Method for carbon dioxide storage utilizing carbon dioxide sequestration in an anhydrite-rich formation

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.