Invention Grant
- Patent Title: Enhanced oil recovery compositions and methods thereof
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Application No.: US16421909Application Date: 2019-05-24
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Publication No.: US10851629B2Publication Date: 2020-12-01
- Inventor: Varadarajan Dwarakanath , Robert G. Shong , Gregory A. Winslow , Taimur Malik , Marlon Solano
- Applicant: Chevron U.S.A. Inc.
- Applicant Address: US CA San Ramon
- Assignee: CHEVRON U.S.A. INC.
- Current Assignee: CHEVRON U.S.A. INC.
- Current Assignee Address: US CA San Ramon
- Main IPC: E21B43/16
- IPC: E21B43/16 ; C09K8/58 ; C09K8/584 ; C09K8/588 ; C08L5/00 ; C08L81/08

Abstract:
Additional oil recovery is obtained from a reservoir with a composition comprising at least a coupling solvent typically employed in waterborne coating compositions. Provided herein are embodiments of methods of recovering hydrocarbons using at least one coupling solvent, such as an oxygenated coupling solvent. The coupling solvent increases the mutual solubility with water at the injection temperature to facilitate the mixing and injection, particularly with an optional co-solvent. The coupling solvent helps mitigate formation plugging and improve performance when injected into a formation, as the solvent mixture moves from being miscible in the injection field water to being miscible in the reservoir oil, mobilizing the reservoir oil to increase oil recovery.
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