US 12,297,730 B1
Methods of stimulating geological formations with acidic fracturing fluids
Serguey Viktorov Arkadakskiy, Dhahran (SA); Zeyad Tareq Ahmed, Dhahran (SA); and Noushad Kunnummal, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jan. 25, 2024, as Appl. No. 18/422,524.
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 43/27 (2006.01); E21B 41/00 (2006.01)
CPC E21B 43/27 (2020.05) [E21B 41/0064 (2013.01)] 19 Claims
 
1. A method of stimulating a geological formation, the method comprising:
positioning an acidic fracturing fluid comprising dissolved CO2 and at least one of CO2 microbubbles or CO2 nanobubbles in the geological formation, wherein the acidic fracturing fluid is injected in the geological formation at a pressure above a fracturing pressure of the geological formation thereby hydraulically fracturing the geological formation;
acidizing the geological formation with the acidic fracturing fluid, thereby increasing a permeability of the geological formation; and
sequestering CO2 by reacting the CO2 in the acidic fracturing fluid with reactive rock in the geological formation to form carbonates.