Experimental study on steam injection method using methane hydrate core samples

T. Kawamura, M. Ohtake, Y. Sakamoto, Y. Yamamoto, H. Haneda, Takeshi Komai, S. Higuchi

研究成果: Conference contribution

21 被引用数 (Scopus)

抄録

Natural gas hydrate that exists in the ocean sediment is thought to constitute a large methane gas reservoir and is expected to be an energy resource in the future. In order to make recovery of natural gas from hydrates commercially viable, hydrates must be dissociated in-situ. Meanwhile, steam injection method is practically used for oil sand to recover heavy oil and recognized as a means that is commercially successful. In this study, the steam injection method for methane hydrate bearing sediments has been examined and discussed on an experimental basis. New experimental apparatus for steam injection has been designed and constructed. In-situ methane hydrate bearing sediments were simulated in laboratory scale. Using this apparatus, steam was successfully injected. And just after the depressurization, inner temperature at each area dropped down to approximately 0 deg C caused by the combination of endothermic reaction of hydrate dissociation and exothermic reaction of ice formation. Also, the phase transition from vapor water to liquid water in methane hydrate bearing sediments was observed. Obtained temperature profile suggested that phase transition from steam to liquid water occur at upstream area (from 25mm to 75mm from top of the core). Additionally, reaching point of steam moved back and forth around this area. From the gas production behavior, it can be concluded that roughly 44% of total hydrate origin gas was produced after steam injection.

本文言語English
ホスト出版物のタイトルProceedings of The Seventh 2007 ISOPE Ocean Mining (and Gas Hydrates) Symposium
ページ83-86
ページ数4
出版ステータスPublished - 2007 10 1
外部発表はい
イベント7th 2007 ISOPE Ocean Mining (and Gas Hydrates) Symposium - Lisbon, Portugal
継続期間: 2007 7 12007 7 6

Other

Other7th 2007 ISOPE Ocean Mining (and Gas Hydrates) Symposium
CountryPortugal
CityLisbon
Period07/7/107/7/6

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering

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