Shape Reconstruction of Mud Flocculate in the Sand and Mud Alternate Layer

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  • OYAMA Hiroyuki
    Department of Ocean Technology, Policy, and Environment, Graduate School of Frontier Sciences, The University of Tokyo
  • OGINO Tomoya
    Department of Ocean Technology, Policy, and Environment, Graduate School of Frontier Sciences, The University of Tokyo
  • SATO Toru
    Department of Ocean Technology, Policy, and Environment, Graduate School of Frontier Sciences, The University of Tokyo
  • YASUDA Hisato
    Research and Education Faculty, Natural Sciences Cluster, Science and Technology Unit, Kochi University
  • TEMMA Norio
    Methane Hydrate Production Technology Research Group, Research Institute of Energy Frontier (RIEF), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST)
  • NAGAO Jiro
    Research Institute of Energy Frontier (RIEF), Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST)

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Other Title
  • 砂泥互層に含まれる泥凝集体の形状再構成に関する検討

Abstract

<p>It was recently found that mud flocculates, or flocs, coexist with methane hydrate within turbidite layers. Flocs may be susceptible to the flow of pure water originated form the dissociation of methane hydrate and can cause problems, such as well plugging or stratum deformation, in the case of long-term gas production. However, there is little information about flocs. We designed an observation apparatus which is capable of holding a grain of floc and obtained stereo-vision images. We reconstructed 3D models from stereo-vision images. Spherical harmonics series expansion was applied for the reconstructed 3D models, and we obtained numerical expressions of the flocs in order to numerically simulate fluid flows within sandy layers, which involve such flocs.</p>

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