4316 Deployment of Monitoring Techniques for CO_2 Geological Sequestration
Details
One of the biggest barriers to realize the CO_2 geological sequestration is the uncertainty over the safety and long-term stability of stored CO_2. Modelling-based risk assessment and monitoring techniques are ways to assure such issues on safety and stability. However, it is difficult to make a universal procedure of monitoring deployment scheme due to the complexity of geological formations and leakage mechanisms. Therefore, the reservoir type is categorized into three types, and three levels of monitoring scheme are proposed for different purpose of monitoring. The first level is a simple monitoring to detect the unexpected leakage based ondirect monitoring near wellbore and remote sensing methods. The second level is to monitor the underground CO_2 migration to find fluid migration pathways using geophysical methods. The third level is a quantitative evaluation of fluid migration volume with intensive geophysical monitoring including permanent sensors.
