Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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A Case Study of Test Production of Gas from Hydrate Bearing Sediments on Nankai Trough in Japan

일본 난카이 해구 가스하이드레이트 퇴적층으로부터의 가스 시험생산 사례분석

  • 김아람 (세종대학교 공과대학 에너지자원공학과) ;
  • 이종원 (세종대학교 공과대학 에너지자원공학과) ;
  • 김형목 (세종대학교 에너지자원공학과)
  • Received : 2015.04.07
  • Accepted : 2015.04.24
  • Published : 2015.04.30
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Abstract

Gas hydrate is a solid substance composed of natural gas constrained in water molecules under low temperature and high pressure conditions. The existence of hydrates has been reported to be world-widely distributed, mainly at permafrost and deep ocean floor. Test productions of small amount of natural gas from the on-shore permafrost have been accomplished in U.S.A and Canada, but, world-first and the only production case from off-shore hydrate bearing sediments was in Nankai trough, Japan. In this study, we introduce key technologies in gas production from hydrates by analyzing the Japanese off-shore gas production project in Nankai trough in terms of depressurization- induced dissociation so as to utilize planned domestic gas production test in Ulleung basin.

가스하이드레이트는 천연가스가 저온 고압 상태에서 물과 결합하여 형성되는 고체 물질로 전세계 영구동토 및 심해저 퇴적층에 광범위하게 분포하는 것으로 파악되고 있다. 미국과 캐나다의 육상 영구동토에서 소량의 가스 생산 실증시험 사례가 보고된 바 있으나 심해저 가스하이드레이트로부터의 해상 가스 생산 사례는 일본 난카이 해구에서의 시험 생산이 유일하다. 본 연구에서는 일본 난카이 해구에서 실시된 해저 가스하이드레이트 함유층으로부터 감암법을 이용한 해리 가스 생산 사례를 분석하고 관련 핵심기술을 파악함으로써 국내에서 준비 중인 동해 울릉분지 유망 부지에서의 가스 시험생산에 활용코자 하였다.

Keywords

References

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  1. Numerical Analysis for Fault Reactivation during Gas Hydrate Production vol.26, pp.2, 2016, https://doi.org/10.7474/TUS.2016.26.2.059