摘要
利用平衡地质剖面技术和2D Move软件对鄂尔多斯盆地西缘中南段骨架地震剖面进行了精细解释。重新厘定9条一级断裂,确定4个一级构造单元,依据地质结构与构造样式的不同,将西缘中南段划分为5个段。构造变形自西向东依次减弱,南北向中部马家滩段以薄皮构造为主,其余段以厚皮构造为主;西缘中南段不同地区最短收缩量不同,甜水堡段最短收缩量达50.62%,其构造变形主要发生于侏罗纪末期,最终定型于新生代。可见,西缘中南段具有"东西分带、南北分段"的典型特点,构造圈闭与油气聚集关系密切。
Main seismic sections in the west margin of the Ordos Basin are explained,depend on balanced section technology and 2D Move software.Nine first-level faults and four first-level structure units are confirmed,and the west margin of the Ordos Basin is divided into five sections.The structure distortion is stronger in the east than in the west.Majiatan section is thin-skinned structure,but the others are thick-skinned tectonics.The shortest compressed measure is different in different areas.Tianshuibu section’s shortest compressed measure is up to 50.62%.Structure distortion came into being in Late Jurassic（146-135 Ma） mostly,ended in Cenozoic.Structure trap types are multiplex,which can supply a certain amount of space for the accumulation of oil and gas.Their forming matches with the period of accumulation of oil and gas.The structure character of the west margin of the Ordos Basin is different from east to west or from north to south.The relationship between the structure trap and accumulation of oil and gas is close.
出处
《现代地质》
CAS
CSCD
北大核心
2012年第4期691-695,共5页
Geoscience
基金
陕西省教育厅专项科研计划项目(09JK567)
西安科技大学博士启动金项目(2008QDJ016)
关键词
鄂尔多斯盆地西缘中南段
平衡剖面技术
构造特征
地质结构
构造演化
the mid-south section at the west margin of the Ordos Basin
balanced section technology
struc-tural character
geological structure
structural evolution
