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dc.contributor.authorWu, Haiqing
dc.contributor.authorVilarrasa Riaño, Víctor
dc.contributor.authorDe Simone, Silvia
dc.contributor.authorSaaltink, Maarten Willem
dc.contributor.authorParisio, Francesco
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Enginyeria Civil
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.identifier.citationWu, H. [et al.]. Analytical solution to assess the induced seismicity potential of faults in pressurized and depleted reservoirs. "Journal of geophysical research B: solid earth", 2021, vol. 126, núm. 1, p. e2020JB020436:1-e2020JB020436:31.
dc.description.abstractDisplaced faults crossing the reservoir could significantly increase the induced earthquake frequency in geo-energy projects. Understanding and predicting the stress variation in such cases is essential to minimize the risk of induced seismicity. Here, we adopt the inclusion theory to develop an analytical solution for the stress response to pore pressure variations within the reservoir for both permeable and impermeable faults with offset ranging from zero to the reservoir thickness. By analyzing fault stability changes due to reservoir pressurization/depletion under different scenarios, we find that (1) the induced seismicity potential of impermeable faults is always larger than that of permeable faults under any initial and injection conditions—the maximum size of the fault undergoing failure is 3–5 times larger for impermeable than for permeable faults; (2) stress concentration at the corners results in the occurrence of reversed slip in normal faults with a normal faulting stress regime; (3) while fault offset has no impact on the slip potential for impermeable faults, the slip potential increases with the offset for permeable faults, which indicates that non-displaced permeable faults constitute a safer choice for site selection; (4) an impermeable fault would rupture at a lower deviatoric stress, and at a smaller pressure buildup than a permeable one; and (5) the induced seismicity potential is overestimated and the injectivity underestimated if the stress arching (i.e., the poromechanical coupling) is neglected. This analytical solution is a useful tool for site selection and for supporting decision making during the lifetime of geo-energy projects.
dc.description.sponsorshipH. Wu acknowledges the financial support received from the AGAUR (Generalitat de Catalunya) through the ‘‘grant for universities and research centers for the recruitment of new research personnel (FI-2019)”. V. Vilarrasa 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. V. Vilarrasa also acknowledges support by the Spanish Ministry of Science and Innovation (Project CEX2018- 000794-S). S.D. Simone acknowledges financial support from the SAD2018 project funded by the Brittany Region and from ANR LabCom Project eLabo ANR-17-LCV2-0012. M. Saaltink acknowledges financial support from the “HEATSTORE” project (170153–44011), which has been subsidized through the ERANET Cofund GEOTHERMICA (Grant agreement no. 731117), from the European Commission and the Spanish Ministry of Science, Innovation and Universities (PCI2018-092933). F. Parisio acknowledges funding from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)— project number PA 3451/1-1. The authors thank Tomas Aquino for his advice on the integral solutions.
dc.rightsAttribution 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Energies::Energia geotèrmica
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
dc.subject.lcshHeat storage
dc.subject.otherReservoir pressurization/depletion
dc.subject.otherFault stability
dc.subject.otherInclusion theory
dc.subject.otherInduced earthquakes
dc.subject.otherPermeable and impermeable faults
dc.titleAnalytical solution to assess the induced seismicity potential of faults in pressurized and depleted reservoirs
dc.subject.lemacCalor -- Emmagatzematge
dc.contributor.groupUniversitat Politècnica de Catalunya. GHS - Grup d'Hidrologia Subterrània
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorWu, H.; Vilarrasa, V.; De Simone, S.; Saaltink, M.; Parisio, F.
local.citation.publicationNameJournal of geophysical research B: solid earth

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Attribution 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution 3.0 Spain