Lost circulation mitigation using mineralization of CO2 in the subsurface

A method for carbon dioxide (CO2) sequestration in a wellbore, comprising:

• during drilling of a wellbore, locating a lost circulation zone in the wellbore;
• flushing drilling mud from the wellbore to prepare the lost circulation zone for lost circulation mitigation;
• injecting, using a first fluid delivery system, a cleaning solution into the wellbore;
• injecting, using a second fluid delivery system, a composition for CO2 sequestration into the wellbore, wherein the composition for CO2 sequestration comprises;
• a brine solution,
• an alkaline compound, and
• from 0.1% to 5.0% by weight of a catalyst comprising an enzyme or a metal selected from the group consisting of nickel, zinc, arsenic, copper, molybdenum, cobalt, and combinations thereof;
• injecting, using a gas delivery system, a volume of CO2 into the wellbore;
• mineralizing, in the wellbore, the alkaline compound and the volume of CO2 to produce an alkaline carbonate compound;
• and
• injecting, using a third fluid delivery system, drilling mud into the wellbore, and resuming drilling operations.