Polydialkylsilalkylene polymer useful in enhanced oil recovery u

Details Polydialkylsilalkylene polymer useful in enhanced oil recovery u Polydialkylsilalkylene polymer useful in enhanced oil recovery u

1990-02-22

1991-04-09

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

521 97, 521133, 521154, 252 8551, 252 8554, 524361, 524362, 524379, 524385, 524474, 556430, 556431, 556434, 556435, 528 35, 528 37, C08K 509

Patent

active

050065840

ABSTRACT:
A polymer is disclosed that is useful in increasing the viscosity of carbon dioxide. That polymer comprises a polydialkylsilalkylene polymer; wherein the dialkyl group is preferably dimethyl, methylethyl, or diethyl; and the alkylene group is preferably ethylene or methylene. Preferably, the polymer is polydimethylsilalkylene. That polymer can be used in a method for recovering oil from an underground oil-bearing earth formation penetrated by an injection well and a producing well, in which method carbon dioxide is injected into the formation to displace oil towards the producing well from which oil is produced to the surface. The viscosity of the carbon dioxide injected into the formation is increased at least three-fold by the presence of a sufficient amount of the polydialkylsilalkylene polymer and a sufficient amount of a cosolvent to form a solution of the polymer in the carbon dioxide.

REFERENCES:
patent: 3293194 (1966-12-01), Lovie et al.
patent: 3304271 (1967-02-01), Baney
patent: 4159259 (1979-06-01), Yajima et al.
patent: 4208506 (1980-06-01), Deichert et al.
patent: 4652624 (1987-03-01), Allen et al.
patent: 4852651 (1989-08-01), Davis
Noll, Chemistry and Technology of Silicones, (New York, Academic Press, 1968), pp. 356-363.

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