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在区域地质背景分析的基础上,根据露头、钻井、地震资料建立了柴达木盆地芒崖坳陷中心新的构造样式:新生代早期以挤压叠瓦逆冲为主,走滑调节为辅,形成深部基底卷入型断层及相关挤压逆冲断块和挤压褶皱;新生代晚期以走滑调节为主,挤压逆冲为辅,形成浅层滑脱断层-褶皱组合,并最终定型。在构造样式确立的基础上,通过构造几何学、运动学分析,对芒崖坳陷中心地区新生代构造应力场变迁、构造层变形机制进行详尽的阐述,重塑了新生代以来该地区的构造演化历史。根据构造裂缝发育规律,指出新生代2次构造旋回的张性应力集中区,有利于裂缝储集层的发育,是下一步油气勘探的重点区带。
Based on the analysis of regional geological background, a new tectonic style of the Manya depression in the Qaidam Basin was established based on outcrops, drilling and seismic data. , Forming deep basal involvement faults and related thrust thrust blocks and crustal folds; the late Cenozoic is dominated by strike slip, supplemented by extrusion thrusting, forming a shallow slip-fault-fold combination and finally finalizing . Based on the establishment of tectonic styles, through structural and kinematic analyzes, the structural stress field changes in the Cenozoic in the central part of the Manya depression and the deformation mechanism of the tectonic deformation layer are elaborated, and the structure of the area since the Cenozoic was remolded Evolutionary history. According to the regularity of tectonic fracture development, it is pointed out that the Cenozoic secondary tectonic gyration stress concentration zone is favorable for the development of fractured reservoirs, which is the key zone for the next oil and gas exploration.