Recovery of petroleum with chemically treated high molecular wei

Details Recovery of petroleum with chemically treated high molecular wei Recovery of petroleum with chemically treated high molecular wei

1978-10-04

1980-11-18

Guynn, Herbert B.

Compositions

Leather or fur treating

166275, E21B 4322

Patent

active

042344336

ABSTRACT:
Plugging of reservoirs with high molecular weight polymers, e.g. partially hydrolyzed polyacrylamide, is overcome by chemically treating a polymer having an excessively high average molecular weight prior to injection into a reservoir with an oxidizing chemical, e.g. sodium hypochlorite, and thereafter incorporating a reducing chemical, e.g., sodium sulfite, to stop degradation of the polymer when a desired lower average molecular weight and flooding characteristics are attained.

REFERENCES:
patent: 3002960 (1961-10-01), Kolodny
patent: 3343601 (1967-09-01), Pye
patent: 3556221 (1971-01-01), Haws et al.
patent: 3749172 (1973-07-01), Hessert et al.
patent: 3822746 (1974-07-01), Gogarty
patent: 3842909 (1974-10-01), Rhudy et al.

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