The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2010
Filed:
Dec. 18, 2007
Varadarajan Dwarakanath, Houston, TX (US);
Curtis Bay Campbell, Hercules, CA (US);
Tanmay Chaturvedi, Houston, TX (US);
Theresa Ann Denslow, Concord, CA (US);
Adam Jackson, League City, TX (US);
Taimur Malik, Houston, TX (US);
Gabriel Prukop, Katy, TX (US);
Sophany Thach, Houston, TX (US);
Varadarajan Dwarakanath, Houston, TX (US);
Curtis Bay Campbell, Hercules, CA (US);
Tanmay Chaturvedi, Houston, TX (US);
Theresa Ann Denslow, Concord, CA (US);
Adam Jackson, League City, TX (US);
Taimur Malik, Houston, TX (US);
Gabriel Prukop, Katy, TX (US);
Sophany Thach, Houston, TX (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A method for enhancing oil recovery includes the step of providing a subsurface reservoir containing hydrocarbons therewithin. A wellbore is provided in fluid communication with the subsurface reservoir. A surfactant-polymer solution is formed for injection into the reservoir. The surfactant-polymer solution is formed by mixing a composition with at least one surfactant, at least one polymer, and at least one co-solvent or co-surfactant such that the surfactant-polymer solution is clear and aqueous stable. The surfactant-polymer solution is injected through the wellbore into the reservoir. A chaser solution is formed for injection into the reservoir. The chaser solution has an additional predetermined quantity of the co-solvent or co-surfactant. The chaser solution is injected through the injection wellbore into the reservoir to increase the production of hydrocarbons from the reservoir while maintaining the clear and aqueous stability of the surfactant-polymer solution.