南黄海中生代构造演化与海相地层改造

This project is concerned with the strategic demand of the nation to obtain exploration breakthrough in Meso-Paleozoic marine strata of the South Yellow Sea, and poor understanding of the records in the South Yellow Sea of the tectonic transition from continental collision to oceanic subduction in East Asia during the Mesozoic. Based on the recent obtained high quality seismic, well data obtained and regional geological and geophysical study, unique structural styles in different evolution stages of the South Yellow Sea during Mesozoic, tectonic regime transition, spatial-temporal distribution of deformation, post-reformation caused by Mesozoic tectonics (compressional, strike-slip, extensional) , erosion and volcanism, and targeted thin shell FE (Shells) shallow and deep coupling simulation will be researched in this project. The knowledge of the Mesozoic tectonic evolution of the South Yellow Sea and its dynamic mechanism will significantly promote our understanding of the tectonic evolution of the East Asia. Reconstruction of the South Yellow Sea marine strata and the favorable preservation conditions is crucial for the petroleum and gas exploration in this region.

着眼南黄海海相中古生代油气突破战略需求，针对东亚中生代从陆-陆碰撞到洋-陆俯冲转换作用于南黄海的地质构造记录认识不清晰、研究薄弱问题，本项目拟利用近几年在南黄海新获得的高精度地震资料和钻井资料，结合区域相关地质与地球物理资料和研究成果，通过对南黄海中生代不同演化阶段独特构造样式、构造体制机制转变、构造变形的时空展布型式、中生代构造（挤压、走滑、伸展）、剥蚀、火山作用对海相地层的改造、有针对性的Shells有限元深、浅部构造耦合模拟研究等，揭示南黄海中生代构造演化过程及其动力学机制，确认海相中古生代后期改造规律，以期服务于南黄海海相油气勘探战略突破，并为完善东亚中生代构造体制转换动力学过程与机制的建立提供南黄海地区依据。

着眼南黄海海相中古生代油气突破战略需求，针对东亚中生代从陆-陆碰撞到洋-陆俯冲转换作用于南黄海的地质构造记录认识不清晰、研究薄弱问题，本项目利用近几年在南黄海新获得的高精度地震资料和钻井资料，采用平衡剖面恢复、有限元应力场数值模拟等方法手段，结合区域相关地质与地球物理资料，通过对南黄海中生代不同演化阶段独特构造样式、构造体制机制转变、构造变形的时空展布型式的识别，详细论证了南黄海中生代双向逆冲推覆构造(T3-J2)、走滑构造（J3-K1）、伸展与反转构造（K2-Q）三期构造的构造样式、平面展布形态、演化过程及其动力学机制；通过三期构造（挤压逆冲、走滑、伸展）与剥蚀、火山对海相地层改造作用分析，阐明了南黄海海相中古生代后期改造规律和残留地层分布，评价了油气保存条件，最终，指明了南黄海油气战略选区的方向与目标。.本项研究，对南黄海海相油气勘探战略突破与井位部署，东亚中生代构造体制转换的过程、方式与机制的建立都有着十分重要的意义。