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Communication dans un congrès

Dynamics of Fluid Induced Aseismic Slip

Abstract : Fluid operations at depth not only trigger earthquakes but also aseismic slip on preexisting faults. In many cases the aseismic slip activates in turn a significant amount of seismicity. Understanding the dynamics of such propagating slow slip phenomena is thus of primarily importance to better assess the induced seismicity hazard. Here we model a typical aseismic fault by a planar interface between elastic half spaces, where slip is resisted by Dieterich-Ruina friction. We present numerical results about the slow slip events generated by a local fluid injection on such a fault. We demonstrate the existence of a self similar solution for slip rate along this fault of the form $V=t^{−1}f(x/t)$. This solution allows to identify the mechanical parameters controlling the evolution of slow slip in response to a localized pressure increase.
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Contributeur : Pierre Dublanchet <>
Soumis le : vendredi 23 juin 2017 - 09:32:04
Dernière modification le : jeudi 24 septembre 2020 - 16:34:21



Pierre Dublanchet, Robert C. Viesca. Dynamics of Fluid Induced Aseismic Slip. EAGE conference, European Association of Geoscientists & Engineers, Jun 2017, Paris, France. pp.1-5, ⟨10.3997/2214-4609.201700960⟩. ⟨hal-01545714⟩



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