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地壳岩体的变形和裂缝系统的形成常常受到构造运动及其作用强度的影响 ,裂隙的产生同构造应力场分布密切相关 ,构造应力场的作用效果又依赖于地层的岩石物性特征。本文针对特定的地震层位使用连续介质线弹性有限元模型 ,计算了研究区内主应力和剪切应力的分布。基于这种理论的计算结果既同该地层的地震数据分析相关也与其岩石物性特征紧密联系 ,我们运用该技术较为成功地预测了研究区内裂隙发育带的宏观平面分布。因此 ,该技术在油气藏资源评价领域的应用具有良好的前景。
The deformation of the crustal rock mass and the formation of the fracture system are often influenced by the tectonic movement and its intensity of action. The generation of fractures is closely related to the distribution of tectonic stress field. The effect of tectonic stress field depends on the petrophysical characteristics of the stratum. In this paper, the elastic-plastic finite element model of continuous media is used to calculate the distribution of principal stress and shear stress in a given seismic horizon. The calculated results based on this theory are both related to the seismic data analysis of the stratum and to its petrophysical characteristics. By using this technique, we have been able to predict the macroscopic plane distribution of the fracture zone in the study area more successfully. Therefore, the application of this technology in the field of reservoir resource evaluation has a good prospect.