Chrome lignosulfonates as additives in oil recovery process...

Details Chrome lignosulfonates as additives in oil recovery process... Chrome lignosulfonates as additives in oil recovery process...

E - Fixed Constructions

21

B

31/19

E21B 43/22 (2006.01) C09K 8/584 (2006.01) C09K 8/588 (2006.01)

Patent

CA 1111237

CHROME LIGNOSULFONATES AS ADDITIVES IN OIL RECOVERY PROCESSES INVOLVING CHEMICAL RECOVERY AGENTS (D#76,346-F) ABSTRACT OF THE DISCLOSURE A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of a chrome lignosulfonate complex as a sacrifical agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carried out by injecting the chrome lignosulfonate complexes into the formation through the injection well ahead of or 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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