	US 12,331,618 B2
	System and method for carbon dioxide storage and geothermal heat mining in depleted gas, gas condensate or oil reservoirs
Hon Chung Lau, Bellaire, TX (US); and Kai Zhang, Calgary (CA)
Filed by Low Carbon Energies LLC, Bellaire, TX (US)
Filed on May 8, 2023, as Appl. No. 18/144,705.
Claims priority of provisional application 63/339,336, filed on May 6, 2022.
Prior Publication US 2023/0358120 A1, Nov. 9, 2023
Int. Cl. E21B 43/16 (2006.01); E21B 41/00 (2006.01)

CPC E21B 41/0064 (2013.01) [E21B 43/164 (2013.01)]

8 Claims

1. A method for storing carbon dioxide, comprising:

first identifying a gas condensate reservoir including a plurality of injection wells and a plurality of production wells;

then at least partially depleting the reservoir; wherein during the depleting, the reservoir pressure is decreasing;

then performing enhanced recovery of gas condensate on the reservoir, wherein during the performing, a first quantity of carbon dioxide is injected into the plurality of injection wells of the reservoir for expulsion of the gas condensate left in the reservoir;

then performing carbon dioxide heat mining, wherein during the heat mining, a second quantity of carbon dioxide is injected by a plurality of injection wells into the reservoir and both of the first and second quantities of carbon dioxide are subsequently produced to the surface from the reservoir for capture and conversion of geothermal energy of the first and second quantities of carbon dioxide into electricity; and

then storing a third quantity of carbon dioxide in the reservoir, wherein during the storing, all of the plurality of production wells are shut-in and the first, second, and third quantities of carbon dioxide are injected into the reservoir for permanent storage.