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:
Dec. 20, 1983
Filed:
Nov. 10, 1980
Applicant:
Inventor:
Billy G Hurd, Dallas, TX (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166273 ; 166274 ;
Abstract
An improved recovery process is provided for fluent petroleum in a porous formation having spaced injection means and production well recovery means which includes a concentrated brine drive and surfactant carrier system. By injecting an aqueous drive medium having gradually decreasing brine concentration, surfactant transport and petroleum recovery efficiency are improved. Advantageously, an effective aqueous surfactant composition is formulated containing a water-soluble ether-linked sulfonate surfactant, a cosurfactant alcohol, and at least one cosurfactant or sacrificial sulfonate material in a concentrated brine carrier.