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dc.contributor.author
Jiang, Chuanyin
dc.contributor.author
Wang, Xiaoguang
dc.contributor.author
Zhang, Fengshou
dc.contributor.author
Deng, Kai
dc.contributor.author
Lei, Qinghua
dc.date.accessioned
2022-07-18T13:44:37Z
dc.date.available
2022-06-15T07:55:36Z
dc.date.available
2022-06-15T08:17:00Z
dc.date.available
2022-07-18T13:44:37Z
dc.date.issued
2022-08
dc.identifier.issn
1434-453X
dc.identifier.issn
0723-2632
dc.identifier.other
10.1007/s00603-022-02882-z
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/552399
dc.description.abstract
We study fracture activation and induced seismicity during the long-term heat production of fractured geothermal reservoirs. The fracture system is modeled by the discrete fracture network approach that realistically represents the distribution and behavior of natural fractures in the system. Using a novel fully coupled thermal-hydro-mechanical model, we systematically investigate the interplay among in situ stresses, injection pressure and temperature on the spatio-temporal evolution of heat production-induced seismicity. Our results show that in situ stress state exerts a fundamental background control on the seismicity occurrence, while injection-induced fluid pressurization and thermal perturbation act as two competing triggering factors. Induced seismic events occur mainly in the near field of the injection well and along the main streamlines of fluid flow through the reservoir. Under a low differential stress condition, fracture activation is dominated by late-stage thermal drawdown, such that the injection temperature controls the timing, magnitude and number of seismic events. However, under a high differential stress condition, the effect of early-stage pressurization dominates with critically stressed fractures activated once or twice. The fracture activation is sensitive to the variation of pressure gradient, whilst the injection temperature attempts to influence the magnitude but in general not the timing and number of thermal drawdown-induced secondary seismic events. Furthermore, these anthropogenic parameters (i.e. injection pressure and temperature) strongly affect the long-term thermal energy output of the reservoir. Our research findings have important implications for the mitigation of seismic hazards by optimizing production strategy design during heat extraction from deep geothermal reservoirs.
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.subject
Fracture network
en_US
dc.subject
Induced seismicity
en_US
dc.subject
Heat production
en_US
dc.subject
Thermal-hydro-mechanical coupling
en_US
dc.title
Fracture Activation and Induced Seismicity During Long-Term Heat Production in Fractured Geothermal Reservoirs
en_US
dc.type
Journal Article
dc.date.published
2022-06-14
ethz.journal.title
Rock Mechanics and Rock Engineering
ethz.journal.volume
55
en_US
ethz.journal.issue
8
en_US
ethz.journal.abbreviated
Rock Mech Rock Eng
ethz.pages.start
5235
en_US
ethz.pages.end
5258
en_US
ethz.grant
Future evolution of meta-stable rock slopes in hydropower systems of China: Implications for long-term safety
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Wien
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03465 - Löw, Simon (emeritus) / Löw, Simon (emeritus)
en_US
ethz.grant.agreementno
189882
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Sino-Swiss Science and Technology Cooperation (SSSTC)
ethz.date.deposited
2022-06-15T07:55:43Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2022-07-18T13:44:46Z
ethz.rosetta.lastUpdated
2022-07-18T13:44:46Z
ethz.rosetta.versionExported
true
ethz.COinS
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