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

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

doi:10.1007/PL00001263

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

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

ENG - Graduate School of Engineering (Common)

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	517-541
Number of pages	25
Journal	Pure and Applied Geophysics
Volume	159
Issue number	1-3
DOIs	https://doi.org/10.1007/PL00001263
Publication status	Published - 2002 Jan 1

Keywords

HDR
Induced seismicity
Microearthquakes
Multiplet

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Access to Document

10.1007/PL00001263

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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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AU - Niitsuma, Hiroaki

AU - Baria, R.

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N2 - 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.

AB - 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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