Process for secondary recovery

Details Process for secondary recovery Process for secondary recovery

1981-02-11

1982-08-10

Guynn, Herbert B.

Compositions

Leather or fur treating

166275, 524424, 524428, 524475, 524547, E21B 4322

Patent

active

043437125

ABSTRACT:
Hydrocarbons are recovered from a subterranean hydrocarbon-bearing formation penetrated by an injection well and a production well by displacing hydrocarbons toward the production well using a drive fluid such as water thickened with a copolymer of acrylamide and vinyl sulfonic acid or salts thereof or with a copolymer of acrylamide and styrene sulfonic acid or salts thereof as well as these same copolymers alkoxylated with an alkylene oxide. Optionally, the drive fluid can be saturated with carbon dioxide, nitrogen, natural gas or mixtures of these gases.

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patent: 2808397 (1957-10-01), Stroh et al.
patent: 3079336 (1963-02-01), Stright et al.
patent: 3709297 (1973-01-01), Christopher et al.
patent: 3779917 (1973-12-01), Norton et al.
patent: 3804173 (1974-04-01), Jennings
patent: 4044831 (1977-08-01), Allen
patent: 4218326 (1980-08-01), Crouch et al.
patent: 4228018 (1980-10-01), Hunter

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