Detailed fracture system of the Soultz-sous-Forêts HDR field evaluated using microseismic multiplet analysis

Hirokazo Moriya, Katsuhisa Nakazato, Hiroaki Niitsuma, R. Baria

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)517-541
Number of pages25
JournalPure and Applied Geophysics
Volume159
Issue number1-3
DOIs
Publication statusPublished - 2002 Jan 1

Keywords

  • HDR
  • Induced seismicity
  • Microearthquakes
  • Multiplet

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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