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:
Mar. 26, 2024
Filed:
May. 21, 2021
S.p.c.m. SA, Andrezieux-Boutheon, FR;
Cédrick Favero, Andrezieux-Boutheon, FR;
S.P.C.M. SA, Andrezieux-Boutheon, FR;
Abstract
A method is provided for enhanced oil recovery in a subterranean carbonate formation by injecting an aqueous composition having at least one water-soluble polymer containing acrylamidopropyltrimethylammonium chloride (APTAC). The water soluble polymer used in the method is an amphoteric polymer and contains at least one anionic monomer, wherein the number of acrylamidopropyltrimethylammonium chloride units in the water-soluble polymer is between 20 and 99.9 mol percent relative to total number of moles of monomer units of the water-soluble polymer. The method is advantageous because it improves the efficacy of enhanced oil recovery in subterranean carbonate formations using specific water-soluble polymers.