지질공학 (The Journal of Engineering Geology)

  • 제28권1호
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  • Pages.35-45
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  • 2018
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  • 1226-5268(pISSN)
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  • 2287-7169(eISSN)
대한지질공학회 (The Korean Society of Engineering Geology)
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이미징기술을 활용한 코어규모의 다상유체 유동 특성화: 이산화탄소 지중저장 연구에의 적용

Use of an Imaging Technology for Characterizing Core-scale Multiphase Flow: Application to CO2 Geological Storage

  • 김구영 (한국지질자원연구원 전략기술연구본부 CO2지중저장연구단)
  • Kim, Kue-Young (Korea Institute of Geoscience and Mineral Resources, Climate Change Mitigation and Sustainability Division)
  • 투고 : 2018.01.11
  • 심사 : 2018.02.26
  • 발행 : 2018.03.31
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초록

이미징 기술은 매질 자체의 구조특성 뿐만 아니라 유체의 유동특성을 분석하기 위해 공극규모, 코어규모, 그리고 중급규모에서 다양하게 활용되고 있다. 본 기술보고에서는 코어규모에서 유동실험과 이미징기술을 연계하여 균질매질, 균열매질, 그리고 불균질매질에서의 이산화탄소($CO_2$) 유동 특성과 함께 $CO_2$ 주입시 주입관정 주변에서 발생할 수 있는 염침전 현상, 균질매질과 균열매질에서의 모세관압 평가, 그리고 $CO_2$ 주입이 완료된 이후 나타나는 포획메커니즘 평가 등에 대해 살펴보았다. 이미징기술을 통해 코어내에서 시간에 따른 $CO_2$ 플룸을 이미지화 함으로써 유동특성을 분석할 수 있으며, 특히 균열이 포함된 매질과 불균질한 매질에서의 유동 및 저장특성을 평가할 수 있다.

Imaging technologies are applied at various geological scales including pore scale, core scale and intermediate scale in order to characterize pore space of rocks as well as to map the fluid distribution in porous media. This technical report presents experimental results using core-flooding apparatus suited with imaging technology. Three different core samples, that are homogeneous, fractured and heterogeneous cores, were used to assess the two-phase fluid migration behavior as $CO_2$ displaces resident brine. We show that imaging technology can be effective in characterizing salt-precipitation, capillary pressure and spatio-temporal variation of trapping mechanisms.

키워드

참고문헌

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