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:
Aug. 20, 2013
Filed:
Feb. 05, 2009
Julian Richard Barnes, Amsterdam, NL;
Kirk Herbert Raney, Houston, TX (US);
Thomas Carl Semple, Friendswood, TX (US);
Paul Gregory Shpakoff, Houston, TX (US);
Johan Paul Smit, Amsterdam, NL;
Julian Richard Barnes, Amsterdam, NL;
Kirk Herbert Raney, Houston, TX (US);
Thomas Carl Semple, Friendswood, TX (US);
Paul Gregory Shpakoff, Houston, TX (US);
Johan Paul Smit, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
A method of treating a hydrocarbon containing formation is described. The method includes (a) providing a hydrocarbon recovery composition to at least a portion of the hydrocarbon containing formation, wherein (i) when the salinity of the brine is from about 2 wt % to about 4 wt %, the composition comprises a blend of a Cinternal olefin sulfonate and a Cinternal olefin sulfonate wherein the weight ratio of the Cinternal olefin sulfonate to the Cinternal olefin sulfonate is from about 90:10 to about 70:30 and (ii) when the salinity of the brine is greater than about 4 wt % up to about 13 wt % the composition comprises a blend of a Cinternal olefin sulfonate and a Cinternal olefin sulfonate wherein the weight ratio of the Cinternal olefin sulfonate to the Cinternal olefin sulfonate is from about 90:10 to about 70:30; and (b) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation.