Continuous reservoir monitoring system based on permanent seismic source and distributed acoustic sensing

Takeshi Tsuji, Tatsunori Ikeda, Ryosuke Matsuura, Koshun Yamaoka, Tsunehisa Kimura

研究成果: ジャーナルへの寄稿会議記事査読

1 被引用数 (Scopus)

抄録

We had an experiment of a continuous monitoring system using a continuous seismic source and distributed acoustic sensing (DAS) at Kyushu Island, Japan in the fall 2019. The active seismic source system continuously generates waveforms with wide frequency range. The seismic monitoring signal is then recorded by dense and long seismic array including DAS. By stacking the continuous waveforms, our monitoring system improves signal-to-noise ratio of the seismic signal. Thus, less-energy vibration using small-size source could be utilized for the exploration of broader geological targets. Presently, we have deployed the small size monitoring source system in the geothermal field in the northeast Kyushu Island. Although our monitoring source system is small and generates high frequency vibrations (12-22Hz), the signal propagated >80 km distance using two month continuous source data. Our field experiments demonstrate that variation of seismic velocity of the crust could be identified with high accuracy (~0.01 %). To monitor the localized reservoir in higher spatial resolution, we recorded the monitoring data using DAS. Using the DAS, we succeeded to identify the temporal variation of seismic velocity. By using both continuous source and DAS, we are able to monitor reservoir in wide area with lower cost.

本文言語英語
論文番号2851
ページ(範囲)3552-3556
ページ数5
ジャーナルSEG Technical Program Expanded Abstracts
2020-October
DOI
出版ステータス出版済み - 2020
イベントSociety of Exploration Geophysicists International Exhibition and 90th Annual Meeting, SEG 2020 - Virtual, Online
継続期間: 10月 11 202010月 16 2020

!!!All Science Journal Classification (ASJC) codes

  • 地盤工学および土木地質学
  • 地球物理学

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