CO2 storage and potential fault instability in the St. Lawrence Lowlands sedimentary basin (Quebec, Canada): Insights from coupled reservoir-geomechanical modeling

- CO2 injection rates control fluid pressure build-up and fault stability.
- A high permeability of reservoir units reduces the risk of fault reactivation.
- Fault permeability affects timing, localization, rate, length of shear slip.
- Sealing fault behavior causes asymmetric fluid pressure build-up and CO2 plume shape.
- Tensile fracturing postdates shear failure along fault, localizes below caprock units.