Long term impacts of cold CO2 injection on the caprock integrity

- We perform long-term thermo-hydro-mechanical simulations of cold CO2 injection.
- Thermal stresses in the reservoir may induce seismicity, enhancing its injectivity.
- The caprock tightens due to an increase in horizontal total stress, improving its stability.
- Accounting for thermal expansion of the grains is crucial in low porosity formations.
- Injecting cold CO2 should not be feared because of the thermal stresses reduction.