Geothermal energy in supercritical reservoirs
Geothermal energy production can be maximized by reaching depths in volcanic areas at which water stays in supercritical conditions. A single well in supercritical conditions of water can produce 50 MWe, which is ten times the production of a conventional geothermal well. Thus, the transition to a c...
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ftcsic:oai:digital.csic.es:10261/224375 2024-02-11T10:05:09+01:00 Geothermal energy in supercritical reservoirs Vilarrasa, Víctor Vilarrasa, Víctor 2020-10-22 http://hdl.handle.net/10261/224375 en eng Sí Seminar of the Global Change Research Group, Mediterranean Institute for Advanced Studies (IMEDEA-CSIC), Esporles, Spain, 22 October 2020 http://hdl.handle.net/10261/224375 open Geothermal energy Supercritical reservoirs comunicación de congreso http://purl.org/coar/resource_type/c_5794 2020 ftcsic 2024-01-16T11:00:10Z Geothermal energy production can be maximized by reaching depths in volcanic areas at which water stays in supercritical conditions. A single well in supercritical conditions of water can produce 50 MWe, which is ten times the production of a conventional geothermal well. Thus, the transition to a carbon-free energy market can be speeded up by exploiting supercritical reservoirs to produce geothermal energy. However, this technology is not exempt of risks, like induced seismicity. We simulate a doublet reproducing the conditions found at the bottom hole of the IDDP-2 project in Iceland. We find that, contrary to most fluid injection projects, seismicity will be mainly induced by cooling rather than by pore pressure buildup. The cooled region around the re-injection well progressively increases, causing cooling-induced stress changes that affect fault stability in the long term. We find that the rate of induced seismicity at the fault increases four orders of magnitude after 7 to 10 years of water circulation. This result suggests that the lifetime of supercritical geothermal projects may be eventually limited by cooling-induced earthquakes. Overall, properly managed volcanic areas have a huge potential to provide low-carbon electricity. Peer reviewed Conference Object Iceland Digital.CSIC (Spanish National Research Council) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Geothermal energy Supercritical reservoirs |
spellingShingle |
Geothermal energy Supercritical reservoirs Vilarrasa, Víctor Geothermal energy in supercritical reservoirs |
topic_facet |
Geothermal energy Supercritical reservoirs |
description |
Geothermal energy production can be maximized by reaching depths in volcanic areas at which water stays in supercritical conditions. A single well in supercritical conditions of water can produce 50 MWe, which is ten times the production of a conventional geothermal well. Thus, the transition to a carbon-free energy market can be speeded up by exploiting supercritical reservoirs to produce geothermal energy. However, this technology is not exempt of risks, like induced seismicity. We simulate a doublet reproducing the conditions found at the bottom hole of the IDDP-2 project in Iceland. We find that, contrary to most fluid injection projects, seismicity will be mainly induced by cooling rather than by pore pressure buildup. The cooled region around the re-injection well progressively increases, causing cooling-induced stress changes that affect fault stability in the long term. We find that the rate of induced seismicity at the fault increases four orders of magnitude after 7 to 10 years of water circulation. This result suggests that the lifetime of supercritical geothermal projects may be eventually limited by cooling-induced earthquakes. Overall, properly managed volcanic areas have a huge potential to provide low-carbon electricity. Peer reviewed |
author2 |
Vilarrasa, Víctor |
format |
Conference Object |
author |
Vilarrasa, Víctor |
author_facet |
Vilarrasa, Víctor |
author_sort |
Vilarrasa, Víctor |
title |
Geothermal energy in supercritical reservoirs |
title_short |
Geothermal energy in supercritical reservoirs |
title_full |
Geothermal energy in supercritical reservoirs |
title_fullStr |
Geothermal energy in supercritical reservoirs |
title_full_unstemmed |
Geothermal energy in supercritical reservoirs |
title_sort |
geothermal energy in supercritical reservoirs |
publishDate |
2020 |
url |
http://hdl.handle.net/10261/224375 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
Sí Seminar of the Global Change Research Group, Mediterranean Institute for Advanced Studies (IMEDEA-CSIC), Esporles, Spain, 22 October 2020 http://hdl.handle.net/10261/224375 |
op_rights |
open |
_version_ |
1790602043617968128 |