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The fate of gas migration paths in the gas hydrate-bearing sediments in the Sea of Okhotsk

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Title
The fate of gas migration paths in the gas hydrate-bearing sediments in the Sea of Okhotsk
Other Titles
오호츠크해 가스하이드레이트 퇴적층내 가스 이동 통로의 운명
Authors
Jin, Young Keun
H.Shoji
Chung, Kyung Ho
Kim, Yeadong
A.Salomatin
A.Obzhirov
V.Gladysh
Keywords
chimney structures; gas hyd; gas migration; the Sea of okhotsk
Issue Date
2005
Citation
Jin, Young Keun, et al. 2005. The fate of gas migration paths in the gas hydrate-bearing sediments in the Sea of Okhotsk. 한국지질자원연구원, 한국지구시스템공학회. 한국지질자원연구원, 한국지구시스템공학회. 2005.11.11~.
Abstract
High-resolution seismic profiles show distinct chimney structures (hereafter gas chimney) imbedded in gas-hydrate-bearing sediments while hydroacoustic profiles capture ongoing methane-emission features into the water column in the Sea of Okhotsk. On the profiles, we identify two kinds of chimney structures through the gas hydrate-bearing sediments, which are interpreted as active and non-active migration paths of methane. We propose that during methane release, a wide gas chimney with enhanced reflection is formed along the path due to lateral saturation of gas into the surrounding permeable sedimentary layers, after stoppage of methane release the gas chimney becomes a narrow wipe-out gas-hydrate chimney filled with highly concentrated gas hydrate converted from enriched gases along the path.
URI
http://repository.kopri.re.kr/handle/201206/7597
Conference Name
한국지질자원연구원, 한국지구시스템공학회
Conference Place
한국지질자원연구원, 한국지구시스템공학회
Conference Date
2005.11.11~
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