The risks of long-term re-injection in supercritical geothermal systems
Supercritical geothermal systems are appealing sources of sustainable and carbon-free energy located in volcanic areas. Recent successes in drilling and exploration have opened new possibilities and spiked interest in this technology. Experimental and numerical studies have also confirmed the feasibility of creating fluid conducting fractures in sedimentary and crystalline rocks at high temperature, paving the road towards Enhanced Supercritical Geothermal Systems. Despite their attractiveness, several important questions regarding safe exploitation remain open. We dedicate this manuscript to the first thermo-hydro-mechanical numerical study of a doublet geothermal system in supercritical conditions. Here we show that thermally-induced stress and strain effects dominate the geomechanical response of supercritical systems compared to pore pressure-related instabilities, and greatly enhance seismicity during cold water re-injection. This finding has important consequences in the design of Supercritical Geothermal Systems.
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Springer Nature
2019-09-26
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Subjects: | Supercritical Geothermal Systems, Re-injection, |
Online Access: | http://hdl.handle.net/10261/191821 http://dx.doi.org/10.13039/501100000781 |
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dig-idaea-es-10261-1918212020-05-25T16:39:24Z The risks of long-term re-injection in supercritical geothermal systems Parisio, Francesco Vilarrasa, Víctor Wang, Wenqing Kolditz, Olaf Nagel, Thomas European Research Council Vilarrasa, Víctor [0000-0003-1169-4469] Supercritical Geothermal Systems Re-injection Supercritical geothermal systems are appealing sources of sustainable and carbon-free energy located in volcanic areas. Recent successes in drilling and exploration have opened new possibilities and spiked interest in this technology. Experimental and numerical studies have also confirmed the feasibility of creating fluid conducting fractures in sedimentary and crystalline rocks at high temperature, paving the road towards Enhanced Supercritical Geothermal Systems. Despite their attractiveness, several important questions regarding safe exploitation remain open. We dedicate this manuscript to the first thermo-hydro-mechanical numerical study of a doublet geothermal system in supercritical conditions. Here we show that thermally-induced stress and strain effects dominate the geomechanical response of supercritical systems compared to pore pressure-related instabilities, and greatly enhance seismicity during cold water re-injection. This finding has important consequences in the design of Supercritical Geothermal Systems. The contribution of F.P. is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - project number PA 3451/1-1 and by the GEMex project, which is supported by the European Union’s Horizon 2020 programme for Research and Innovation under grant agreement No 727550. V.V. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme through the Starting Grant GEoREST, grant agreement No. 801809 (http://www.georest.eu). The contribution of W.W. is funded by the Advanced Earth System Modelling Capacity (ESM) project by the Helmholtz Association. Peer reviewed 2019-09-30T06:13:40Z 2019-09-30T06:13:40Z 2019-09-26 artículo http://purl.org/coar/resource_type/c_6501 Nature Communicationsvolume 10: 4391 (2019) 10.1038/s41467-019-12146-0 http://hdl.handle.net/10261/191821 http://dx.doi.org/10.13039/501100000781 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/727550 Postprint https://doi.org/10.1038/s41467-019-12146-0 Sí open Springer Nature |
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Supercritical Geothermal Systems Re-injection Supercritical Geothermal Systems Re-injection Parisio, Francesco Vilarrasa, Víctor Wang, Wenqing Kolditz, Olaf Nagel, Thomas The risks of long-term re-injection in supercritical geothermal systems |
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Supercritical geothermal systems are appealing sources of sustainable and carbon-free energy located in volcanic areas. Recent successes in drilling and exploration have opened new possibilities and spiked interest in this technology. Experimental and numerical studies have also confirmed the feasibility of creating fluid conducting fractures in sedimentary and crystalline rocks at high temperature, paving the road towards Enhanced Supercritical Geothermal Systems. Despite their attractiveness, several important questions regarding safe exploitation remain open. We dedicate this manuscript to the first thermo-hydro-mechanical numerical study of a doublet geothermal system in supercritical conditions. Here we show that thermally-induced stress and strain effects dominate the geomechanical response of supercritical systems compared to pore pressure-related instabilities, and greatly enhance seismicity during cold water re-injection. This finding has important consequences in the design of Supercritical Geothermal Systems. |
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European Research Council |
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European Research Council Parisio, Francesco Vilarrasa, Víctor Wang, Wenqing Kolditz, Olaf Nagel, Thomas |
format |
artículo |
topic_facet |
Supercritical Geothermal Systems Re-injection |
author |
Parisio, Francesco Vilarrasa, Víctor Wang, Wenqing Kolditz, Olaf Nagel, Thomas |
author_sort |
Parisio, Francesco |
title |
The risks of long-term re-injection in supercritical geothermal systems |
title_short |
The risks of long-term re-injection in supercritical geothermal systems |
title_full |
The risks of long-term re-injection in supercritical geothermal systems |
title_fullStr |
The risks of long-term re-injection in supercritical geothermal systems |
title_full_unstemmed |
The risks of long-term re-injection in supercritical geothermal systems |
title_sort |
risks of long-term re-injection in supercritical geothermal systems |
publisher |
Springer Nature |
publishDate |
2019-09-26 |
url |
http://hdl.handle.net/10261/191821 http://dx.doi.org/10.13039/501100000781 |
work_keys_str_mv |
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