Oxidized lignosulfonates as additives in oil recovery...

Details Oxidized lignosulfonates as additives in oil recovery... Oxidized lignosulfonates as additives in oil recovery...

E - Fixed Constructions

21

B

166/31

E21B 43/22 (2006.01)

Patent

CA 1107194

ABSTRACT OF THE DISCLOSURE A process for producing petroleum from subterranean formations is disclosed wherein production from the forma- tion is obtained by driving a fluid from and injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of oxidized lignosulfonate salt as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carries out by injecting the oxidized lignosulfonates into the formation through the injection well mixed with either a polymer, a surfactant solution and/or a micellar dispersion. This mixture would then be followed by a drive fluid such as water to push the chemicals to the production well. -I-

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