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Geomechanical Stability Analysis of Potential Site for Domestic Pilot CCS Project

국내 이산화탄소 지중격리저장 실증실험 후보부지의 역학적 안정성 평가 기초해석

  • 김아람 (세종대학교 공과대학 에너지자 원공학과) ;
  • 김형목 ;
  • 김현우 (한국지질자원연구원 전략기술연구본부 심지층연구단) ;
  • 신영재 (한국지질자원연구원 석유해저연구본부)
  • Received : 2017.04.07
  • Accepted : 2017.04.26
  • Published : 2017.04.30

Abstract

For a successful performance of Carbon Capture Sequestration (CCS) projects, appropriate injection conditions should be designed to be optimized for site specific geological conditions. In this study, we built a simple 2-dimensional analysis model, based on the geology of Jang-gi basin which is one of the potential sites of domestic CCS projects. We evaluated the impact of initial stress conditions and injection rate through coupled TOUGH-FLAC simulator. From the preliminary analysis, we constructed risk scenarios with the higher potential of shear slip and performed scenario analysis. Our analysis showed that normal stress regime produced the highest potential of shear slip and stepwise increasing injection rate scenario resulted in much larger pore pressure build up and consequent higher potential of the shear slip, which was evaluated using a mobilized friction coefficient.

Keywords

CCS (Carbon Capture and Sequestration);Initial stress conditions;Potential of shear slip;Mobilized friction coefficient;Risk scenario analysis

Acknowledgement

Supported by : (재)한국이산화탄소포집 및 처리연구개발센터, 한국연구재단

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