裂隙等效介质模型对煤层裂隙参数的影响

刘东洋; 师素珍; 赵太郎

裂隙等效介质模型对煤层裂隙参数的影响

煤炭资源与安全开采国家重点实验室,北京100083

基金项目: 国家重点研发计划课题(2016YFC0501102);国家科技重大专项课题(2016ZX05066-001);国家自然科学基金煤炭联合项目(U1261203);山西自然科学基金项目(2013012001)

详细信息

作者简介:
刘东洋(1993—),男,河南邓州人,硕士研究生,从事地震资料解释的研究。

中图分类号: P631
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出版历程
- 收稿日期: 2016-07-13
- 刊出日期: 2017-02-15

The influence of fracture effective model to the parameters of coal fracture

State Key Laboratory of Coal Resources and Safe Mining,Beijing 100083,China

摘要

摘要: 本文整理分析了Hudson一阶模型、Hudson二阶模型、Cheng模型、Liu模型、Schoenberg线性滑动模型等五种裂隙等效模型的弹性参数表达式。利用数值模拟的方法,分析了裂隙的纵横波速度、弹性参数随裂隙密度、方位角和孔隙填充性质的变化规律,得出了Hudson一阶模型、Hudson二阶模型和Cheng模型的适用条件与适用范围,以及Liu模型与Schoenberg模型的差异性。模拟结果表明:在裂隙密度小于0.05时,Hudson一阶模型和Hudson二阶模型都是有效的;在裂隙密度小于0.1时,Hudson二阶近似的相应特征与Cheng模型相同;在裂隙密度大于0.15以后,Hudson二阶近似开始出现无意义的发散;Liu模型和Cheng模型适用于裂隙密度小于等于0.3的介质。相对而言,Liu模型的适应性更好;Schoenberg线性滑动模型对于含水裂隙的反应最为敏感。
- 裂隙 /
- 等效介质模型 /
- 裂隙密度 /
- 纵横波速度 /
- 弹性参数
Abstract: In this paper,the first order model,the Elastic parameter expression of the two order model,the Cheng model,the Liu model,the Schoenberg model and the Hudson linear sliding model are analyzed.Using the numerical simulation method,the authors analyzed velocities of compressional and shear waves,the variations of elastic stiffness modulus respect to the fracture density,the azimuth angle and the fluid properties filled in the pore.The applicable conditions and range of Hudson first order,two order model and Cheng model are compared and analyzed.The difference between Liu model and Schoenberg model is analyzed,too.The simulation results show that the first order and the two order are valid when the fracture density is less than 0.05,and the corresponding features of the Hudson two order approximation are the same as the Cheng model when the fracture density is less than 0.1.But after the crack density is greater than 0.15,the Hudson two order approximation begins to appear divergence in the non-significant.The Liu model and Cheng model are suitable for the medium with less than 0.3 of the fracture density,and the Liu model is better.The Schoenberg linear sliding model is most sensitive to the water saturated fracture.
- fracture /
- fracture effective model /
- fracture density /
- longitudinal and transverse wave velocity /
- elastic parameter

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参考文献(26)

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裂隙等效介质模型对煤层裂隙参数的影响

作者简介:
刘东洋(1993—),男,河南邓州人,硕士研究生,从事地震资料解释的研究。

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The influence of fracture effective model to the parameters of coal fracture

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裂隙等效介质模型对煤层裂隙参数的影响

作者简介: 刘东洋(1993—),男,河南邓州人,硕士研究生,从事地震资料解释的研究。

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The influence of fracture effective model to the parameters of coal fracture

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出版历程

目录

作者简介:
刘东洋(1993—),男,河南邓州人,硕士研究生,从事地震资料解释的研究。