辽中凹陷古近系东营组高精度层序地层及沉积体系分析  

High-Resolution Sequence Stratigraphy and Depositional System Analysis of Dongying Formation,Paleogene in Liaozhong Depression

作　　者：吴伟[1,2] 林畅松[3] 周心怀[4] 董伟[2] 李全[2] 郑敬贵[4] 

机构地区：[1]河南理工大学,河南焦作454150 [2]中国地质大学能源学院,北京100083 [3]中国地质大学地学实验中心,北京100083 [4]中国海洋石油总公司天津分公司,天津300452

出　　处：《地质科技情报》2011年第1期63-70,共8页Geological Science and Technology Information

基　　金：国家重大科技专项"近海隐蔽油气藏勘探技术"(2008ZX05023-002)

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。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.

关 键 词：层序地层 沉积体系域 东营组 辽中凹陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]