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

descriptionPublicationkeyboard_double_arrow_right Article , Conference object , Journal 01 Nov 2016Embargo end date: 01 Jan 2016 Switzerland, United States Publisher:Elsevier BVJournal:Energy Procedia, volume 97, pages 470-477 (issn: 1876-6102,

Authors: Rinaldi, Antonio P; Urpi, Luca; Karvounis, Dimitrios;

doi: 10.1016/j.egypro.2016.10.053 , 10.3929/ethz-b-000126715

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. We also investigated such effects by varying the density of asperities.

European Geosciences Union General Assembly 2016, EGU Division Energy, Resources & the Environment (ERE)

Energy Procedia, 97

ISSN:1876-6102

Countries

Switzerland, United States

Related Organizations

University of California System
United States
ETH Zurich
Switzerland
École Polytechnique Fédérale de Lausanne EPFL
Switzerland

Keywords

Induced seismicity, Deep geothermal system, Induced seismicity; Permeability changes; Asperities; Deep geothermal system, asperities, Geology, Chemical Engineering, deep geothermal system, permeability changes, Geophysics, Energy(all), Asperities, Earth Sciences, Permeability changes, Electrical and Electronic Engineering, induced seismicity

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