of the disaccharide gentiobiose: ##STR1## forcing said aqueous drive fluid through the formation and recovering hydrocarbons from the production well. The process also includes using a more concentrated solution of the glucan, more than about 2,000 parts per million, as a vertical conformance agent. The invention also includes a concentrate of the glucan in dimethylsulfoxide or in a 4 molar or higher concentration of aqueous urea which is diluted to form the aqueous drive fluid.

REFERENCES:
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patent: 3301848 (1967-01-01), Halleck
patent: 3373810 (1968-03-01), Williams
patent: 3779315 (1973-12-01), Boneau
patent: 4011910 (1977-03-01), Rhudy et al.
patent: 4210204 (1980-07-01), Christopher, Jr. et al.
patent: 4338203 (1982-07-01), Hunter
patent: 4347146 (1982-08-01), Abdo
patent: 4352741 (1982-10-01), Wernau
patent: 4457372 (1984-07-01), Doster et al.
patent: 4495346 (1985-01-01), Anderson et al.

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