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The processes and conditions underpinning induced seismicity associated with deep geothermal operations are still not sufficiently well understood to make useful predictions as to the likely seismic response to reservoir development and exploitation. The empirical data include only a handful of well-monitored EGS experiments; models are consequently poorly constrained. Unfortunately, datasets of well-monitored deep hydrothermal experiments are missing and empirical constraints of induced seismicity models for these cases do not exist. Given that the majority of the projects underway or planned in Europe are of the hydrothermal type, there is hope that this deficit can be remedied in the near future through a close cooperation of geothermal industry, science and public authorities. This is where the GeoBest project comes to play. By supporting selected pilot project for a limited time, SED facilitates the dialog with geothermal industry. Besides of the unique opportunity to collect high quality seismic data and being able to access relevant project data, gaining first hand practical experience in this field is of paramour importance for the development of significant best practice guidlines. |
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| Project Leader al SED | Toni Kraft |
| Partecipanti del SED | INDU group |
| Finanziamento | Bundesamt für Energie |
| Durata | 2011-2015 |
| Parole chiavi | Enhanced Geothermal System (EGS); Induced seismicity; High-precision hypocenter locations; Activated faults |
| Settore di ricerca | Induced Seismicity, Earthquake Statistics, Seismotectonics, Real-time monitoring |
Deichmann, N., Kraft, T. and Evans, K.F. (2014). Identification of faults activated during the stimulation of the Basel geothermal project from cluster analysis and focal mechanisms of the larger magnitude events. Geothermics 52, 84-97. doi: 10.1016/j.geothermics.2014.04.001
Diehl, T., Kraft, T., Kissling, E., Deichmann, N., Clinton, J. and Wiemer, S. (2014). High-precision relocation of induced seismicity in the geothermal system below St. Gallen (Switzerland). EGU General Assembly Conference Abstracts 16, 12541.
Edwards, B., Kraft, T., Cauzzi, C., Kastli, P. and Wiemer, S. (2015). Seismic monitoring and analysis of deep geothermal projects in St Gallen and Basel, Switzerland. Geophys. J. Int. 201, 1020-1037.
Evans, K.F., Zappone, A., Kraft, T., Deichmann, N. and Moia, F. (2012). A survey of the induced seismic responses to fluid injection in geothermal and CO2 reservoirs in Europe. Geothermics 41, 30-54. doi: 10.1016/j.geothermics.2011.08.002
Goertz, A., Riahi, N., Kraft, T. and Lambert, M. (2012). Modeling Detection Thresholds of Microseismic Monitoring Networks. 2012 SEG Annual Meeting. Society of Exploration Geophysicists.
Kraft, T., Mignan, A. and Giardini, D. (2013). Optimization of a large-scale microseismic monitoring network in northern Switzerland. Geophysical Journal International 195, 474-490. doi: 10.1093/gji/ggt225
Kraft, T., Wiemer, S., Deichmann, N., Diehl, T., Edwards, B., Guilhem, A., Haslinger, F. et al. (2013). The ML 3.5 earthquake sequence induced by the hydrothermal energy project in St. Gallen, Switzerland. AGU Fall Meeting Abstracts 1, 3.
Kraft, T. and Deichmann, N. (2014). High-precision relocation and focal mechanism of the injection-induced seismicity at the Basel EGS. Geothermics 52, 59-73. doi: 10.1016/j.geothermics.2014.05.014
Kraft, T. (2015). A high-resolution ambient seismic noise model for Europe. EGU General Assembly Conference Abstracts 16, 12407.
Kraft, T. et al. (2015). Lessons learned from the 2013 ML3.5 induced earthquake sequence at the St. Gallen geothermal site. Schatzalp Workshop on Induced Seismicity, Davos, Switzerland.
Obermann, A., Kraft, T., Larose, E. and Wiemer, S. (2015). Potential of ambient seismic noise techniques to monitor the St. Gallen geothermal site (Switzerland). J. Geophys. Res. Solid Earth 120(6), 4301–4316. doi: 10.1002/2014JB011817
Plenkers, K., Husen, S. and Kraft, T. (2015). A Multi-Step Assessment Scheme for Seismic Network Site Selection in Densely Populated Areas. Journal of Seismology 19(4), 861-879.