Effects of asperity distribution on fluid flow and induced seismicity during deep geothermal exploitation
Open access
Date
2016-11Type
- Conference Paper
ETH Bibliography
yes
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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. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000126715Publication status
publishedExternal links
Book title
European Geosciences Union General Assembly 2016, EGU Division Energy, Resources & the Environment (ERE)Journal / series
Energy ProcediaVolume
Pages / Article No.
Publisher
ElsevierEvent
Subject
Induced seismicity; Permeability changes; Asperities; Deep geothermal systemOrganisational unit
02818 - Schweiz. Erdbebendienst (SED) / Swiss Seismological Service (SED)
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ETH Bibliography
yes
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