塔里木盆地玉北构造带断层特征及其裂缝分析  

The study of fratures and the characteristics of Yubei structural belts, Tarim Basin

作　　者：鲁人齐[1,2] 刘波[2] 何登发[3] 张学丰[2] 黄臣军[2] 刘格云[3] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]北京大学地球与空间科学学院,北京100871 [3]中国地质大学(北京),北京100083

出　　处：《地质科学》2016年第2期460-469,共10页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家科技部重大专项专题（编号：201IZX05005-003-010HZ）、国家自然科学基金青年基金项目（编号：41202142）和中国地震局地质研究所基本科研业务专项（编号：IGCEA1422）资助.

摘　　要：塔里木盆地玉北构造带形成于加里东中晚期，主要断裂以挤压逆冲为主，早期形成断层传播褶皱样式，断层总体终止于石炭系／奥陶系不整合面之下。该地区奥陶系碳酸盐岩储层易发育断层伴生裂缝和褶皱调节性裂缝，主要分布在膝褶带和断层传播褶皱区。海西晚期玉北地区断裂重新活动，仍以挤压为主形成三角剪切样式，但断层位移量并不大，该时期玉北构造带基本定型，储层裂缝易发育在三角剪切变形区。喜马拉雅期玉北地区存在微弱构造变形，玉北构造带主要受到构造的叠加改造。新生代青藏高原向东的扩张产生北东-南西向的构造应力场，使得北东-南西向的玉北断裂带具有开启性，对玉北地区油气调整和聚集会有一定的影响。The Yubei structural belts in Tarim Basin were occurring during the Mid-Late Caledonian movement. The major faults were thrusting and forming fault propagation folds. Most of these thrusts were not cut the unconformity layers between the Carboniferous and the Ordovician. The carbonate reservoirs of the Ordovician were developing the fault-related fractures and fold- accommodation fractures. These fractures were distributed at the kink bands and the fault propagation deformation areas. During the Late Hercynian movement, the Yubei thrusts were re-active and forming the trishear. The fault slipping was limited and the fractures only appeared in the trishear deformation areas. The Yubei structural belts were finally formed during the Late Permian Period and reformed during the Himalayan movement. Because of the Tibet Plateau is developing from the east to west, the Yubei areas are affected by the NE-SW tectonic stress field and have some weak deformation inner the basin. The Yubei major faults have some strike-slipping and tensile component, which may influenced the adjustment and migration of oil and gas.

关 键 词：断层传播褶皱 三角剪切 几何学和运动学 碳酸盐岩 储层裂缝 

分 类 号：P542[天文地球—构造地质学] TE122.3[天文地球—地质学]