预测裂隙发育带的构造应力场数值模拟技术

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。

Structural stress field numerical simulation technigue for fracture zone prediction.

The deforming and fracturing of rock formation in crust are often influenced by tectonic movement and the action strength. The fracturing is closely related to the distribution of structural stress field, and the action effect of structural stress field depends on petrophysical characteristics of formation. The distributions of dominant stress and shear stress in research area of a given seismic horizon are estimated by using linear elastic finite element modeling in continuous medium. Estimation result based on the theory is closely related to the seismic data analysis and petrophysical characteristics of the formation. This technique has been used successfully to predict macro distribution of fracture zone in research area. The technique has good application prospects in hydrocarbon resources evaluation.