【摘要】 英买力低凸起位于塔北隆起西部,是重要的含油气区域。英买2号背斜的研究与认识对于揭示区域构造演化及南部多个内幕型碳酸盐岩背斜的成因机制具有重要意义。本文运用断层相关褶皱原理及平衡剖面等方法,对英买2号背斜的地震剖面进行解释及复原。研究表明,英买2号背斜为固定翼长的滑脱褶皱,滑脱面位于中寒武统下部塑性层中,背斜演化经历了宽缓斜坡、起伏南倾、构造逆冲、稳定沉降掩埋和调整改造等5个阶段。背斜开始隆升时间为奥陶纪末期,地层缩短量为400~700 m,在海西末期隆升后遭受严重剥蚀,后期发育具传播性质的断层,伴有2期生长构造发育,背斜的前翼发生翼部旋转,发育生长三角,后翼有上超现象,体现了不同时期沉积速率的变化,也反映了后期构造活动的阶段性与持续性。更多还原

【Abstract】 Yingmaili low uplift is very important oil and gas exploration area.Our research results contribute to understanding the tectonic evolution process in this area and the formation mechanism of several carbonate uplifts in the southern.In this paper,the fine interpretations of seismic profiles and section reconstruction in Yingmai 2 work district have been accomplished with the application of fault-related folding geometry principles and balanced section technique.Studies show that Yingmai 2 anticline is a detachment fold,the limb length of which keeps constant when the anticline is growing.The evolution process of anticline can be summarized as 5 stages:flat envelope gradient;slopes northward;tectonic thrusting;settlement developing;adjustment and reconstruction.The uplifting process began in Late Ordovician and the stratawere shortened between 400 ~ 700 meters,the detachment surface of anticline lies in the bottom of Middle Cambrian series.Uplifted and denuded in the Late Hercynian Epoch,the anticline had been thrusted by the fault,which controlled the multi-stage growth strata.The flank of anticline growth strata has the character of limb rotation and the other has the character of onlap,which shows that the anticline had experienced different sedimentary rates and sustained tectonic activities.更多还原