US 12,084,530 B2
Electro-responsive hydrogel for reservoir and downhole application
Amr Abdel-Fattah, Dhahran (SA); and Hala Sadeg, Safwa (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jun. 23, 2023, as Appl. No. 18/340,586.
Application 18/340,586 is a division of application No. 16/995,147, filed on Aug. 17, 2020, granted, now 11,807,700.
Prior Publication US 2023/0406979 A1, Dec. 21, 2023
Int. Cl. C08F 220/06 (2006.01); B29C 35/08 (2006.01); B33Y 70/10 (2020.01); B33Y 80/00 (2015.01); C08L 79/04 (2006.01); E21B 34/02 (2006.01); E21B 34/06 (2006.01); E21B 43/14 (2006.01); E21B 43/20 (2006.01)
CPC C08F 220/06 (2013.01) [B29C 35/08 (2013.01); B33Y 70/10 (2020.01); B33Y 80/00 (2014.12); C08L 79/04 (2013.01); E21B 34/025 (2020.05); E21B 34/066 (2013.01); E21B 43/14 (2013.01); C08G 2210/00 (2013.01); E21B 43/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for producing an electro-responsive hydrogel for use in a subterranean formation, the method comprising:
forming an inverse emulsion of acrylic acid and magnesium aluminum phyllosilicate dispersed in a continuous phase of toluene; and
polymerizing the acrylic acid of the inverse emulsion to form the electro-responsive hydrogel, wherein polymerizing the acrylic acid in the inverse emulsion to form the electro-responsive hydrogen comprises:
adding ammonium persulfate and N,N′-methylenebisacrylamide to the inverse emulsion;
allowing the acrylic acid of the inverse emulsion to polymerize and form a granular sample; and
mixing the granular sample and a basic salt solution to form a slurry.