Method of oil recovery using compositions of carbon dioxide and compounds to increase carbon dioxide wettability of formations

US12286589B2 · kind B2 · utility

Assignees

• University of Pittsburgh—Of the Commonwealth System of Higher Education · US
• The United States Government as Represented by the Department of Energy · US

Inventors

• Robert M. Enick · Pittsburgh, US
• Deepak Tapriyal · Bethel Park, US
• Angela Goodman Hanson · Pittsburgh, US
• Dustin Crandall · Morgantown, US

Key dates

• Filing date: Jul 9, 2020
• Grant date: Apr 29, 2025
• Expiry date: Sep 6, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/604
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method of recovering hydrocarbons from a subterranean formation includes injecting into the subterranean formation a composition including carbon dioxide and at least one carbon-dioxide-soluble compound under conditions favorable to diffusion into and adsorption of the carbon-dioxide-soluble compound on the subterranean formation so that oil-wettability is decreased or water wettability or CO2-philicity is increased in at least a portion the subterranean formation.