【摘要】 东营凹陷古近系沙四上亚段发育的滩坝沉积主要有砾质滩坝、砂质滩坝和碳酸盐岩滩坝。滩坝的形成与物源存在一定的关系,这种关系主要受物源类型、物源供应强度及水动力等的综合影响。东营凹陷各地区滩坝的宏观分布特征与微观沉积特征存在明显差异。在详细分析沉积特征的基础上,认为东营凹陷主要存在基岩—滩坝沉积体系、正常三角洲—滩坝沉积体系、扇三角洲—滩坝沉积体系和碳酸盐岩滩坝沉积体系,并建立了相应的沉积模式,为该区油气勘探提供了指导。更多还原

【Abstract】 The upper part of the fourth member of the Shahejie Formation in the Dongying Sag consists mainly of gravelly beach bar,sandy beach bar and carbonate beach bar.The present paper proposed that the formation of these beach bars showed a certain correlation with their sources,which was mainly influenced by combination of source type,source supply,hydrodynamic conditions and so on.There existed a significant difference in characteristics between the macro-distribution and the micro-deposition of beach bars in various regions of the Dongying Sag.Based on the detailed analysis of sedimentary characteristics,the paper divided beach bars of the upper part of the fourth member of the Shahejie Formation into several sedimentary systems,such as bedrock-beach bar,normal delta-beach bar,fan delta-beach bar and carbonate-beach bar.Consequently,the corresponding sedimentary patterns were established in order to provide guidance for oil and gas exploration in the Dongying Sag.更多还原