Fracture System and Stress Field of Soultz Deep Reservoir Estimated by Multipletclustering Analysis of Induced Microseismic Events

Hirokazu Moriya, S. Miyano, H. Niitsuma, R. Baria

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Detailed fracture and stress field in deep reservoir at Soultz have been estimated based on the multiplet-clustering analysis of induced microseismic events. The multiplet-clustering analysis is one of several high-resolution mapping techniques and can estimate multiplet clusters, which consist of group of similar microseismic events. As the result of the analysis, it is suggested that the multiplet clusters show planar structures that represent seismically activated fracture planes due to increasing of pore-fluid pressure in fractures. The strikes of the multiplet structural planes are dominating N-S, even though the orientation of structural planes in the shallow reservoir were estimated to be NW-SE. The stress field has also been calculated using the orientations of multiplet structural planes and their estimated slip directions. The maximum principal stress direction is estimated to be nearly vertical.

Original languageEnglish
Pages (from-to)229-233
Number of pages5
JournalTransactions - Geothermal Resources Council
Publication statusPublished - 2002 Dec 1
EventGeothermal Resources Council: 2002 Annual Meeting - Reno, NV, United States
Duration: 2002 Sep 222002 Sep 25

Keywords

  • AE
  • Clustering
  • ECS
  • HDR
  • Microseismicity
  • Multiplet

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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