抄録
To detect CO2 leakage from CO2 geological storage, we describe a seismic monitoring method using a continuous and controlled seismic source system, the Accurately Controlled Routinely Operated Signal System (ACROSS). The method applies surface-wave analysis to monitor the shallow subsurface from the temporal-variation (time-variation) of surface-wave phase velocity. Our numerical simulation study for CO2 leakage through fault zones indicated that the spatial distribution of leaked CO2 can be estimated from small temporal-variation of local phase velocities (~1-3%). To demonstrate the method in a field case, we analyzed continuous seismic records acquired with ACROSS. We clearly extracted a dispersion curve of surface waves in the frequency range excited by the ACROSS (5.015-15.015 Hz). In particular, we obtained reliable estimates of phase velocities in 10-15Hz frequency range, in which the time-variation of phase velocities was better than 1% accuracy. This temporal stability was sufficient to allow us to detect changes in phase velocities associated with CO2 leakage before leaked CO2 reached the surface.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 94-105 |
| ページ数 | 12 |
| ジャーナル | International Journal of Greenhouse Gas Control |
| 巻 | 45 |
| DOI | |
| 出版物ステータス | 出版済み - 2 1 2016 |
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All Science Journal Classification (ASJC) codes
- Pollution
- Energy(all)
- Industrial and Manufacturing Engineering
- Management, Monitoring, Policy and Law
これを引用
Development of surface-wave monitoring system for leaked CO2 using a continuous and controlled seismic source. / Ikeda, Tatsunori; Tsuji, Takeshi; Watanabe, Toshiki; Yamaoka, Koshun.
：: International Journal of Greenhouse Gas Control, 巻 45, 01.02.2016, p. 94-105.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Development of surface-wave monitoring system for leaked CO2 using a continuous and controlled seismic source
AU - Ikeda, Tatsunori
AU - Tsuji, Takeshi
AU - Watanabe, Toshiki
AU - Yamaoka, Koshun
PY - 2016/2/1
Y1 - 2016/2/1
N2 - To detect CO2 leakage from CO2 geological storage, we describe a seismic monitoring method using a continuous and controlled seismic source system, the Accurately Controlled Routinely Operated Signal System (ACROSS). The method applies surface-wave analysis to monitor the shallow subsurface from the temporal-variation (time-variation) of surface-wave phase velocity. Our numerical simulation study for CO2 leakage through fault zones indicated that the spatial distribution of leaked CO2 can be estimated from small temporal-variation of local phase velocities (~1-3%). To demonstrate the method in a field case, we analyzed continuous seismic records acquired with ACROSS. We clearly extracted a dispersion curve of surface waves in the frequency range excited by the ACROSS (5.015-15.015 Hz). In particular, we obtained reliable estimates of phase velocities in 10-15Hz frequency range, in which the time-variation of phase velocities was better than 1% accuracy. This temporal stability was sufficient to allow us to detect changes in phase velocities associated with CO2 leakage before leaked CO2 reached the surface.
AB - To detect CO2 leakage from CO2 geological storage, we describe a seismic monitoring method using a continuous and controlled seismic source system, the Accurately Controlled Routinely Operated Signal System (ACROSS). The method applies surface-wave analysis to monitor the shallow subsurface from the temporal-variation (time-variation) of surface-wave phase velocity. Our numerical simulation study for CO2 leakage through fault zones indicated that the spatial distribution of leaked CO2 can be estimated from small temporal-variation of local phase velocities (~1-3%). To demonstrate the method in a field case, we analyzed continuous seismic records acquired with ACROSS. We clearly extracted a dispersion curve of surface waves in the frequency range excited by the ACROSS (5.015-15.015 Hz). In particular, we obtained reliable estimates of phase velocities in 10-15Hz frequency range, in which the time-variation of phase velocities was better than 1% accuracy. This temporal stability was sufficient to allow us to detect changes in phase velocities associated with CO2 leakage before leaked CO2 reached the surface.
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U2 - 10.1016/j.ijggc.2015.11.030
DO - 10.1016/j.ijggc.2015.11.030
M3 - Article
AN - SCOPUS:84951299683
VL - 45
SP - 94
EP - 105
JO - International Journal of Greenhouse Gas Control
JF - International Journal of Greenhouse Gas Control
SN - 1750-5836
ER -