Patent ID: 11834933

Abstract:
A method of subsurface sequestration of CO2 in a subsurface formation, the method including: identifying one or more subsurface sequestration locations in the subsurface formation, wherein the subsurface formation includes a first region, a second region, a first well located within the first region, a second well located within the second region, formation water, and hydrocarbons naturally present in the subsurface formation; producing the formation water and the hydrocarbons from the first well while concurrently injecting an aqueous CO2 solution into the second well; and allowing the aqueous CO2 solution to sink as a negatively buoyant fluid below the formation water and hydrocarbons, thereby sequestering the CO2 in the second region of the subsurface formation and wherein the aqueous CO2 solution has a greater density than the formation water and the hydrocarbons, making the aqueous CO2 solution negatively buoyant in the subsurface formation.