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지구물리와 물리탐사 = Geophysics and geophysical exploration, v.17 no.4, 2014년, pp.216 - 230
김경진 (과학기술연합대학원대학교 석유자원공학과) , 이보연 (한국지질자원연구원 석유해저연구본부) , 강년건 (한국지질자원연구원 석유해저연구본부) , 유동근 (한국지질자원연구원 석유해저연구본부) , 신국선 (한국석유공사 석유개발기술원) , 조영호 (한국석유공사 석유개발기술원)
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Based on the interpretation of 3D seismic profiles acquired in the northwestern area of the Ulleung Basin, East Sea, the shallow sediments consist of five seismic units separated by regional reflectors. An anticline is present in the study area that documents activity of many faults. Bottom simulati...
| 핵심어 | 질문 | 논문에서 추출한 답변 |
|---|---|---|
| 가스하이드레이트는 어떤 형태로 존재하는가? | 가스하이드레이트는 저온·고압 조건하에서 천연가스와 물이 결합하여 얼음과 같은 형태로 존재하며, 주로 영구 동토지역과 심해저퇴적층에 분포한다(Collet et al., 2009). | |
| 국내에서 가스하이드레이트가 존재하는 지역은? | , 2000). 국내의 경우, 동해 남서부에 위치하는 울릉분지의 천부퇴적층에서 가스하이드레이트 부존이 확인되었으며, 1996년을 시작으로 한국지질자원연구원에 의해 본격적으로 연구가 수행되었다(Ryu et al., 2012). | |
| 3차원 탄성파 탐사자료에 따르면 가스하이드레이트와 탄성파 속성은 어떤 관계가 있는가? | 가스하이드레이트 안정영역 내에는 높은 RMS 진폭을 보이는 해저모방반사면과 낮은 RMS 진폭을 보이는 음향공백대가 특징적으로 분포한다. 탄성파 속성 분석에 의하면 가스하이드레이트와 자유가스가 동시에 부존한 경우 그 경계를 따라 순간진폭이 높게 나타나며 하부에서 순간주파수가 급격히 감소한다. 반면 가스하이드레이트만 존재하는 경우에는 하부에서 순간진폭이 낮고 순간주파수가 감소하지 않는다. 해저모방반사면의 주파수 성분 분해 결과 특정 고주파수 영역에서 나타나는 강한 진폭은 하부 자유가스에 의한 튜닝효과를 지시한다. |
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