| 裂隙弱度参数的波场特征 |
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| 引用本文： | 杨德义,王赟,张美根.裂隙弱度参数的波场特征[J].地球物理学报,2011,54(3):862-866. |
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| 作者姓名： | 杨德义 王赟 张美根 |
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| 作者单位： | 1. 太原理工大学矿业工程学院, 太原 030024;
2. 中国科学院地球化学研究所, 贵阳 550002;
3. 中国科学院地质与地球物理研究所, 北京 100029 |
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| 基金项目： | 科技部973"深部煤炭资源赋存规律;开采地质条件与精细探测基础研究"项目课题七"深部煤岩多相地质体的地球物理响应"，国家科技重大专项"大型油气田与煤层气开发" |
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| 摘 要： | 本文将Schoenberg线性滑移裂隙介质理论应用到HTI(LSD)介质的弹性波波场数值模拟之中.主要针对描述裂隙状态的2个裂隙参数--法向弱度EN和切向弱度ET对波场的影响进行了有限元模拟.模拟结果揭示了EN主要影响快波而ET主要影响慢波的波场特征,通过EN和ET变化对应的裂隙含水程度说明了EN对裂隙中的流体敏感而E...
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| 关 键 词： | 裂隙介质 线性滑移理论 数值模拟 法向弱度 切向弱度 |
| 收稿时间： | 2010-09-04 |
The wave field characteristics of the fracture weakness parameters |
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| YANG De-Yi,WANG Yun,ZHANG Mei-Gen.The wave field characteristics of the fracture weakness parameters[J].Chinese Journal of Geophysics,2011,54(3):862-866. |
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| Authors: | YANG De-Yi WANG Yun ZHANG Mei-Gen |
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| Institution: | 1. Taiyuan University of Technology, Taiyuan 030024, China;
2. Institute of Geochemistry, CAS, Guiyang 550002, China;
3. Institute of Geology and Geophysics, Chinese Atademy of Sciences, Beijing 100029, China |
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| Abstract: | This paper applies the Schoenberg fracture media model theory to numerical simulation of elastic wave field in HTI (LSD) media. By means of the numerical simulation we revealed the wave field characteristics of the fracture parameter normal weakness EN and shear weakness ET (two dimensionless parameters). The results of the wave field simulation indicate that the parameter EN has an effect on the fast wave and the parameter ET has an effect on the slow wave. EN is very sensitive to fluid in fracture, and ET is sensitive to elastic characteristics of fracture's own. The conclusion has an important sense for the application of the Schoenberg fracture media model theory in the field of fracture prediction and fluid detection in fractures. The physics meaning of the normal weakness EN and the shear weakness ET are more definitude than the Thomsen parameters (ε,γ,δ). |
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| Keywords: | Fracture media Liner slip deformation(LSD) theory Numerical simulation Normal weakness Shear weakness |
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