US 12,276,180 B2
Hydrogels for carbon sequestration and sealing zones in a wellbore
Hala Sadeg, Dhahran (SA); and Amr Abdel-Fattah, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on May 17, 2023, as Appl. No. 18/319,169.
Prior Publication US 2024/0384626 A1, Nov. 21, 2024
Int. Cl. E21B 41/00 (2006.01); C09K 8/42 (2006.01); C09K 8/44 (2006.01); E21B 33/138 (2006.01)
CPC E21B 41/0064 (2013.01) [C09K 8/426 (2013.01); C09K 8/44 (2013.01); E21B 33/138 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for sequestering carbon dioxide while treating a zone in a wellbore, comprising:
obtaining a hydrogel;
mixing the hydrogel with an aqueous amine solution comprising an amine compound to form an amine infused hydrogel (AIH);
exposing the AIH to a gas comprising carbon dioxide in a vessel before treating the zone in the wellbore until the AIH has reached saturation with the carbon dioxide, wherein the amine compound in the AIH absorbs the carbon dioxide, forming a well treatment composition comprising the AIH and absorbed carbon dioxide, and wherein the saturation of the AIH with the carbon dioxide is determined by measuring a pressure of the vessel; and
pumping the well treatment composition into a wellbore comprising a treatment zone, wherein the well treatment composition plugs the treatment zone.