東北大学 · 工学
劉百龍教授の研究室では、非定常的で未固結な地下鉛直岩盤の力学的挙動と流体侵入に伴う透水率変化を、ナノスケールからマクロスケールまで統合的に解析する研究を行っています。特に、水圧破砲による微小ひびわれ生成と土壌粒子の膨張が多孔質媒体の透水性に与える影響を、ネットワークモデルと連成解析により解明しています。研究は、カーボンニュートラル技術や未利用資源の効率的回収に貢献することを目的としています。
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Summary Hydraulic fracturing can produce a main fracture and increase flow efficiency. It can also result in the invasion of fracturing fluid, which can produce clay swelling. The invasion can block the pores and throats in the porous media and damage matrix permeability, while it can also induce microcracks under certain conditions. This study developed a numerical model to evaluate the permeability change induced by the invasion. Both pore-throat clogging and microcracks are integrated into th
Summary With the development of unconventional resources, such as oil sands and methane hydrate reservoirs, the importance of the mechanical performance model for underground unconsolidated rocks has increased significantly. The commonly used numerical approach for unconsolidated rocks is the discrete-element method (DEM). However, the extensive calculations required by the DEM make it inadequate for simulating unconsolidated rock behavior on a field scale. An alternative is the continuum approa
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