US 11,697,700 B2
Synthesis of a cationic surfmer and its copolymers for enhanced oil recovery
Xuan Zhang, Beijing (CN); Ming Han, Beijing (CN); and Limin Xu, Beijing (CN)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jul. 22, 2020, as Appl. No. 16/935,943.
Prior Publication US 2022/0025090 A1, Jan. 27, 2022
Int. Cl. E21B 43/16 (2006.01); C09K 8/58 (2006.01); C08F 220/58 (2006.01); C08F 220/56 (2006.01); C07C 231/12 (2006.01); C07C 233/38 (2006.01); C09K 8/584 (2006.01); C09K 8/588 (2006.01)
CPC C08F 220/585 (2020.02) [C07C 231/12 (2013.01); C07C 233/38 (2013.01); C08F 220/56 (2013.01); C09K 8/584 (2013.01); C09K 8/588 (2013.01); E21B 43/16 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A subterranean formation treatment fluid for treating a subterranean formation comprising a quaternary ammonium surfmer having the following general formula (II):
R5—CH═CH—R6—COHN—R7—N+R1R2R4(Br−)  (II)
where:
R1 and R2 are independently H or a C1-C3 alkyl,
R4 is a C3-C6 alkyl having a terminal olefin double bond group,
R5 is a C8-C16 alkyl,
R6 is a C9-C16 alkyl, and
R7 is a C2-C6 alkyl.