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:
Sep. 13, 2005
Filed:
Nov. 27, 1995
Lignosulfonate-acrylic acid graft copolymers as sacrificial agents for carbon dioxide foaming agents
George Kalfoglou, Houston, TX (US);
John Prieditis, Houston, TX (US);
Grover Starr Paulett, Richmond, VA (US);
George Kalfoglou, Houston, TX (US);
John Prieditis, Houston, TX (US);
Grover Starr Paulett, Richmond, VA (US);
Texaco Inc., White Plains, NY (US);
Abstract
The invention is a method for improving conformance during a carbon dioxide foam flood, which comprises injecting into the formation an aqueous solution of about 0.05% to about 5% by weight of a carbon dioxide foaming surfactant, and about 0.05% to about 5% by weight of a lignosulfonate-acrylic acid graft copolymer having about 2% to about 70% by weight of acrylic acid, and injecting into the formation carbon dioxide to sweep the hydrocarbons towards a production well for recovery.