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Microseismic Monitoring of Geothermal Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H: Geo-Energy".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 2430

Special Issue Editor


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Guest Editor
Geothermal Team, Renewable Energy Research Centyer, Fukushima Renewable Energy Institute (FREA), National Institute of Advanced Industrial Science and Technology (AIST), Koriyama, Fukushima, Japan
Interests: Microseismic monitoring; enhanced geothermal systems; induced seismicity; signal processing

Special Issue Information

Dear Colleagues, 

Microseismic monitoring is one of the most practical and effective means to collect both wide and 3D information of dynamic behaviour of geothermal reservoirs associated with various kinds of operation, including production, injection, and build-up. Microseismic monitoring of geothermal reservoirs has a long history, and activities, spatio-temporal distribution of hypocenters, and magnitude have been mainly used for estimation of location and motion of fracture system, in which geothermal energy is stored. Recent progress in hardware and processing techniques in seismology enables us to acquire more reliable and detailed information of the reservoirs. Furthermore, induced seismicity with large magnitude in creation and production of/from enhanced geothermal systems (EGS) is considered one of the largest environmental burden in utilization of geothermal energy. Scientific understanding of physics behind the large induced earthquake has been deepened after some unexpected and unfortunate experiences in EGS development worldwide. 

The Special Issue of Energies on microseismic monitoring covers a wide area of science and technologies related to microseismicity in the geothermal field. I believe that sharing experiences and knowledge through this SI will greatly contribute to better microseismic monitoring for stable and sustainable green geothermal energies and reduction of the risks of damaging earthquakes in the future. 

Dr. Hiroshi Asanuma
Guest Editor

Manuscript Submission Information

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Keywords

  • Characteristics of microseismicity from geothermal systems
  • Estimation of distribution of flow and pressure
  • Induced seismicity
  • Enhanced Geothermal Systems (EGS)
  • Downhole seismic monitoring system

Published Papers (1 paper)

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Research

11 pages, 4930 KiB  
Article
Identification of Similar Seismic Waves Using the Phase-Only Correlation Function and Wavelet Transform
by Hirokazu Moriya
Energies 2021, 14(15), 4527; https://doi.org/10.3390/en14154527 - 27 Jul 2021
Cited by 3 | Viewed by 1402
Abstract
Accurately determined acoustic emission (AE) locations provide significant information on fracture systems, such as the orientation of fractures in a geothermal reservoir. To determine the relative source locations among a group of seismic events, similar AE waveforms must be detected and the relative [...] Read more.
Accurately determined acoustic emission (AE) locations provide significant information on fracture systems, such as the orientation of fractures in a geothermal reservoir. To determine the relative source locations among a group of seismic events, similar AE waveforms must be detected and the relative arrival times of the P and S waves must be determined. In this paper, a method to identify similar AE waveforms is proposed, in which wavelet transform scalograms are used to determine the phase-only correlation function. The proposed method was applied to arbitrarily selected seismic waveforms, and its feasibility was evaluated by comparing the results with those obtained when the phase-only correlation function was obtained by using Fourier transform results. Full article
(This article belongs to the Special Issue Microseismic Monitoring of Geothermal Systems)
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