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 Ohmura, Hideo Narita

Research output: Contribution to journalArticle

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

Fingerprint

Bearings (structural)
Hydrates
Sediments
Methane
X rays
Decomposition
Energy resources
Gases
Luminance

Keywords

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

ASJC Scopus subject areas

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

Cite this

A dissociation behavior of methane hydrate-bearing sediment using high-speed X-ray CT scanner. / Kamata, Yasushi; Sato, Mitsutaka; Ono, Shinji; Ebinuma, Takao; Nagao, Jiro; Minagawa, Hideki; Ohmura, Ryo; Narita, Hideo.

In: Proceedings of the International Offshore and Polar Engineering Conference, 2005.

Research output: Contribution to journalArticle

Kamata, Yasushi ; Sato, Mitsutaka ; Ono, Shinji ; Ebinuma, Takao ; Nagao, Jiro ; Minagawa, Hideki ; Ohmura, Ryo ; Narita, Hideo. / A dissociation behavior of methane hydrate-bearing sediment using high-speed X-ray CT scanner. In: Proceedings of the International Offshore and Polar Engineering Conference. 2005.
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AU - Ohmura, Ryo

AU - Narita, Hideo

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AB - 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).

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