Evaluation of CO2 Injection Induced Fracture using 1D Geomechanic Model for Near Wellbore Caprock Integrity Assurance

This paper showcase how thermal induced fracture might be able to jeopardize caprock integrity if not properly mitigated. The injection of colder fluid will induce thermal stress into the formation and ultimately lower the stress of the storage interval. At the same time, increasing reservoir pressure would also reduce the stress contrast and at certain point, the fracture would be able to propagate vertically. The evaluation is meant to showcase the workflow and emphasize the importance of monitoring downhole operating condition including temperature. Furthermore, this workflow could be further utilized to better assure caprock integrity and select point of injection where the caprock is thicker than the anticipated vertical fracture propagation.