Geophysics and Geophysical Exploration (지구물리와물리탐사)

Korean Society of Earth and Exploration Geophysicists (한국지구물리·물리탐사학회)
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Time-lapse Geophysical Monitoring of $CO_2$ Sequestration

시간 경과에 따른 반복적 물리탐사 기법을 이용한 이산화탄소의 지중처리 모니터링

  • Kim, Hee-Joon (Department of Environmental Exploration Engineering, Pukyong National University) ;
  • Choi, Ji-Hyang (Department of Civil, Urban and Geosystem Engineering, Seoul National University) ;
  • Han, Nu-Ree (Department of Civil, Urban and Geosystem Engineering, Seoul National University) ;
  • Nam, Myung-Jin (Department of Civil, Urban and Geosystem Engineering, Seoul National University) ;
  • Song, Yoon-Ho (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Tae-Jong (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Suh, Jung-Hee (Department of Civil, Urban and Geosystem Engineering, Seoul National University)
  • 김희준 (부경대학교 환경탐사공학과) ;
  • 최지향 (서울대학교 지구환경시스템공학부) ;
  • 한누리 (서울대학교 지구환경시스템공학부) ;
  • 남명진 (서울대학교 지구환경시스템공학부) ;
  • 송윤호 (한국지질자원연구원 지하수지열연구부) ;
  • 이태종 (한국지질자원연구원 지하수지열연구부) ;
  • 서정희 (서울대학교 지구환경시스템공학부)
  • Published : 2005.11.30
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Abstract

Geological sequestration of carbon dioxide ($CO_2$) is one of the most effective strategies far long-term removal of greenhouse gas from atmosphere. This paper reviews three projects for the $CO_2$ sequestration in geological formation. A unique $CO_2$ injection into a marine aquifer has been successfully monitored with repeated surface seismic measurements in the North Sea Sleipner West field. The seismic images reveal the extent and internal shape of the $CO_2$ bubble. Massive miscible $CO_2$ has been injected into a complex fractured carbonate reservoir at the Weyburn oil filed. High-resolution time-lapse P-wave data were successfully obtained to map the features of $CO_2$ movements within the two thin zones of different lithology. From the time-lapse crosswell EM imaging at the Lost Hills oil field in central California, U.S.A., the replacement of brine with $CO_2$ has been confirmed through a decrease of conductivity. The conductivity image was successfully compared with induction logs observed in the two wells.

장기적인 관점에서 띠 산화탄소 지중처리는 대기 중의 온실 가스를 제거하는 가장 효과적인 방법 중 하나이다. 본 해설에서는, 이산화탄소 지존처리를 위한 세 가지 모니터링 프로젝트에 대해 살펴보고자 한다. 먼저 북해 Sleipner West 필드의 경우로, 여기에서는 염류대수층에 이산화탄소를 주입하고, 해수면에서 반복적으로 탄성파탐사를 실시하였다. 이를 통해, 대수층 내에서 이산화탄소 기포가 확산된 범위와 형태를 파악하였다. 다음은 Weyburn 유전의 경우로, 복잡한 파쇄 구조로 된 탄산염 저류층에 대규모의 이산화탄소를 주입하고 있던 이 유전에서 시간 경과에 따른 고해상도 P파 탐사를 실시하여 각기 다른 암석으로 이루어진 두 지층 사이의 이산화탄소 거동특성을 파악하였다. 마지막으로, 미국 캘리포니아 중부에 위치한 Lost Hills 유전의 경우는 시간 경과에 따라 시추공간 전자탐사 영상화 기법을 적용하여 동일한 시추공에서 얻은 유도 검층 자료와 잘 일치하는 전기전도도 영상을 얻고, 전기전도도가 시간 경과에 따라 감소하는 것으로부터 이산화탄소가 염수를 대체했다는 사실을 확인하였다.

Keywords

References

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