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Detailed Fracture System of the Soultz-sous-Forêts HDR Field Evaluated Using Microseismic Multiplet Analysis

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Abstract

 — The reservoir structure of the Soultz HDR field has been investigated by examining induced microearthquake multiplets. Microseismic events with similar waveforms have been selected from microseismic data obtained during a 1993 hydraulic fracturing experiment. Precise relative arrival times and source locations have been determined by cross-spectrum analysis. The cross-spectrum analysis decreased the residual from 0.75 ms to 0.1 ms. The estimated orientations of the multiplet planes are consistent with fracture orientations detected in Soultz boreholes. A comparison between the stress field and the orientation of structural planes suggests that the structural planes were under a critical condition of frictional slip.

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Authors and Affiliations

  1. Department of Geoscience and Technology, Graduate School of Engineering, Tohoku University, Sendai, 980-8579 Japan. E-mail: hirokazu@ni4.earth.tohoku.ac.jp, , , , , , JP

    H. Moriya, K. Nakazato & H. Niitsuma

  2. SOCOMINE, Soultz-sous-Forêts, France., , , , , , FR

    R. Baria

Authors
  1. H. Moriya
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  2. K. Nakazato
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  3. H. Niitsuma
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  4. R. Baria
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(Received May 5, 2000, revised/accepted December 22, 2000)

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Moriya, H., Nakazato, K., Niitsuma, H. et al. Detailed Fracture System of the Soultz-sous-Forêts HDR Field Evaluated Using Microseismic Multiplet Analysis. Pure appl. geophys. 159, 517–541 (2002). https://doi.org/10.1007/PL00001263

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  • DOI: https://doi.org/10.1007/PL00001263

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