Estimation of permeability distribution for cracked medium by wave velocity and permeability tensor

通过波速和渗透率张量估计裂纹介质的渗透率分布

• 批准号: 21760681
• 负责人: TAKEMURA Takato
• 金额: $ 2.91万
• 依托单位: Nihon University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760681/
• 关键词: 透水テンソル; クラックテンソル; 亀裂密度; 弾性波速度; 透水係数; 岩盤; クラック

In order to propose the hydrogeological model, we try to estimate permeability tensor defined by crack geometry and wave velocity. The permeability testing method was developed by using newly introduced vessel for permeability measurement and high-accuracy pump, and the permeability dependence with coffining pressure was measured. Here, the confining pressure is changing 0 to 10MPa. Additionally, the crack geometry was estimated by the multi directional wave velocity using the developed crack geometry - wave velocity relation. In this study, crack density per unit volume and crack anisotropy could be estimate by the distribution of wave velocities. The estimated permeability is almost correspond with the measured permeability.

为了建立水文地质模型，我们尝试估计由裂缝几何和波速定义的渗透率张量。采用新引进的渗透性测量容器和高精度泵，开发了渗透性测试方法，并测量了渗透性与棺压的相关性。此处围压变化为0 ~ 10MPa。此外，利用建立的裂缝几何-波速关系，用多向波速估计了裂缝的几何形状。在本研究中，可以通过波速分布估计单位体积裂缝密度和裂缝各向异性。估计的渗透率与实测渗透率基本吻合。

项目成果

Changes in permeability of cracked rock due to rotation of principal stress axes in terms of crack tensor and permeability tensor

由于主应力轴在裂纹张量和渗透率张量方面的旋转而导致的裂纹岩石渗透率的变化

• 发表时间: 2010
• 期刊: Proceedings of IVth International geomechanics conference
• 作者: Takemura;T.;Takahashi;M.
• 通讯作者: M.

固結砂岩の堆積構造と力学異方性の関係

固结砂岩沉积结构与力学各向异性的关系

• 发表时间: 2010
• 作者: 竹村貴人;藤井幸泰;朴赫;高橋学;高橋直樹
• 通讯作者: 高橋直樹

微視的構造から見た地質媒体の透水・力学特性

从微观结构看地质介质的渗透率和力学特性

• 发表时间: 2009
• 作者: 田中智行;岡田裕;岡澤重信;藤久保昌彦;竹村貴人
• 通讯作者: 竹村貴人