Feasibility Study of Seismic Interferometry for CO2 Storage Monitoring - An Example from the Ketzin Site

Abstract

Seismic interferometry is a relatively low cost method compared with conventional seismic monitoring methods and can be performed together with microseismic and reservoir monitoring. These features make it a new potential tool for carbon dioxide storage monitoring. In this study, we acquired 6 nights of ambient noise data were recorded at the Ketzin experimental CO2 injection Site located in Ketzin, west of Berlin, Germany, in August 2013. An active survey was also acquired at the same time along of one line for a source test. Passive seismic interferometry was applied to the recorded noise data to reconstruct common shot gathers. The virtual shot gathers was processed to obtain a stacked section. The results show that the passive stacked sections are less coherent and low resolution compared with the active stacked section. However, we could also find some similar features to both the passive and active stacked sections in the shallow parts and even some agreement in the deeper parts.