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. 27, 1976
Filed:
Mar. 31, 1975
Applicant:
Inventor:
Larry J Douglas, Denver, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166252 ; 166275 ;
Abstract
Where a micellar displacement fluid interacts with the rock of a particular reservoir to produce a negative surface potential, the least adsorption of surfactant occurs and slug instability due to surfactant loss is minimized. Thus, micellar displacement fluid integrity can be increased by selecting slug components which produce a more negative surface potential at the fluid-rock interface compared to the surface potential of the rock formation fluids prior to injection of the micellar system.