Ultimately, the CO2 must be stored underground permanently if CO2-EOR is to play a role in combatting climate change. Today’s CO2-EOR operations are carried out with the primary objective of maximising oil output with limited or no focus on CO2 storage. Moving to an EOR+ model, with a dual objective of permanent CO2 storage, will require a shift from current practice and involve taking on additional activities associated with monitoring and verification of the stored CO2. At a minimum, these activities include: