针对南堡3号构造区中深层东营组二段(Ed2)-沙河街组三段(Es3)沉积类型认识的不统一,在研究区8口取心井岩心观察描述的基础上,结合地震、测井、录井及岩矿等资料,对南堡3号构造区中深层辫状河三角洲、扇三角洲、深水滑塌浊积扇和滨浅湖的沉积特征进行了研究.结果表明:研究区物源来自西南方向沙垒田凸起,SQ1层序和SQ2层序时期发育扇三角洲-滨浅湖沉积体系,SQ3-SQ7层序发育多期叠加的辫状河三角洲-滨浅湖/浊积沉积体系,分布范围受湖盆缓坡带构造背景控制.在此基础上,综合南堡3号构造区构造活动特征、湖盆边界形态、水体深度等因素,从典型地震剖面出发,建立了南堡3号构造区中深层坡折带控制的层序沉积充填模式,旨在对类似地区的油气勘探有所裨益.%Consensus has not been reached on the types of sedimentary facies in the third member of the Shahejie Formation to the first member of the Dongying Formation in No.3 Structure,Nanpu depression. Based on observation and description of cores from 8 wells and in combination with seismic data,logging data,and rock-mineral determination,this paper systematically studied fan delta depositional,braided delta depositional,shore-shallow lacustrine sediment and slump turbidite fan depositional in the medium-deep strata in No.3 Structure of Nanpu depression. It is pointed out that the provenance is from the southwest of Shaleitian Salient in the study area;the fan delta and shore-shallow lacustrine sediment are mainly in SQ1 and SQ2;the braided delta and shore-shallow lacustrine or slump turbidite fan depositional are mainly in SQ3-SQ7. On the basis of identifying the sedimentary facies,through analyzed the synsedimentary tectonic activity,the geometry of boundary fault,water depth and typical seismic section, the evolution and distribution characteristics of the main sedimentary facies in different periods has been determined. Based on these studies,this paper puts forward a sedimentary evolution model under the successive controls of slope belt of the medium-deep strata in No.3 Structure,Nanpu depression,offering an applicable instruction for oil and gas exploration in similar areas.
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