渤中凹陷古近系构造层序研究  

A study on Paleogene tectonic sequences in Bozhong sag

作　　者：周士科[1] 魏泽典 邓宏文[1] 王洪亮[1] 谢武仁[1] 杨孝[1] 

机构地区：[1]中国地质大学(北京) [2]中海石油(中国)有限公司天津分公司

出　　处：《中国海上油气（工程）》2006年第4期236-240,254,共6页China Offshore Oil and Gas

基　　金：国家"十五"重大科技攻关项目"中国大中型油田勘探开发关键技术研究"下属课题"渤海下第三系油气勘探地质评价技术(课题编号:2003BA613A05)部分研究成果

摘　　要：根据构造发育史和沉积特征,渤中凹陷古近系可划分为3个二级层序及9个三级层序。二级层序界面为区域不整合面,三级层序界面在凹陷不同部位分别为局部不整合面、顶超面、下超面和沉积作用转换面。根据边界断层和古地貌特征,渤中凹陷斜坡带层序构型分为陡坡型、缓坡型、断阶型,分别发育不同的沉积体系。构造演化阶段性、边界断层、斜坡带古地貌是控制渤中凹陷古近系沉积体系和层序构型的主要因素。In Bozhong sag, Paleogene strata can be divided into three 2nd-order sequences and nine 3rd-order sequences on a basis of its tectonic history and sedimentation. The boundaries of 2nd-order sequences are regional unconformities, while the boundaries of 3rd-order sequences may be local unconformities, toplaps, downlaps or transform faces of sedimentation in various areas in the sag. According to the boundary faults and palaeogeomorphology of the sag, the sequence configuration in its slope zone can be divided into steep-slope type, mild-slope type and faulted terrace type, which may develop different sedimentary systems. The tectonic stages, boundary faults and palaeogeomorphology in the slope zone are the main factors to control paleogene sedimentary systems and sequence configurations in Bozhong sag.

关 键 词：渤中凹陷 古近系 构造层序 沉积体系 层序构型 

分 类 号：P544.4[天文地球—构造地质学]