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

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:
 [1];  [1];  [1]
  1. ETH Zurich (Switzerland). Swiss Seismological Service
Publication Date:
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
Additional Journal Information:
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.
Rinaldi, Antonio P., Urpi, Luca, & Karvounis, Dimitrios. Effects of Asperity Distribution on Fluid Flow and Induced Seismicity During Deep Geothermal Exploitation. United States. doi:10.1016/j.egypro.2016.10.053.
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. doi:10.1016/j.egypro.2016.10.053. https://www.osti.gov/servlets/purl/1474901.
@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},
number = C,
volume = 97,
place = {United States},
year = {2016},
month = {11}
}

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