渤海湾盆地沧东凹陷新生代原型盆地构造演化  

Tectonic Evolution Process of Cenozoic Prototype Basin in Cangdong Sag,Bohai Bay Basin

作　　者：叶婷婷 颜照坤 李勇[2] 邵崇建[1] 王锦程 赵少泽[2] 任聪 聂舟 张代柱 颜晨雨 赵文武 龚楚雲 YE Ting-ting;YAN Zhao-kun;LI Yong;SHAO Chong-jian;WANG Jin-cheng;ZHAO Shao-ze;REN Cong;NIE Zhou;ZHANG Dai-zhu;YAN Chen-yu;ZHAO Wen-wu;GONG Chu-yun(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;Exploration Division,PetroChina Dagang Oil Field Company,Tianjin 300280,China;Southwest Oil and Gas Field Company,PetroChina,Chengdu 610041,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,南昌330013 [2]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [3]中国石油大港油田勘探事业部,天津300280 [4]中国石油西南油气田公司,成都610041

出　　处：《科学技术与工程》2023年第14期5914-5921,共8页Science Technology and Engineering

基　　金：中国石油大港油田分公司产学研项目(DGYT-2018-JS-289);油气藏地质及开发工程国家重点实验室开放基金(PLC201604)。

摘　　要：基于沧东凹陷地震剖面和新生代残留盆地结构的详细分析,利用平衡剖面技术,结合沉积体系演变特征,系统研究了沧东凹陷的原型盆地构造演化过程。结果表明沧东凹陷新生代经历了坳陷期(孔三段-孔一下亚段沉积期)、断陷期(孔一上亚段-东营组沉积期)和坳陷期(馆陶组-平原组沉积期)3个演化阶段。在断陷期,盆地演化主要受沧东和徐西两条边界断层的控制,盆地伸展作用具有逐渐减弱的特点,并且边界断层伸展作用具有自北西向南东迁移的特点。沧东凹陷新生代的构造演化受控于岩石圈上部简单剪切伸展和岩石圈下部纯剪切伸展的共同作用。Based on the detailed analysis of the seismic profile and the structure of Cenozoic residual basin,the structural evolution process of the prototype basin of Cangdong Sag was systematically studied by using the balanced section technology and combined with the evolution characteristics of the sedimentary system.The results show that the Cenozoic Cangdong Sag experienced three evolution stages:depression period(Ek 3-Ek 1x sedimentary period),rift period(Ek 1s-Ed sedimentary period)and depression period(Nd-Qp sedimentary period).During the rift period,the basin evolution was mainly controlled by Cangdong and Xuxi fault,the extension of the basin was gradually weakened,and the extension of the boundary fault migrated from northwest to southeast.The Cenozoic tectonic evolution of Cangdong Sag is controlled by the joint action of simple shear extension in the upper lithosphere and pure shear extension in the lower lithosphere.

关 键 词：平衡剖面 沧东凹陷 盆地演化 伸展作用 原型盆地 

分 类 号：P548[天文地球—构造地质学]