Coupled Hydrological-mechanical Behavior Induced by CO2 Injection into the Saline Aquifer of CO2CRC Otway Project

호주 오트웨이 프로젝트 염수층 내 CO2 주입에 따른 수리-역학적 연계거동 분석

  • Received : 2016.04.20
  • Accepted : 2016.05.12
  • Published : 2016.06.30


The present study numerically simulated the CO2 injection into the saline aquifer of CO2CRC Otway pilot project and the resulting hydrological-mechanical coupled process in the storage site by TOUGH-FLAC simulator. A three-dimensional numerical model was generated using the stochastic geological model which was established based on well log and core data. It was estimated that the CO2 injection of 30,000t over a period of 200 days increased the pressure near the injection point by 0.5 MPa at the most. The pressure increased rapidly and tended to approach a certain value at an early stage of the injection. The hydrological and mechanical behavior observed from the CO2 flow, effective stress change and stress-strength ratio revealed that the CO2 injection into the saline aquifer under the given condition would not have significant effects on the mechanical safety of the storage site and the hydrological state around the adjacent fault.


TOUGH-FLAC simulator;Otway pilot project;CO2 storage;Hydrological-mechanical coupled analysis


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Grant : 심부 지오시스템 특성 평가기술 개발, 호주 오트웨이 파일럿 프로젝트 참여를 통한 지중저장 실증 기반구축 사업

Supported by : 한국지질자원연구원, 한국에너지기술평가원