Geophysics and Geophysical Exploration (지구물리와물리탐사)

Korean Society of Earth and Exploration Geophysicists (한국지구물리·물리탐사학회)
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Experimental Study on Estimation of $CO_2$ Saturation by the Electrical Resistivity Monitoring during $CO_2$ Injection for Rock Samples

$CO_2$ 지중저장에 의한 전기비저항 모니터링 및 포화도 예측을 위한 실험 연구

  • Kim, Jong-Wook (Department of Civil & Earth Resources Engineering, Kyoto University) ;
  • Song, Young-Soo (Department of Mineral Resources & Energy Engineering, Chonbuk National University)
  • 김종욱 (일본 교토대학교 사회기반공학 전공 지질공학) ;
  • 송영수 (전북대학교 자원에너지 공학과)
  • Received : 2010.09.09
  • Accepted : 2010.11.11
  • Published : 2010.11.30
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Abstract

As a part of basic studies on monitoring and saturation estimation of carbon dioxide ($CO_2$) storage using resistivity survey, laboratory experiment has been conducted to measure the change of the electrical resistivity through repeated experiments of supercritical $CO_2$ and brine water injection into homogeneous and heterogeneous sandstones. The $CO_2$ saturation is estimated by using resistivity index based on the resistivity measurements. The experimental results of two types of sandstones show that the effect of pore structure in the rock and the effect of contained clay minerals in the rock can be affected to calculate the $CO_2$ saturation. The result can be useful to evaluate the $CO_2$ saturation based on resistivity survey at the site where $CO_2 sequestrates.

이 논문은 전기비저항 관측을 이용한 이산화탄소($CO_2$)의 지중저장 모니터링 및 포화도 산정에 관한 실험 연구로, 균질한 시료 및 불균질한 시료에 대해 초임계$CO_2$와 염수의 주입 및 반복 실험을 통하여 전기비저항의 변화를 고찰하고 이로부터 전기비저항 지수를 이용하여 $CO_2$ 포화도를 추정하였다. 두 암석시료에 대해 실험한 결과, 시료 내부의 공극구조에 따른 영향과 함유된 점토 광물의 영향이 포화도 산출하는데 있어서 영향을 미치고 있음을 확인하였다. 이러한 결과는 실제 저류층에서의 전기비저항에 따른 $CO_2$ 포화도 추정의 정량적 평가에 있어 유용한 기초 자료가 된다.

Keywords

References

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