二氧化碳地质储存逃逸通道及环境监测研究

CO2 Geological Storage Leakage Routes and Environment Monitoring

CO2地质储存逃逸通道可分为人为逃逸通道、地质构造逃逸通道以及跨越盖层和水力圈闭逃逸通道三类.在CO2地质储存场地选址和场地勘查阶段,应高度重视区域地壳稳定性、地震危险性和CO2逃逸通道专门性地质调查评价工作,避免因CO2逃逸造成对人群健康和生态系统产生影响,导致地下水污染和诱发地质灾害发生.同时要对可能的CO2逃逸通道进行灌注前CO2背景值监测,灌注工程运营期CO2控制监测和封场后长期监测,确保CO2地质储存的有效性、安全性和持久性.

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.