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:
Nov. 14, 1995
Filed:
Apr. 11, 1994
Donald C McClure, Parker, CO (US);
Hiemi K Haines, Englewood, CO (US);
Marathon Oil Company, Findlay, OH (US);
Abstract
A process for recovering oil from a multiple-layered heterogeneous reservoir with a higher oil saturation in the lower permeability layers than in the higher permeability layers. An aqueous surfactant solution is injected into the formation, where it imbibes into the lower permeability layers and displaces a first quantity of oil into the higher permeability layers. Next, a first aqueous fluid is injected to sweep the displaced oil from the higher permeability layers into at least one production well. A gas is injected into the formation to displace a second quantity of oil from the lower permeability layers. The second aqueous fluid is injected to sweep the displaced oil into at least one production well. The process may be repeated one or more times.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile