Articles | Volume 12, issue 2
https://doi.org/10.5194/se-12-319-2021
https://doi.org/10.5194/se-12-319-2021
Research article
 | 
05 Feb 2021
Research article |  | 05 Feb 2021

Fault sealing and caprock integrity for CO2 storage: an in situ injection experiment

Alba Zappone, Antonio Pio Rinaldi, Melchior Grab, Quinn C. Wenning, Clément Roques, Claudio Madonna, Anne C. Obermann, Stefano M. Bernasconi, Matthias S. Brennwald, Rolf Kipfer, Florian Soom, Paul Cook, Yves Guglielmi, Christophe Nussbaum, Domenico Giardini, Marco Mazzotti, and Stefan Wiemer

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Cited articles

Aagaard, B. K., Skurtveit E., and Wangen, M.: Critical Factors for Considering CO2 Injectivity in Saline Aquifers, FME SUCCESS Synthesis report Volume 3, edited by: Miri, R. and Hellevang, H., pp. 24, 2018. 
Alemu, B. L., Aagaard, P., Munz, I. A., and Skurtveit, E.: Caprock interaction with CO2: A laboratory study of reactivity of shale with supercritical CO2 and brine, Appl. Geochem., 26, 1975–1989, 2011. 
Al Hosni, M., Vialle, S., Gurevich, B., and Daley, T. M.: Estimation of rock frame weakening using time-lapse crosswell: The Frio brine pilot project, Geophysics, 81, B235–B245, 2016. 
Amann, F., Wild, K. M., Loew, S., Yong, S., Thoeny, R., and Frank, E.: Geomechanical behaviour of Opalinus Clay at multiple scales: results from Mont Terri rock laboratory (Switzerland), Swiss J. Geosci., 110, 151–171, 2017. 
Blaesi, H. R., Moeri, A., and Bossart, P.: Results of the Phase 1 drilling campaign, Mont Terri Technical Report, TR96-01, Federal Office of Topography (swisstopo), Wabern, Switzerland, 1996. 
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Short summary
The success of the geological storage of carbon dioxide is linked to the availability at depth of a capable reservoir and an impermeable caprock. The sealing capacity of the caprock is a key parameter for long-term CO2 containment. Faults crosscutting the caprock might represent preferential pathways for CO2 to escape. A decameter-scale experiment on injection in a fault, monitored by an integrated network of multiparamerter sensors, sheds light on the mobility of fluids within the fault.