Spatial distribution of coherent microseismic events at Cooper Basin, Australia

Yusuke Kumano, Hirokazu Moriya, Hiroshi Asanuma, Doone Wyborn, Hiroaki Niitsuma

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In previous work (Kumano et al., 2003, Asanuma et al., 2004), we analyzed the AE data set obtained at Cooper Basin Hot Fractured Rock (HFR) geothermal field, Australia, during hydraulic stimulation conducted in the last quarter of 2003. Source locations of microseismic events were determined using a standard earthquake location procedure, SED. Location uncertainties were found to be as great as the thickness of the seismic cloud, however, thus preventing us from making meaningful interpretations regarding details of the fracture system within reservoir. We applied microseismic multiplet analysis to improve relative source location accuracy. This method can illuminate the detailed fracture system and physical phenomena associated with microseismicity by characterizing the waveform similarity of microseismic events. We then relocated the events using a Double-Differential source location technique, and imaged the reservoir structure using the spatial distribution of coherent microseismic events. The adjusted source distribution suggests that the reservoir fracture system consists of sub-parallel planar structures, and the spatial distribution of coherent microseismic events indicates that these sub-parallel structures each comprise a simple fracture system that is independent from the others.

Original languageEnglish
Title of host publicationSociety of Exploration Geophysicists - SEG International Exposition and 76tth Annual Meeting 2006, SEG 2006
PublisherSociety of Exploration Geophysicists
Pages595-599
Number of pages5
ISBN (Print)9781604236972
Publication statusPublished - 2018 Jan 1
EventSociety of Exploration Geophysicists International Exposition and 76tth Annual Meeting 2006, SEG 2006 - New Orleans, United States
Duration: 2006 Oct 12006 Oct 6

Publication series

NameSociety of Exploration Geophysicists - SEG International Exposition and 76tth Annual Meeting 2006, SEG 2006

Other

OtherSociety of Exploration Geophysicists International Exposition and 76tth Annual Meeting 2006, SEG 2006
CountryUnited States
CityNew Orleans
Period06/10/106/10/6

ASJC Scopus subject areas

  • Geophysics

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    Kumano, Y., Moriya, H., Asanuma, H., Wyborn, D., & Niitsuma, H. (2018). Spatial distribution of coherent microseismic events at Cooper Basin, Australia. In Society of Exploration Geophysicists - SEG International Exposition and 76tth Annual Meeting 2006, SEG 2006 (pp. 595-599). (Society of Exploration Geophysicists - SEG International Exposition and 76tth Annual Meeting 2006, SEG 2006). Society of Exploration Geophysicists.