US 11,851,610 B2
Sequestration of carbon dioxide in organic-rich geological formations
Katherine Leigh Hull, Houston, TX (US); Hasmukh A. Patel, Houston, TX (US); Younane N. Abousleiman, Houston, TX (US); David Jacobi, Houston, TX (US); and Poorna Srinivasan, Houston, TX (US)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Dec. 14, 2021, as Appl. No. 17/550,302.
Prior Publication US 2023/0183558 A1, Jun. 15, 2023
Int. Cl. E21B 41/00 (2006.01); C09K 8/594 (2006.01); C09K 8/72 (2006.01)
CPC C09K 8/594 (2013.01) [C09K 8/72 (2013.01); E21B 41/0064 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for subsurface sequestration of carbon dioxide, the method comprising:
into a subterranean zone having an average total organic content of at least three weight percent, alternating injecting an oxidizer having a redox potential of at least 0.5 volts with injecting a carbon dioxide mixture, the oxidizer increasing a surface area of organic matter in the subterranean zone and the carbon dioxide mixture comprising at least sixty-five weight percent carbon dioxide and less than thirty-five weight percent water; and
sequestering, at least in part by adsorption of carbon dioxide in the organic matter, at least a portion of the carbon dioxide mixture in the subterranean zone.