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Abstract

Summary

Permeability creation during hydraulic stimulation of Enhanced Geothermal System (EGS) reservoirs is accompanied in part with induced microseismicity. A satisfactory reservoir characterization is required to mitigate the seismic risk and evaluate different development scenarios with valid hazard assessment. Creating a representative three dimensional structural model in the early stages of reservoir creation is difficult because of insufficient information on the geometry of fracture network from deep boreholes data. In this analysis, we characterized the spatial patterns of induced microseismicity in the Basel geothermal system and analyzed the rupture radius distribution. We generated and analysed synthetic data to help us with the interpretation of the correlation function of spatial patterns. Assuming a constant stress drop on every seismic event, the rupture radius distribution showed a power-law distribution. The correlation function of induced patterns showed a slope of 2 indicating the existence of a fractured zone. In addition, the existence of repeating events explains the observed drop on the local slope of the corresponding correlation function.

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/content/papers/10.3997/2214-4609.201801091
2018-06-11
2024-04-20

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References

  1. Davy, Sornette, A. and Sornette, D.
    [1990] Some consequences of a proposed fractal nature of continental faulting. Nature348(6296), 56–58.
     [Google Scholar]
  2. Deichmann, Ν., Kraft, T. and Evans, K. F.
    [2014] Identification of faults activated during the stimulation of the Basel geothermal project from cluster analysis and focal mechanisms of the larger magnitude events. Geothermics52, 84–97.
     [Google Scholar]
  3. Dyer, B. C., Schanz, U., Spillmann, T., Ladner, F. and Häring, Μ. Ο.
    [2010] Application of microseismic multiplet analysis to the Basel geothermal reservoir stimulation events. Geophysical Prospecting58(5), 791–807.
     [Google Scholar]
  4. Eshelby, J. D.
    [Year] The determination of the elastic field of an ellipsoidal inclusion, and related problems. Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, 376–396.
     [Google Scholar]
  5. Evans, K. F., Moriya, H., Niitsuma, H., Jones, R. H., Phillips, W. S., Genter, Α., Sausse, J., Jung, R. and Baria, R.
    [2005] Microseismicity and permeability enhancement of hydrogeologic structures during massive fluid injections into granite at 3 km depth at the Soultz HDR site. Geophysical Journal International160(1), 388–412.
     [Google Scholar]
  6. Goertz-Allmann, B. P., Goertz, A. and Wiemer, S.
    [2011] Stress drop variations of induced earthquakes at the Basel geothermal site. Geophysical Research Letters38(9), n/a-n/a.
     [Google Scholar]
  7. Häring, Μ. Ο., Schanz, U., Ladner, F. and Dyer, B. C.
    [2008] Characterisation of the Basel 1 enhanced geothermal system. Geothermics37(5), 469–495.
     [Google Scholar]
  8. Kanamori, H. and Anderson, D. L.
    [1975] Theoretical basis of some empirical relations in seismology. Bulletin of the Seismological Society of America65(5), 1073–1095.
     [Google Scholar]
  9. Kraft, T. and Deichmann, N.
    [2014] High-precision relocation and focal mechanism of the injection-induced seismicity at the Basel EGS. Geothermics52, 59–73.
     [Google Scholar]
  10. Valley and Genter, A.
    [Year] Multi-scale fracturing in the Soultz-sous-Forêts basement from borehole image analyses. Proceedings EHDRA Scientific Conference.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801091
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Relation between Induced Microseismicity and Fracture Network in the Basel Geothermal Site
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201801091
/content/papers/10.3997/2214-4609.201801091
/content/papers/10.3997/2214-4609.201801091
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