| 岩石应力各向异性形成机理的试验研究 |
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| 引用本文： | 张正茂,彭小佳. 岩石应力各向异性形成机理的试验研究[J]. 石油天然气学报, 2008, 30(6) |
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| 作者姓名： | 张正茂 彭小佳 |
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| 作者单位： | 中国石油大学(北京)深层岩石力学实验室，江汉油田分公司江汉采油厂 |
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| 摘 要： | 岩石的各向异性可以分为应力各向异性和材料各向异性两种,通常用声波速度在各个不同传播方向上的差异来表示岩体的各向异性。正确地认识岩石的应力各向异性形成机理对于计算各项岩石参数、分离应力各向异性和材料各向异性都有重要的意义。通过声波试验指出,岩石的应力各向异性是由于岩石内的孔隙形变引起的,并发现岩石的应力各向异性系数会随着应力增加而出现波动且波动幅度越来越小。
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| 关 键 词： | 岩石 各向异性 形成机理 声波速度 试验研究 |
Experimental Study on Forming Mechanism of Rock Stress Anisotropy |
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| ZHANG Zheng-mao. Experimental Study on Forming Mechanism of Rock Stress Anisotropy[J]. Journal of Oil and Gas Technology, 2008, 30(6) |
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| Authors: | ZHANG Zheng-mao |
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| Abstract: | Rock anisotropy could be divided into stress anisotropy and material anisotropy. The difference of aciustic velocity in different directions wes used to the anisotropy of rocks. Correct recognition of the forming mechanism of rock anisotropy was of great significance for calculating rock parameters, separated stress anisotropy and material anisotropy. It is pointed in acoustic test that rock stress anisotropy is caused by porosity deformation, it is also found that the anisotropy is surged with stress increase and surging amplitude is less and less. |
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| Keywords: | rock anisotropy forming mechanism acoustic velocity experimental study |
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