TY - JOUR
T1 - Continuous monitoring system for safe managements of CO2 storage and geothermal reservoirs
AU - Tsuji, Takeshi
AU - Ikeda, Tatsunori
AU - Matsuura, Ryosuke
AU - Mukumoto, Kota
AU - Hutapea, Fernando Lawrens
AU - Kimura, Tsunehisa
AU - Yamaoka, Koshun
AU - Shinohara, Masanao
N1 - Funding Information:
This work was conducted under the “Sustainable CCS project” of the Ministry of the Environment, Government of Japan. T. Kunitomo and T. Watanabe (Nagoya University) and J. Kinoshita (Kyushu University) supported the deployment of the monitoring system and seismometers. We are grateful to the National Research Institute for Earth Science and Disaster Prevention (NIED) for providing us with the Hi-net data. We thank Y. Yamaura (West Jec) for supporting the deployment of seismometers. We also thank to Kyushu Electric Power CO., INC., because the company provided the geothermal data shown in Fig. 8b. This study was partially supported through the Japan Society for the Promotion of Science KAKENHI Grants JP20H01997 and JP20K04133.
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12
Y1 - 2021/12
N2 - We have developed a new continuous monitoring system based on small seismic sources and distributed acoustic sensing (DAS). The source system generates continuous waveforms with a wide frequency range. Because the signal timing is accurately controlled, stacking the continuous waveforms enhances the signal-to-noise ratio, allowing the use of a small seismic source to monitor extensive areas (multi-reservoir). Our field experiments demonstrated that the monitoring signal was detected at a distance of ~ 80 km, and temporal variations of the monitoring signal (i.e., seismic velocity) were identified with an error of < 0.01%. Through the monitoring, we identified pore pressure variations due to geothermal operations and rains. When we used seafloor cable for DAS measurements, we identified the monitoring signals at > 10 km far from the source in high-spatial resolution. This study demonstrates that multi-reservoir in an extensive area can be continuously monitored at a relatively low cost by combining our seismic source and DAS.
AB - We have developed a new continuous monitoring system based on small seismic sources and distributed acoustic sensing (DAS). The source system generates continuous waveforms with a wide frequency range. Because the signal timing is accurately controlled, stacking the continuous waveforms enhances the signal-to-noise ratio, allowing the use of a small seismic source to monitor extensive areas (multi-reservoir). Our field experiments demonstrated that the monitoring signal was detected at a distance of ~ 80 km, and temporal variations of the monitoring signal (i.e., seismic velocity) were identified with an error of < 0.01%. Through the monitoring, we identified pore pressure variations due to geothermal operations and rains. When we used seafloor cable for DAS measurements, we identified the monitoring signals at > 10 km far from the source in high-spatial resolution. This study demonstrates that multi-reservoir in an extensive area can be continuously monitored at a relatively low cost by combining our seismic source and DAS.
UR - http://www.scopus.com/inward/record.url?scp=85115789141&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85115789141&partnerID=8YFLogxK
U2 - 10.1038/s41598-021-97881-5
DO - 10.1038/s41598-021-97881-5
M3 - Article
C2 - 34580338
AN - SCOPUS:85115789141
VL - 11
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 19120
ER -