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沉积环境不仅影响岩石的组分和结构,也决定储层物性和含油性。本文通过对五号桩洼陷沙三下亚段层序地层分析和沉积期次划分,利用单井相分析与连井相对比,理清各砂组沉积的动力学机制,明确砂组沉积特征,首次提出沙三下晚期为沙三段扇三角洲迁移性河道沉积,为构造解释和储层描述奠定坚实基础。
Sedimentary environment not only affects the rock composition and structure, but also determines reservoir properties and oil content. Based on the analysis of sequence stratigraphy and subdivision of sedimentary subfacies in sub-section Shahejie of Wulizhang Sag, using the single-well facies analysis and the contrast of continuous wells, the dynamics mechanism of each sand group is clarified, and the sedimentary characteristics of sand group It is the first time that the late third member of the Third Member of the Third Member of the Third Member of the Third Triassic was a sedimentary channel of deltaic fan migration in the third member of the Third Member of the Third Member of the Yellow River Basin, laying a solid foundation for tectonic interpretation and reservoir description.