| 应力松弛作用对未固结砂岩等效弹性性质的影响 |
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| 引用本文： | 邓继新,韩德华.应力松弛作用对未固结砂岩等效弹性性质的影响[J].吉林大学学报(地球科学版),2011,41(1):283-291. |
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| 作者姓名： | 邓继新 韩德华 |
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| 作者单位： | 成都理工大学,地球物理学院,成都,610059;休斯顿大学,地球科学系,休斯顿,77036,美国 |
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| 基金项目： | 国家"973"计划项目，国家自然科学基金 |
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| 摘 要： | 未固结碎屑砂岩储层是国内外重要的油气储层类型之一,其物理本质是由离散颗粒组成的软凝聚态物质.在地震勘探中通常使用Hertz-Mindlin等效介质模型来计算未固结砂岩的地震弹性特征,但该模型在使用中通常会得到明显偏高的剪切模量值.基于3D离散元技术,对颗粒介质在单轴压缩与纯剪两种过程中的力学响应进行离散元数值模拟,从微...
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| 关 键 词： | 未固结砂岩 应力松弛 离散元 Hertz-Mindlin接触模型 弹性模量 |
Influence of Stress Relaxation on the Elastic Properties of Unconsolidated Sands |
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| DENG Ji-xin,De-hua HAN .College of Geophysics,Chengdu University of Technology,Chengdu ,China .Geoscience.Influence of Stress Relaxation on the Elastic Properties of Unconsolidated Sands[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(1):283-291. |
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| Authors: | DENG Ji-xin De-hua HAN College of Geophysics Chengdu University of Technology Chengdu China Geoscience |
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| Institution: | DENG Ji-xin1,De-hua HAN2 1.College of Geophysics,Chengdu University of Technology,Chengdu 610059,China 2.Geoscience Department,University of Houston,Houston 77036,USA |
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| Abstract: | In the seismic exploration,effective medium theories based on Hertz-Mindlin equivalent medium model were often used to predict the seismic elastic properties of unconsolidated sands.But those theories often give relative larger shear modulus comparing to measured data.By using 3D discrete element simulation,a series of uniaxial compression and pure shear test were carried out on granular material for the sake to study the insufficiencies of those effective medium theories from the level of microscale of par... |
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| Keywords: | sand relaxation discrete element Hertz-Mindlin equivalent medium model elastic moduli |
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