沾化凹陷桩西地区沙二上亚段滩坝沉积规律及控制因素研究

随着我国油气勘探领域的不断深入，滩坝沉积体系已经成为我国陆相含油气盆地中的又一有利储层，其中滩坝沉积分布规律和影响因素是研究重点和难点。以高分辨率层序地层学理论为指导，通过岩心、录井和测井分析，对沾化凹陷沙二上亚段进行划分和对比。在识别和划分不同沉积相的基础上，着重对碎屑岩滩坝和生物滩进行精细研究，分析得出以下规律:①生物滩和砂滩分布于平坦、开阔环境中，单层厚度薄，分布面积广；②砂坝形成于有一定坡度和地形起伏的环境中，单层厚度大，分布局限。③潜山台地周缘滩坝沉积的主控因素为古地貌和基准面升降旋回。同时油气显示表明桩西潜山周围滩坝具有良好的储集性能和油气资源前景。

Beach-Bar Depositional Laws and Controls of the 2nd Member of Shahejie Formation in Zhuangxi Area, Zhanhua Sag

With the improvement of our national oil/gas exploration,beach-bar depositional system has become another kind of favorable reservoir in the continental petroliferous basins,and depositional laws and influential factors are its emphasis and difficulties.This paper,based on high-resolution sequence stratigraphy theory,though the analyzing of core,well log,logging curves,divides and correlates strata in the 2nd member of Shahejie Formation.On the basis of identifying and classifying different kinds of sedimen...