1887

Abstract

Summary

In the framework of the ECOGI geothermal project in Alsace, eastern France ( ), an integrated geological, fluid flow, and geomechanical model of the Rittershoffen site was built ( ). This paper completes that study by improving the coupled geomechanical simulation, notably by reviewing the previous discrete fracture network model and incorporating it in the simulation, and demonstrates a workflow to predict the fault reactivation and microseismic event generation induced by geothermal operations. This prediction, based on finite-element simulations of the stress and plastic deformations linked to the changes in pressure and temperature, is matched with the observed microseismic events ( ) to validate the mechanical model.

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/content/papers/10.3997/2214-4609.201702127
2017-09-03
2024-03-29
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References

  1. Baujard, C., Genter, A., Dalmais, E., Maurer, V., Hehn, R., Rosillette, R., Vidal, J. and Schmittbuhl, J.
    [2017], Hydrothermal characterization of wells GRT-1 and GRT-2 in Rittershoffen, France: Implications on the understanding of natural flow systems in the Rhine Graben. Geothermics, 65, 255–268.
    [Google Scholar]
  2. Cornet, F.H., Bérard, Th., Bourouis, S.
    [2007] How close to failure is a granite rock mass at a 5km depth?International Journal of Rock Mechanics & Mining Sciences, 44, 47–66.
    [Google Scholar]
  3. Genter, A., Vidal, J., Baujard, C., Dalmais, E. and Schmittbuhl, J.
    [2015] Permeability in deep-seated granitic rocks: lessons learnt from deep geothermal boreholes in the Upper Rhine Graben, 20th International Association of Hydrogeologists (9–10 June 2015, La Roche-sur-Yon, France).
    [Google Scholar]
  4. Hanks, T.C. and Kanamori, H.
    [1979] A moment magnitude scale. Journal of Geophysical Research84, 2348–2350.
    [Google Scholar]
  5. Lengline, O., Boubacar, M. and Schmittbuhl, J.
    [2017] Seismicity related to the hydraulic stimulation of GRT1, Rittershoffen, France. Geophysical Journal International208(3), 1704–1715.
    [Google Scholar]
  6. Sosio, G., Boivineau, A., Burachok, O., Ould Braham, R., Zordan, E., Mandiuc, A., Spyrou, Ch., Belouahchia, M., Baujard, C., Dalmais, E. and Genter, A.
    [2016] Integrated Geological, Fluid Flow and Geomechanical Model of a Geothermal Field. European Geothermal Conference 2016 (19–22 September 2016, Strasbourg, France), T-EP-280.
    [Google Scholar]
  7. Valley, B.
    [2007] The relation between natural fracturing and stress heterogeneities in deep-seated crystalline rocks at Soultz-sous-Forêts (France), PhD thesis, ETH Zurich, Switzerland, 260 pp.
    [Google Scholar]
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