The In Salah Joint Venture carbon capture and storage project at Krechba, Algeria began injecting CO2 in 2004. This study makes use of microseismic event data recorded by a single geophone. Information from shear waves enables fracture directions and densities to be inferred and we find fractures striking N145°E, in agreement with the regional direction of maximum horizontal stress. There is no evidence for any temporal change in shear-wave splitting parameters in the time frame studied. This implies that CO2 injection is reactivating pre-existing fractures. We are able to obtain only very approximate event locations which suggest that events occur at or below the reservoir level, with no change over time.
|Title of host publication||Sustainable Earth Sciences, SES 2013: Technologies for Sustainable Use of the Deep Sub-Surface|
|Publication status||Published - 1 Dec 2013|
|Event||2nd Sustainable Earth Sciences Conference and Exhibition: Technologies for Sustainable Use of the Deep Sub-Surface, SES 2013 - Pau, France|
Duration: 30 Sep 2013 → 4 Oct 2013
|Conference||2nd Sustainable Earth Sciences Conference and Exhibition: Technologies for Sustainable Use of the Deep Sub-Surface, SES 2013|
|Period||30/09/13 → 4/10/13|