Where can CO2 be geologically stored?
The best rocks for CO2 storage are depleted oil and gas fields and deep saline formations. Potential storage sites will need to be carefully selected and managed in order to minimise any chance of CO2 leakage. Once the CO2 has been placed in the storage location, the wells will have to be sealed to ensure that the CO2 stays in place. On the surface, air and soil sampling can be used to detect potential of CO2 leakage whilst changes deep underground can be monitored by detecting sound (seismic), electromagnetic, gravity or density changes within the rock formations.
