A dissociation behavior of methane hydrate-bearing sediment using high-speed X-ray CT scanner

Yasushi Kamata, Mitsutaka Sato, Shinji Ono, Takao Ebinuma, Jiro Nagao, Hideki Minagawa, Ryo Omura, Hideo Narita

Research output: Contribution to journalConference article

Abstract

To use methane hydrate as an energy resource, it is necessary to establish decomposition methods for efficiently extracting methane gas from the methane hydrate-bearing layer. A core holder was installed in a High-Speed X-ray CT scanner to observe the dissociation behavior of methane hydrate-bearing sediment. Artificial methane hydrate-bearing sediment was made and dissociated by the depressurization method. The pressure in the sediment decreased immediately, and the sediment temperature decreased in proportion to the dissociation pressure. The CT luminance value decreased with the decomposition because hydrates in the sediment pore space were replaced from hydrates with methane gases. This is an abstract of a paper presented at the 15th International Offshore and Polar Engineering Conference (Seoul, Korea 6/19/2005).

Original languageEnglish
JournalProceedings of the International Offshore and Polar Engineering Conference
Publication statusPublished - 2005
Externally publishedYes
EventThe Fifteenth International Offshore and Polar Engineering Conference - ISOPE 2005 - Seoul, Korea, Republic of
Duration: 2005 Jun 192005 Jun 24

Keywords

  • Dissociation
  • Hydrate
  • Methane
  • Sediment
  • X-ray CT

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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