【摘要】 以地震资料、测井、录井资料为主,结合孢粉化石等地质资料,将辽中凹陷东营组地层划分为3个三级层序,并划分了沉积体系域,根据易于识别和追踪的水退浊积扇底界面划分四级层序,将东营组划分为7个四级层序。通过岩心观察及对测井、地震特征的对比,在层序内部识别出浊积扇、近岸水下扇、扇三角洲、辫状河三角洲、曲流河三角洲、滨浅湖-滩坝等多种沉积体系,分析认为地层层序、物源供给、断裂坡折、湖平面变化、构造活动等因素控制了沉积体系的发育。更多还原

【Abstract】 Based on seismic,logging,drilling,palynology,micropalaeontology an d other geologic information,the strata of Dongying Formation in Liaozhong Depr ession is divided into 3 3rd-order strata sequences which system tract is divide d accurately.Dongying Formation is divided into 7 4th-order strata sequences by means of regression turbidite fan basal interface which is traced readily.Base d on identifying the core,log curve and seismic feature,all kinds of depositio nal system,such as sublacustrine fan,subsea apron,fan delta,braided channel delta,meandering river delta,beach-bar etc,are identified.It is concluded th at depositional system is dominated by strata sequence,sedimentary derivation, denivellation,break of slope and tectonic movement.更多还原