Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source

Tatsunori Ikeda, Takeshi Tsuji, Mamoru Takanashi, Isao Kurosawa, Masashi Nakatsukasa, Donald White, Kyle Worth, Brian Roberts

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

Abstract


We performed time-lapse surface-wave analysis to monitor the shallow subsurface at the Aquistore CO2 storage site, managed by the Petroleum Technology Research Centre, Canada. A continuous and controlled seismic source system called the Accurately Controlled Routinely Operated Signal System (ACROSS) is used to enhance the temporal resolution and source repeatability in the monitoring. We extracted hourly-variation of surface-wave phase velocities from continuous seismic data with 4 hour stacking. As a result, we could monitor phase velocities within 1 % accuracy during 1-9 days in the frequency range of 4.5-6 Hz. We identified 2-5 % seasonal variation of phase velocities. The high phase velocities observed in winter can be explained by the degree of freezing of partially saturated rock. Our time-lapse results contributed to improving the accuracy of monitoring deep reflections from the CO2 injection reservoir by correcting seasonal variations of near-surface velocity. The high temporal resolution and accuracy of our monitoring results have the potential to identify sudden changes such as CO2 leakage from CO2 storage sites.
Original languageEnglish
Title of host publicationSEG Technical Program Expanded Abstracts 2016
Pages5479-5484
Publication statusPublished - Sep 1 2016

Fingerprint

seismic source
phase velocity
surface wave
monitoring
seasonal variation
stacking
leakage
freezing
wave velocity
seismic data
petroleum
analysis
winter
rock

Cite this

Ikeda, T., Tsuji, T., Takanashi, M., Kurosawa, I., Nakatsukasa, M., White, D., ... Roberts, B. (2016). Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source. In SEG Technical Program Expanded Abstracts 2016 (pp. 5479-5484)

Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source. / Ikeda, Tatsunori; Tsuji, Takeshi; Takanashi, Mamoru; Kurosawa, Isao; Nakatsukasa, Masashi; White, Donald; Worth, Kyle; Roberts, Brian.

SEG Technical Program Expanded Abstracts 2016. 2016. p. 5479-5484.

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

Ikeda, T, Tsuji, T, Takanashi, M, Kurosawa, I, Nakatsukasa, M, White, D, Worth, K & Roberts, B 2016, Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source. in SEG Technical Program Expanded Abstracts 2016. pp. 5479-5484.
Ikeda T, Tsuji T, Takanashi M, Kurosawa I, Nakatsukasa M, White D et al. Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source. In SEG Technical Program Expanded Abstracts 2016. 2016. p. 5479-5484
Ikeda, Tatsunori ; Tsuji, Takeshi ; Takanashi, Mamoru ; Kurosawa, Isao ; Nakatsukasa, Masashi ; White, Donald ; Worth, Kyle ; Roberts, Brian. / Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source. SEG Technical Program Expanded Abstracts 2016. 2016. pp. 5479-5484
@inproceedings{ac9198924e10415f9bc03fc587c318ce,
title = "Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source",
abstract = "We performed time-lapse surface-wave analysis to monitor the shallow subsurface at the Aquistore CO2 storage site, managed by the Petroleum Technology Research Centre, Canada. A continuous and controlled seismic source system called the Accurately Controlled Routinely Operated Signal System (ACROSS) is used to enhance the temporal resolution and source repeatability in the monitoring. We extracted hourly-variation of surface-wave phase velocities from continuous seismic data with 4 hour stacking. As a result, we could monitor phase velocities within 1 {\%} accuracy during 1-9 days in the frequency range of 4.5-6 Hz. We identified 2-5 {\%} seasonal variation of phase velocities. The high phase velocities observed in winter can be explained by the degree of freezing of partially saturated rock. Our time-lapse results contributed to improving the accuracy of monitoring deep reflections from the CO2 injection reservoir by correcting seasonal variations of near-surface velocity. The high temporal resolution and accuracy of our monitoring results have the potential to identify sudden changes such as CO2 leakage from CO2 storage sites.",
author = "Tatsunori Ikeda and Takeshi Tsuji and Mamoru Takanashi and Isao Kurosawa and Masashi Nakatsukasa and Donald White and Kyle Worth and Brian Roberts",
year = "2016",
month = "9",
day = "1",
language = "English",
pages = "5479--5484",
booktitle = "SEG Technical Program Expanded Abstracts 2016",

}

TY - GEN

T1 - Time-lapse monitoring of shallow subsurface in the Aquistore CO2 storage site from surface-wave analysis using a continuous and controlled seismic source

AU - Ikeda, Tatsunori

AU - Tsuji, Takeshi

AU - Takanashi, Mamoru

AU - Kurosawa, Isao

AU - Nakatsukasa, Masashi

AU - White, Donald

AU - Worth, Kyle

AU - Roberts, Brian

PY - 2016/9/1

Y1 - 2016/9/1

N2 - We performed time-lapse surface-wave analysis to monitor the shallow subsurface at the Aquistore CO2 storage site, managed by the Petroleum Technology Research Centre, Canada. A continuous and controlled seismic source system called the Accurately Controlled Routinely Operated Signal System (ACROSS) is used to enhance the temporal resolution and source repeatability in the monitoring. We extracted hourly-variation of surface-wave phase velocities from continuous seismic data with 4 hour stacking. As a result, we could monitor phase velocities within 1 % accuracy during 1-9 days in the frequency range of 4.5-6 Hz. We identified 2-5 % seasonal variation of phase velocities. The high phase velocities observed in winter can be explained by the degree of freezing of partially saturated rock. Our time-lapse results contributed to improving the accuracy of monitoring deep reflections from the CO2 injection reservoir by correcting seasonal variations of near-surface velocity. The high temporal resolution and accuracy of our monitoring results have the potential to identify sudden changes such as CO2 leakage from CO2 storage sites.

AB - We performed time-lapse surface-wave analysis to monitor the shallow subsurface at the Aquistore CO2 storage site, managed by the Petroleum Technology Research Centre, Canada. A continuous and controlled seismic source system called the Accurately Controlled Routinely Operated Signal System (ACROSS) is used to enhance the temporal resolution and source repeatability in the monitoring. We extracted hourly-variation of surface-wave phase velocities from continuous seismic data with 4 hour stacking. As a result, we could monitor phase velocities within 1 % accuracy during 1-9 days in the frequency range of 4.5-6 Hz. We identified 2-5 % seasonal variation of phase velocities. The high phase velocities observed in winter can be explained by the degree of freezing of partially saturated rock. Our time-lapse results contributed to improving the accuracy of monitoring deep reflections from the CO2 injection reservoir by correcting seasonal variations of near-surface velocity. The high temporal resolution and accuracy of our monitoring results have the potential to identify sudden changes such as CO2 leakage from CO2 storage sites.

M3 - Conference contribution

SP - 5479

EP - 5484

BT - SEG Technical Program Expanded Abstracts 2016

ER -