Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation

Rinaldi, Antonio P.; Urpi, Luca; Karvounis, Dimitrios

doi:10.1016/j.egypro.2016.10.053

Title: Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation

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Abstract

This work investigates the injection-induced seismic response of a heterogeneous fault plane, featuring low-permeability asperities embedded into a high-permeability damage zone. We simulate the pressure evolution with a hydrogeological simulator, accounting for the heterogeneous fault plane. Seismicity occurs then on the asperities, represented as unstable patches reactivating by means of the Mohr-Coulomb criterion. The hydrological and seismic modules are implicitly coupled to account for effects of asperity reactivation on the permeability. Results show that permeability changes may cause at a later time a change in seismicity propagation. Finally, we also investigated such effects by varying the density of asperities.

Authors:

Rinaldi, Antonio P. ^[1]; Urpi, Luca ^[1]; Karvounis, Dimitrios ^[1]

ETH Zurich (Switzerland). Swiss Seismological Service

Publication Date:: Tue Nov 29 00:00:00 EST 2016

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); Swiss National Science Foundation (SNSF)

OSTI Identifier:: 1474901

Grant/Contract Number:: AC02-05CH11231; PZENP2 160555

Resource Type:: Accepted Manuscript

Journal Name:: Energy Procedia (Online)

Additional Journal Information:: Journal Name: Energy Procedia (Online); Journal Volume: 97; Journal Issue: C; Related Information: © 2016 The Authors.; Journal ID: ISSN 1876-6102

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES; induced seismicity; permeability changes; asperities; deep geothermal system

Citation Formats


                    Rinaldi, Antonio P., Urpi, Luca, and Karvounis, Dimitrios. Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation.  United States: N. p., 2016. 
Web.  doi:10.1016/j.egypro.2016.10.053.

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                    Rinaldi, Antonio P., Urpi, Luca, & Karvounis, Dimitrios. Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation.  United States.  https://doi.org/10.1016/j.egypro.2016.10.053

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                    Rinaldi, Antonio P., Urpi, Luca, and Karvounis, Dimitrios. Tue .  
"Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation".  United States.  https://doi.org/10.1016/j.egypro.2016.10.053.  https://www.osti.gov/servlets/purl/1474901.

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@article{osti_1474901,

  title        = {Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation},

  author       = {Rinaldi, Antonio P. and Urpi, Luca and Karvounis, Dimitrios},

  abstractNote = {This work investigates the injection-induced seismic response of a heterogeneous fault plane, featuring low-permeability asperities embedded into a high-permeability damage zone. We simulate the pressure evolution with a hydrogeological simulator, accounting for the heterogeneous fault plane. Seismicity occurs then on the asperities, represented as unstable patches reactivating by means of the Mohr-Coulomb criterion. The hydrological and seismic modules are implicitly coupled to account for effects of asperity reactivation on the permeability. Results show that permeability changes may cause at a later time a change in seismicity propagation. Finally, we also investigated such effects by varying the density of asperities.},

  doi          = {10.1016/j.egypro.2016.10.053},

  journal      = {Energy Procedia (Online)},

  number       = C,

  volume       = 97,

  place        = {United States},

  year         = {Tue Nov 29 00:00:00 EST 2016},

  month        = {Tue Nov 29 00:00:00 EST 2016}

}

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