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Carbon dioxide (CO2) is the most great greenhouse gas affecting to global warming. Therefore, the international cooperation for the control and reduction of CO2 emissions is needed. IPCC (Intergovernmental Panel on Climate Change) is being reported as the most serious problem to global climate change caused by CO2 emission. Korea is the 10th of CO2 emission countries. Thus the technology of research and development for CO2 reduction is significantly needed. The CO2 geological storage technology is to store carbon dioxide in a geological formation safely for reducing greenhouse gas emissions. The best places for CO2 geological storage are depleted oil and gas fields, coal beds, and deep saline aquifer. These are porous rocks such as sandstone located underneath a layer of impermeable cap rocks. Potential storage sites should be carefully selected and managed in order to minimize any chance of CO2 leakage. Once the CO2 has been stored in the site, the site need to be monitored by using geophysical methods (e.g., time-lapse seismic, electromagnetic, gravity or density changes) and well logging. Oil and gas fields as candidate sites around Korea are very rare. Therefore, our main target is deep saline aquifer characterized by porous media. Although a couple of potential areas in the southern Ulleung Basin would carefully be recommended based on our current knowledge, more work needs to be done to assess their potential sites for CO2 storage. CO2 geological storage could contribute a significant part of the solution to the global warming problem.
이산화탄소는 지구온난화에 영향을 주는 가장 주요한 온실가스이다. 따라서 이산화탄소의 배출을 억제하고 조절하기 위한 국제적인 협조가 필요하며 정부간기후변화위원회(IPCC)는 이산화탄소가 지구 기후 변화에 대한 심각한 영향을 주는 것으로 보고하고 있다. 우리나라의 온실가스 배출량이 세계 10위로 배출량을 급격하게 줄여야 할 경우 심각한 경제적 손실 및 위기를 초래할 것으로 보고 있다. 이산화탄소의 지중처리 기술은 온실가스 배출을 감소시키기 위하여 지중에 안전하게 이산화탄소를 저장하는 것이다. 지중저장의 경우 가장 적합한 장소는 고갈된 가스나 유전, 석탄층, 심해염수층 등이다. 이런 층들은 불투수층의 덮개암을 가지고 있고 사질의 다공질암석이 그 하부층에 존재하는 특징을 가지는 구조다. 이산화탄소 지중 처분 장소는 이산화탄소가 누출되지 않도록 주의 깊게 선정되어야하며 처분후에는 지구물리적 방법이나 검층 등을 이용하여 계속적인 모니터가 필요하다. 한반도 주변의 경우 후보지로서 가스전/유전 등이 드물기 때문에 염대수층을 대상으로 하는 것이 바람직할 것으로 본다. 지금까지의 자료에 의하면 몇 군데 적당한 장소로 고려해볼 수 있는 구조들이 울릉분지 남부지역에 존재하지만 더 많은 조사가 필요할 것으로 본다. 이산화탄소의 처분 및 저장기술이 잘 개발될 경우 지구온난화의 해결에 도움이 될 것으로 사료된다.
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- Publisher :The Korean Society of Mineral and Energy Resources Engineers
- Publisher(Ko) :한국자원공학회
- Journal Title :Journal of the Korean Society for Geosystem Engineering
- Journal Title(Ko) :한국지구시스템공학회지
- Volume : 44
- No :6
- Pages :572-585


Journal of the Korean Society of Mineral and Energy Resources Engineers







