CO2 Geological Storage Leakage Routes and Environment Monitoring

There are three CO2 geological storage leakage routes,i.e.,man-made escape channels(perfusion wells,monitoring wells and abandoned wells in the original site),tectonic leakage channels(faults,seal fissures,ground fissures and earthquake) and leaking through water traps and seal.During site selection and exploration of carbon dioxide geological storage,it is necessary to specialized geological survey and assessment work,including regional crustal stability,seismic risk and CO2 leakage routes.The population health and ecosystems damage,groundwater pollution and geological disasters caused by CO2 leakage should be avoided.At the same time,potential CO2 leakage routes should be monitored for a long time before perfusion,during infusion and after post-closure,in order to ensure the effectiveness,safety and durability of CO2 geological storage.