沙三下亚段扇三角洲沉积特征分析--以五号桩洼陷为例

Analysis of the fan delta sedimentary characteristics at the lower of Es3: A case history of Wuhaozhuang Sag

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。

The depositional environment not only affects the component and structure of rock, but also determinesreservoir properties and oilliness as well. Through the analysis of the sequence stratigraphy and division of thesedimentation stage, the sedimentation dynamic mechanisms were classified and sedimentation characteristics weredetermined for the lower of Es3 of Wuhaozhuang Sag based on single well phase analysis and connected well phasecorrelation. It was first provided that the sedimentation during the later of the lower of Es3 is the fan deltatransported channel sedimentation, which provided the theoretical basis for the structure interpretation andreservoir description.