Effects of asperity distribution on fluid flow and induced seismicity during deep geothermal exploitation
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Author / Producer
Date
2016-11
Publication Type
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.
Permanent link
Publication status
published
External links
Book title
European Geosciences Union General Assembly 2016, EGU Division Energy, Resources & the Environment (ERE)
Journal / series
Volume
97
Pages / Article No.
470 - 477
Publisher
Elsevier
Event
EGU General Assembly 2016
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Induced seismicity; Permeability changes; Asperities; Deep geothermal system
Organisational unit
02818 - Schweiz. Erdbebendienst (SED) / Swiss Seismological Service (SED)