【摘要】 分析地震、钻/测井等资料,将渤中凹陷东营组划分为2个三级层序和5个体系域.东三段和东二下亚段构成层序SQ1,东二上亚段和东一段构成层序SQ2.层序SQ1中东三段为湖扩体系域,冲积扇、辫状河三角洲及扇三角洲围绕凸起分布;东二下亚段为高位体系域,大型曲流河三角洲开始向湖盆中央进积,三角洲沉积范围明显增加,在凹陷长轴方向最为发育,超覆到石臼坨凸起及渤南低凸起上,三角洲前方滑塌浊积扇及湖底扇发育.层序SQ2的东二上亚段发育低位体系域和湖扩体系域:低位体系域是在东二下亚段沉积的基础上发育的,湖盆范围缩小,三角洲继续向凹陷中央进积;湖扩体系域的湖泊范围迅速扩大,曲流河三角洲主要分布于长轴方向,辫状河三角洲主要分布在凸起周围;东一段为高位域,湖盆面积再次迅速缩减,曲流河三角洲在凸起之间及石臼坨凸起边缘发育,辫状河三角洲普遍发育在凸起边缘.各层序凸起边缘及斜坡带三角洲前缘砂体、前方滑塌浊积扇及湖底扇是形成隐蔽油气藏的有利区带.更多还原

【Abstract】 Based on the analysis of seismic and drilling/logging et al data,Dongying formation can be divided into two third-order sequences,and five system tracts.Dong-3 member and lower Dong2 sub-member forms SQ1,upper Dong2 sub-member and Dong1 forms SQ2.SQ1 develops not only half-deep and deep lacustrine mudstone with large thickness and wide distribution,but also sandstones of meandering river deltas,alluvial fans,fan deltas,braided river deltas and sublacustrine fan facies,and is the main sequence with source-reservoir-caprock assemblage combination.The sandstones of fluvial,alluvial fans,fan deltas,braided river deltas and sublacustrine fan developed in SQ2 are available reservoirs.The delta-front sandbodies,slump turbidite fans and Sublacustrine fan which have developed the uplift margin belt and slope zone of each sequence,are the favorable exploration areas.更多还原