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:
Jul. 11, 1989
Filed:
Sep. 02, 1988
Applicant:
Inventor:
Hiemi K Haines, Englewood, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166273 ; 166274 ;
Abstract
A zone of a subterranean formation containing a low-viscosity crude oil which has already been waterflooded to completion is sequentially flooded with alternating slugs of produced gas and water to produce incremental amounts of the oil. The zone is characterized as a low-permeability zone having mixed geology, i.e., containing two or more rocks of differing permeability randomly distributed throughout the zone.