论文部分内容阅读
焉耆盆地经历的燕山期和喜山期构造运动造成盆地沉积盖层构造变形和地层的剥蚀。通过对盆地南缘库鲁克塔格推覆体的构造特征、盆内盖层构造样式和展布规律以及平衡剖面的分析,认为燕山期推覆体由南向北推覆形成了南缘推覆体及山前逆冲带、盆地南部滑脱拆离带、北部走滑调整应变带的格局,且燕山期的挤压变形及相应的推覆作用相对较大,为主要挤压缩短变形期,而喜山期挤压缩短变形相对较弱;在燕山期构造与燕山晚期早中侏罗统主要烃源岩生、排烃高峰期有效的配置下,以挤压、拆离滑脱和走滑控制下的局部构造样式和控油组合对油气的勘探有重要的指导意义。
The Yanshanian and Himalayan tectonic movements experienced by the Yanqi Basin resulted in structural deformation of the sedimentary cap rocks and denudation of the strata. Based on the tectonic characteristics of the Kuruktag nappe in the southern margin of the basin, the structural styles and distribution patterns of the Cambrian caprock, and the analysis of the balance profile, it is considered that the thrust of the Yanshanian nappe formed a south margin thrusting from south to north Overburden and piedmont thrust belt, the southern part of the basin slid and detachment belt, the northern part of the slip zone adjusts the strain zone pattern, and the Yanshanian extrusion deformation and the corresponding nappe action are relatively large, which is the main compression and shortening deformation period, While the compression and shortening deformation during the Himalayan period was relatively weaker. Under the effective configuration of the Yanshanian structure and early Yanshanian early Middle Jurassic major hydrocarbon source rocks and peak hydrocarbon expulsion, under the control of extrusion, detachment, and strike-slip The local tectonic pattern and oil control combination have an important guiding significance for oil and gas exploration.