Chevron Oronite Company LLC

Chevron U.s.a. Inc.

Theresa Ann Denslow

Curtis Bay Campbell

Varadarajan Dwarakanath

Taimur Malik

Adam C Jackson

Gabriel Prukop

Tanmay Chaturvedi

Sophany Thach

Adam Christopher Jackson

The present invention is directed to an isomerized alpha olefin sulfonate and a method of making the same wherein the isomerized alpha olefin sulfonate is derived from sulfonating an isomerized alpha olefin with sulfur trioxide in the presence of air thereby producing an isomerized alpha olefin sulfonic acid, wherein the isomerized alpha olefin is derived from the isomerization of C-Cnormal alpha olefins; and neutralizing the isomerized alpha olefin sulfonic acid with a source of a mono-valent cation.

Isomerized alpha olefin sulfonate and method of making the same

The present invention is directed to an enhanced oil recovery formulation which comprises:

Enhanced oil recovery surfactant formulation and method of making the same

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.

Method for enhancing oil recovery with an improved oil recovery surfactant

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Concord, CA, United States of America

Theresa Ann Denslow