Passive seismic has the potential to unlock opportunities to characterise the subsurface and its changes without using often invasive active seismic sources. In order to utilise the ambient seismic energy, CRGC use various interferometric methods that compare received wavefield across different receivers to recover some of the information that is not available when not using active sources.
Seismic imaging and subsurface characterisation without the use of active sources has gained importance due to the need for both monitoring microseismic events and simplified acquisition of data. The team’s focus in the area of passive seismic and interferometry includes: using drilling activities as a seismic source; passive imaging of diffractors and their characterisation and separation from microseismic events; and, generating shear-wave sources at the locations of 3C geophones in VSP type experiments for imaging and anisotropy estimation.
Researchers: Prof. Andrej Bona, Prof. Roman Pevzner