US 12,460,513 B1
Method for carbon dioxide storage utilizing carbon dioxide sequestration in an anhydrite-rich formation
Isah Mohammed, Dhahran (SA); Dhafer Abdullah Al Shehri, Dhahran (SA); Abubakar Isah, Dhahran (SA); and Mohamed Mahmoud, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Nov. 26, 2024, as Appl. No. 18/961,260.
Int. Cl. E21B 41/00 (2006.01); C01F 11/18 (2006.01); C01F 11/46 (2006.01)
CPC E21B 41/0064 (2013.01) [C01F 11/188 (2013.01); C01F 11/462 (2013.01); C01P 2002/70 (2013.01); C01P 2002/82 (2013.01); C01P 2002/85 (2013.01); C01P 2004/03 (2013.01)] 20 Claims
 
1. A method of carbon dioxide storage, comprising:
injecting a brine solution into a subterranean anhydrite-rich formation, wherein the subterranean anhydrite-rich formation is anhydrous and free of hydrocarbons;
injecting carbon dioxide into the subterranean anhydrite-rich formation;
reacting the carbon dioxide with the subterranean anhydrite-rich formation in the presence of the brine solution to form one or more minerals thereby sequestering the carbon dioxide in the subterranean anhydrite-rich formation,
wherein a temperature in the subterranean anhydrite-rich formation is from 300 to 365 K,
wherein a pressure in the subterranean anhydrite-rich formation is from 90 to 120 bar,
wherein the brine solution comprises sodium chloride, calcium chloride, magnesium chloride, sodium bicarbonate, and sodium sulfate,
wherein the brine solution comprises ionic concentrations of Na+ in a range from 5,000 to 50,000 parts per million (ppm), Ca2+ in a range from 100 to 1,500 ppm, Mg2+ in a range from 500 to 5,000 ppm, SO42− in a range from 1,000-9,000 ppm, Cl− in a range from 10,000-70,000 ppm, and HCO3− in a range from 10-500 ppm, and
wherein a mineral content of the subterranean anhydrite-rich formation after the reacting comprises 80 to 90 weight percent (wt. %) anhydrite, 1 to 5 wt. % calcite, 5 to 10 wt. % dolomite, 1 to 5 wt. % scapolite, 0.1 to 1 wt. % quartz; 0.1 to 1 wt. % feldspar, and 0.1 to 1 wt. % siderite.