Hydraulic stimulation of tight geothermal reservoirs

To extend geothermal-energy power generation from hydrothermal systems to places without anomalies in the geothermal gradient, fractures of low-permeability rock- typically at 4-6 km depth to find <150°C - should be stimulated to create enhanced geothermal systems (EGS). However, most of the atte...

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Detalhes bibliográficos
Autores: Tangirala, Sri Kalyan, Vilarrasa, Víctor, Parisio, Francesco
Formato: otro
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/337546
Acesso em linha:http://hdl.handle.net/10261/337546
https://api.elsevier.com/content/abstract/scopus_id/85173288373
Access Level:acceso abierto
Palavra-chave:Induced seismicity
Hydraulic stimulation
Geothermal reservoirs
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
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spelling Hydraulic stimulation of tight geothermal reservoirsTangirala, Sri KalyanVilarrasa, VíctorParisio, FrancescoInduced seismicityHydraulic stimulationGeothermal reservoirshttp://metadata.un.org/sdg/7Ensure access to affordable, reliable, sustainable and modern energy for allTo extend geothermal-energy power generation from hydrothermal systems to places without anomalies in the geothermal gradient, fractures of low-permeability rock- typically at 4-6 km depth to find <150°C - should be stimulated to create enhanced geothermal systems (EGS). However, most of the attempts to establish full-scale EGSs have resulted in high induced seismicity as a result of hydraulic stimulation, leading to project cancellation in some occasions. This has created a lot of insecurity in further investments in this kind of system. To achieve widespread deployment of EGSs alongside existing hydrothermal power plants, we need a thorough understanding of the effect of different hydraulic stimulation strategies on both permeability enhancement and induced seismicity. In this chapter, we compared three stimulation strategies in detail - constant rate, step rate and cyclic injection, for a range of dilatancy angles of the stimulated fracture. We find that the extent of fracture reactivation and pressure buildup depends on the injection scheme as well as the dilatancy angle. For a given dilatancy angle, we find that the cyclic-injection scheme provides the highest permeability enhancement as well as the highest slip, whereas both of them are observed to be the lowest for the step-rate injection.Peer reviewedTaylor & FrancisConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/otherhttp://purl.org/coar/resource_type/c_3248Postprintinfo:eu-repo/semantics/acceptedVersioninfo:eu-repo/semantics/bookParthttp://hdl.handle.net/10261/337546https://api.elsevier.com/content/abstract/scopus_id/85173288373reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésEnhanced Geothermal Systems (EGS): The Future Energy-Road Ahead10.1201/9781003271475-7Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3375462026-05-22T06:33:51Z
dc.title.none.fl_str_mv Hydraulic stimulation of tight geothermal reservoirs
title Hydraulic stimulation of tight geothermal reservoirs
spellingShingle Hydraulic stimulation of tight geothermal reservoirs
Tangirala, Sri Kalyan
Induced seismicity
Hydraulic stimulation
Geothermal reservoirs
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
title_short Hydraulic stimulation of tight geothermal reservoirs
title_full Hydraulic stimulation of tight geothermal reservoirs
title_fullStr Hydraulic stimulation of tight geothermal reservoirs
title_full_unstemmed Hydraulic stimulation of tight geothermal reservoirs
title_sort Hydraulic stimulation of tight geothermal reservoirs
dc.creator.none.fl_str_mv Tangirala, Sri Kalyan
Vilarrasa, Víctor
Parisio, Francesco
author Tangirala, Sri Kalyan
author_facet Tangirala, Sri Kalyan
Vilarrasa, Víctor
Parisio, Francesco
author_role author
author2 Vilarrasa, Víctor
Parisio, Francesco
author2_role author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Induced seismicity
Hydraulic stimulation
Geothermal reservoirs
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
topic Induced seismicity
Hydraulic stimulation
Geothermal reservoirs
http://metadata.un.org/sdg/7
Ensure access to affordable, reliable, sustainable and modern energy for all
description To extend geothermal-energy power generation from hydrothermal systems to places without anomalies in the geothermal gradient, fractures of low-permeability rock- typically at 4-6 km depth to find <150°C - should be stimulated to create enhanced geothermal systems (EGS). However, most of the attempts to establish full-scale EGSs have resulted in high induced seismicity as a result of hydraulic stimulation, leading to project cancellation in some occasions. This has created a lot of insecurity in further investments in this kind of system. To achieve widespread deployment of EGSs alongside existing hydrothermal power plants, we need a thorough understanding of the effect of different hydraulic stimulation strategies on both permeability enhancement and induced seismicity. In this chapter, we compared three stimulation strategies in detail - constant rate, step rate and cyclic injection, for a range of dilatancy angles of the stimulated fracture. We find that the extent of fracture reactivation and pressure buildup depends on the injection scheme as well as the dilatancy angle. For a given dilatancy angle, we find that the cyclic-injection scheme provides the highest permeability enhancement as well as the highest slip, whereas both of them are observed to be the lowest for the step-rate injection.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/other
http://purl.org/coar/resource_type/c_3248
Postprint
info:eu-repo/semantics/acceptedVersion
dc.type.openaire.fl_str_mv info:eu-repo/semantics/bookPart
format other
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/337546
https://api.elsevier.com/content/abstract/scopus_id/85173288373
url http://hdl.handle.net/10261/337546
https://api.elsevier.com/content/abstract/scopus_id/85173288373
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Enhanced Geothermal Systems (EGS): The Future Energy-Road Ahead
10.1201/9781003271475-7
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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