Curtis M Campbell

US Patent:

7770641, Aug 10, 2010

Filed:

Dec 18, 2007

Appl. No.:

11/959151

Inventors:

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

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 43/22
E21B 43/16

US Classification:

1662701, 166400, 1663051, 166300

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.

Address:

3087 N 1225 E, Ogden, UT 84414

Phone:

8017823718

VIN:

1HGCM56827A127673

Make:

HONDA

Model:

ACCORD

Year:

2007