Measurement of thermal conductivity of hydrate sediment sample

Yoshitaka Yamamoto, Taro Kawamura, Michica Ohtake, Takeshi Komai, Fumio Nakagawa, Tomoya Tsuji, Yuichi Tsukada

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

The thermal conductivities of the natural gas hydrate core samples and the mud layer core samples, which were recovered from the sedimentary layers under sea bottom offshore Japan, were measured with hot-disc transient method at the higher-pressure conditions that imitates the actual original sedimentary layer under both gas-saturated and water-saturated condition. As a result, at the temperatures higher than melting point of ice, the thermal conductivity of natural gas hydrate sediment sample under water-saturated condition was very close to that with gas-saturated condition. It suggests that pore space of recovered hydrate sediment samples was already filled with water. Regarding to the temperature dependence, the thermal conductivity of natural hydrate core sample was decreased discontinuously around the melting point of ice and became much lower value than that at the sub-zero temperatures. It seamed because water in pore space of the sample sediment was melted around the temperature. On the other hands, the thermal conductivity of natural mud layer core sample wasn't changed so much with temperature from 263K to 283K. Calculations of thermal conductivity with some mixing models were also carried out to examine the applicability of those to the natural hydrate sediment samples.

本文言語English
ホスト出版物のタイトルProceedings of the International Offshore and Polar Engineering Conference
ページ341-345
ページ数5
出版ステータスPublished - 2005
外部発表はい
イベント15th International Offrshore and Polar Engineering Conference, ISOPE-2005 - Seoul, Korea, Republic of
継続期間: 2005 6月 192005 6月 24

出版物シリーズ

名前Proceedings of the International Offshore and Polar Engineering Conference
2005
ISSN(印刷版)1098-6189
ISSN(電子版)1555-1792

Other

Other15th International Offrshore and Polar Engineering Conference, ISOPE-2005
国/地域Korea, Republic of
CitySeoul
Period05/6/1905/6/24

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 海洋工学
  • 機械工学

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