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이산화탄소 지중저장을 위한 수리-역학 연동 해석 기술 개발 및 적용
권상기(Sangki Kwon),이혜지(Hyeji Lee) 한국암반공학회 2017 터널과지하공간 Vol.27 No.3
세계 각국에서는 지구온난화 완화를 위한 이산화탄소 지중저장에 대한 관심이 높다. 본 연구에서는 이산화탄소 지중저장에 따른 수리-역학적 복합거동 해석을 위해 TOUGH2 와 FLAC3D 를 결합하고 이를 노르웨이 슬라이프너 프로젝트에 적용하였다. 수리-역학 해석에서는 공극압에 의한 현지응력의 변화를 고려하였으며 주입공 상부의 덮개암의 투수계수 변화에 따른 수리-역학적 영향을 분석하였다. 일정 속도로 이산화탄소 를 주입하는 경우, 주입정에에서의 압력 및 포화도 변화, 암반에서의 포화도 변화, 시간과 위치에 따른 암반에서의 최대주응력 및 최소주응력의 변화, 주입 후 수직변위 및 수평변위의 변화를 파악할 수 있었다. 최대주응력은 주입초기에 빠르게 상승한 후 서서히 낮아지다가 초기 응력보다 높은 값으로 수렴하는 경향을 보였으며 최소주응력은 초기에 빠르게 증가하다가 초기값으로 복귀하는 경향을 보였다. 주입이 진행됨에 따라 지표에서는 융기가 점진적으로 발생하며 주입 후 2년이 경과한 시점에서 최대 15 mm 의 수직변위가 발생하였다. 덮개암의 투수계수를 3e-15 ㎡~3e-18 ㎡ 까지 변화시키면서 해석을 실시한 결과, 주입초기에는 투수계수에 반비례하여 주입공 압력과 지표면 융기가 증가하였다. CO₂ sequestration for alleviating global warming is a hot issue in the world. In this study, TOUGH2 and FLAC3D were combined for analyzing the hyro-mechanical coupling behaviors expected in CO₂ sequestration and applied it to Sleipner project carried out in Norway. In the analysis, the influence of pore pressure on in situ stress was considered and the influence of caprock permeability on hydro-mechanical behaviors was analyzed. In the condition of constant injection rate, pressure and saturation at the injection well, liquid and gas saturation in rock, major and minor stress variations with time and distance from the injection well, and horizontal and vertical displacements after injection could be investigated. The major principal stress was quickly increased in the early stage and then slowly decreased to a stable value, which was higher than the initial value. In contrast, the minor principal stress returned to initial value after some increase in the early stage. Surface upheaval was steadily increased and it was up to 15mm in 2 years after injection. When the caprock"s permeability was changed from 3e-15 ㎡ ~ 3e-18 ㎡, it was found that the injection well pressure and surface upheaval were inversely propotional to the permeability.
백승국 ( Seung Kuk Baik ),이혜지 ( Hyeji Lee ),김강석 ( Gang Suk Kim ) 한국기호학회 2013 기호학연구 Vol.35 No.-
The purpose of this paper is to apply the concept and methodology from semiotics of passion to cultural contents of sensibility. It is because massive attention to the functional contents which rises healing effect on contents` users` sensibility is being enhanced in cultural contents field that is applying emotional and psychological methodology these days. Semiotics of passion affected in people`s concern on the signification of passion`s principal agent that exists by the actual figure of body between narrator and recognizer. While Ferdinand de Saussure couldn`t recognized the existence of a sensible body in the process of signification between a signifier and a signified, semiotics of passion built a theoretical foundation of one principal`s sensibility formation through a body`s sensible function. Greimas started to have interest in the mechanism of formation of passion on the basis of the two principle`s recognition area which is perception and sensation in discourse semiotics. Especially, the ``passion``, the main object of the study(semiotics of passion) is a logical investigation of semiotic principal`s emotional creation and extinction, responding at general signifiers. In other words, semiotics of passion is a study of the mechanism of emotional formation on how one`s sensibility is being created and extinguished. Cultural contents of sensibility is the contents which is produced to have emotional healing effectiveness for specific targets. Emotional healing aims at switching users` negative emotion to positive emotion consciously and unconsciously with sensible stimulation. Cultural contents of sensibility is the contents of functionality that move and arouse sensibility by stimulating people`s senses who enjoy it. Users can feel catharsis, reduce their stresses and suppress overindulgence through various elements of this functional contents. Particularly, <Dyslexia Quest>, a smart application for learning-disabled and <Blue Touch>, also a smart application for people who have depression are chosen to be analysed with methodologies of semiotics of passion as examples of cultural contents of sensibility. Semiotics of passion will work well as a methodology for creating cultural contents of sensibility that heals people`s emotion. However, it needs to make forward to be a practical study since it is hard to approach in themotion. ly and the study of semiotics of passion is inactive domestically.