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    杨勇强, 邱隆伟, 南金浩. 东营凹陷沙河街组四段下亚段层序地层特征与沉积模式[J]. 中国地质, 2011, 38(1): 33-42.
    引用本文: 杨勇强, 邱隆伟, 南金浩. 东营凹陷沙河街组四段下亚段层序地层特征与沉积模式[J]. 中国地质, 2011, 38(1): 33-42.
    YANG Yong-qiang, QIU Long-wei, NAN Jin-hao. Sequence stratigraphy characteristics and sedimentary model of Lower Es4 on the south slope of Dongying Depression[J]. GEOLOGY IN CHINA, 2011, 38(1): 33-42.
    Citation: YANG Yong-qiang, QIU Long-wei, NAN Jin-hao. Sequence stratigraphy characteristics and sedimentary model of Lower Es4 on the south slope of Dongying Depression[J]. GEOLOGY IN CHINA, 2011, 38(1): 33-42.

    东营凹陷沙河街组四段下亚段层序地层特征与沉积模式

    Sequence stratigraphy characteristics and sedimentary model of Lower Es4 on the south slope of Dongying Depression

    • 摘要: 提要:近年来东营凹陷南坡沙四下亚段逐渐成为重点勘探目标。由于地层的特殊性,针对研究区层序地层与砂体成因等问题的研究相对薄弱。本次研究采用V-C地层分析法,通过钻井、测井、地震、古生物等资料,将沙四下亚段划分为2个四级层序,根据地层呈叠加样式,将每个层序划分为两个中期旋回。在连井剖面层序对比的基础上建立了研究区沙四段下亚段层序地层格架,受石村断层强烈翘倾的影响,南坡东部地区沙四下顶部大面积剥蚀。该时期主要发育冲积扇和咸水湖等主要相类型,本文首次系统分析了东营凹陷南坡沙四段下亚段沉积相的演化与分布规律,建立了沙四段下亚段的沉积模式,这对于指导研究区的油气勘探具有重要意义。

       

      Abstract: Abstract:In recent years, the south slope of Dongying Depression has become the focus of the exploration target. Due to its special stratigraphic formation, the study of sequence stratigraphy and sand origin of the study area is relatively weak. Using V-C formation analysis, the authors have divided the study area into two sequences on the basis of sequence boundaries,well logging curve, seismic reflective characteristics and palaeontological features. The sequence can be subdivided into two mid-cycles according to the stacking patterns of stratigraphy as well as changes of lithology and lithofacies. The sequence stratigraphic correlation in well-tied sections makes it possible to construct the regional stratigraphic framework. Due to the tilting of Shicun fault, the eastern part of the study area has been denuded. Alluvial fan and saltwater lake are developed in the study area. The evolution and distribution of sedimentary faces of lower Es4 on the south slope of Dongying depression is analyzed for the first time in this paper, and the sedimentary model is established. These research results have great significance in search for subtle traps in this depression.

       

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