Stability of methane hydrate bearing sands and efficient production method in methane hydrate exploitation from deep seabed

2012 Fiscal Year Final Research Report

• Project/Area Number: 20246080
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Yamaguchi University
• Principal Investigator: HYODO Masayuki 山口大学, 大学院・理工学研究科, 教授 (40130091)
• Co-Investigator(Kenkyū-buntansha): NAKATA Yukio 山口大学, 大学院・理工学研究科, 教授 (90274183) ; YOSHIMOTO Noromasa 山口大学, 大学院・理工学研究科, 助教 (00325242) ; SUZUKI Motoyuki 山口大学, 大学院・理工学研究科, 准教授 (00304494) ; TANAKA Kazuhiro 山口大学, 大学院・理工学研究科, 准教授 (30188289)
• Project Period (FY): 2008 – 2012
• Keywords: メタンハイドレート胚胎土 / 高圧 / 平面ひずみ三軸 / 局所変 / FEM 解析

Research Abstract

High pressure and low temperature plane strain testing apparatus was developed for visualizing deformation of methane hydrate bearing sand due to methane hydrate production. Using this testing apparatus, plane strain compression tests and methane hydrate dissociation test by depressurization method were performed. By using image analysis, shear band of methane hydrate bearing sand was observed. The constitutive model for MH bearing soils which was developed in the previous study was applied to FEM and was analyzed the same problem as the experiment. The analytical results had good corresponding with the experimental results.

Research Products

• [Journal Article] Localised deformation of methane hydrate-bearing sand in plain strain shear tests (2013)
  • Author(s): Yoneda, J., Hyodo, M., Yoshimoto, N., Nakata, Y.and a Kato, A
  • Journal Title: Soils and Foundations
  • Peer Reviewed
• [Journal Article] Mechanical and dissociation properties of methane hydrate-bearing sand in deep seabed (2013)
  • Author(s): Hyodo, M., Yoneda, J., Yoshimoto, N. and Nakata, Y
  • Journal Title: Soils and Foundations Volume: Vol.53, No.2 Pages: 299-314
  • URL: http://dx.doi.org/10.1016/j.sandf.203.02.010
  • Peer Reviewed
• [Journal Article] 高圧下におけるメタンハイドレート固結砂の平面ひずみせん断挙動と局所化の評価 (2011)
  • Author(s): 今村豊、米田純,兵動正幸,中田幸男,吉本憲正
  • Journal Title: 地盤工学会中国支部論文報告集「地盤と建設」 Volume: Vol.28, No.1 Pages: 95-104
  • Peer Reviewed
• [Presentation] 高圧平面ひずみ三軸試験によるメタンハイドレートを含む細粒分混じり砂のガス生産時の挙動と評価 (2012)
  • Author(s): 梶山慎太郎,兵動正幸,中田幸男,吉本憲正,加藤晃
  • Organizer: 第4回メタンハイドレート総合シンポジウム
  • Place of Presentation: 産業技術総合研究所臨海副都心センター(東京都)
  • Year and Date: 2012-12-13
• [Presentation] 平面ひずみ試験によるメタンハイドレートを含む砂の局所せん断変形挙動 (2011)
  • Author(s): 加藤晃,兵動正幸,中田幸男,吉本憲正
  • Organizer: 第3回メタンハイドレート総合シンポジウム
  • Place of Presentation: 産業技術総合研究所臨海副都心センター(東京都)
  • Year and Date: 2011-11-30
• [Presentation] Deformation of seabed due to exploitation of methane hydrate reservoir, Proc (2010)
  • Author(s): Yoneda, J., Hyodo, M., Yoshimoto, N., Nakata, Y. and Orense, R
  • Organizer: 2nd International Symposium on Frontiers in Offshore Geotechnics
  • Place of Presentation: Perth, (Australia)
  • Year and Date: 2010-11-08
• [Presentation] Deformation of the seabed due to exploitation of methane hydrate reservoir, Proc. (2010)
  • Author(s): Yoneda, J., Hyodo, M., Yoshimoto, N., Nakata, Y.
  • Organizer: International Symposium on Geomechanics and Geotechnics
  • Place of Presentation: Shanghai, (China)
  • Year and Date: 2010-10-10
• [Presentation] Mechanical properties of methane hydrate-bearing sand and its deformation during dissociation of methane hydrate, Proc (2009)
  • Author(s): Yoneda, J., Hyodo, M., Yoshimoto, N., Nakata, Y
  • Organizer: the 4th Asia-Pacific Conference on Unsaturated Soils
  • Place of Presentation: Newcastle, (Australia)
  • Year and Date: 2009-11-23