Real Time Imaging of CO2 Storage Zone by Very Accurate- stable-long Term Seismic Source
2013; Elsevier BV; Volume: 37; Linguagem: Inglês
10.1016/j.egypro.2013.06.309
ISSN1876-6102
AutoresJunzo Kasahara, Shinji Ito, Tomohiro Fujiwara, Yoko Hasada, K. Tsuruga, Ryoya Ikuta, Naoyuki Fujii, Koshun Yamaoka, Kiyoshi Ito, K. Nishigami,
Tópico(s)Seismology and Earthquake Studies
ResumoTo examine the effectiveness of our time lapse method for CCS monitoring, we carried out a field-test in Japan using an ultra-stable seismic source. We injected 80-tons air in total into 100 m depth. We obtained transfer functions between the source and 31 seismometers. All residual waveforms between before and after the injection revealed very large changes on records. A station at 200m distance from the injected-well showed 10ms travel-time delay at 1-day after the injection. The time-reversal imaging showed the clear image for spreading of disturbed area from the injection point to eastward with elapsed times.
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