Articles | Volume 13, issue 12
https://doi.org/10.5194/se-13-1823-2022
https://doi.org/10.5194/se-13-1823-2022
Research article
 | 
05 Dec 2022
Research article |  | 05 Dec 2022

Insights into the interaction of a shale with CO2

Eleni Stavropoulou and Lyesse Laloui

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Latest update: 21 Feb 2024
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Short summary
Shales are identified as suitable caprock formations for geolocigal CO2 storage thanks to their low permeability. Here, small-sized shale samples are studied under field-representative conditions with X-ray tomography. The geochemical impact of CO2 on calcite-rich zones is for the first time visualised, the role of pre-existing micro-fissures in the CO2 invasion trapping in the matererial is highlighted, and the initiation of micro-cracks when in contact with anhydrous CO2 is demonstrated.