走滑构造差异变形特征及其主控因素分析——基于砂箱模拟实验

发布时间：2018-03-22 17:21

本文选题：走滑断层　切入点：走滑主位移带　出处：《石油实验地质》2017年05期 　论文类型：期刊论文

【摘要】：走滑断裂及其相关构造与油气聚集分布有着密切联系。受基底性质、断层形态及地层能干性影响,走滑断层具有明显分段特征,深、浅断裂组合样式也存在明显差异。利用砂箱实验讨论基底走滑断层形态、软弱层对盖层走滑变形带的影响。模拟实验表明:基底断层走滑位移量对盖层构造变形强度、构造变形样式有明显控制作用。地层岩性、盖层厚度控制浅层走滑剪切范围及变形幅度。走滑变形带宽度与软弱层厚度成正比,断层受阻部位软弱层厚度大则形成褶皱,反之发育断块构造。基底断层走向变化导致的局部应力条件差异是走滑断裂分段及构造变形差异的重要控制因素。
[Abstract]:The strike-slip fault and its related structures are closely related to the oil and gas accumulation and distribution. There are also obvious differences in the combination styles of shallow faults. The shape of strike-slip faults of basement and the influence of weak layers on strike-slip deformation zone of caprock are discussed by using sand box experiment. The simulation results show that the displacement of strike-slip of basement faults has great influence on the deformation strength of caprock structure. The lithology of strata and the thickness of caprock control the range and amplitude of shallow-layer strike-slip shear. The width of strike-slip deformation zone is proportional to the thickness of weak layer, while the thickness of weak layer in fault block area is large, and the fold is formed. On the contrary, the difference of local stress conditions caused by the change of strike of basement fault is an important controlling factor for the difference of strike-slip fault segment and tectonic deformation.
【作者单位】：中国石油东方地球物理勘探有限责任公司;中国石油大学(北京)地球科学学院;中国石油东方地球物理勘探有限责任公司研究院地质研究中心;
【基金】：国家科技重大专项课题(2011ZX05009-001)资助
【分类号】：P618.13

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