惠民凹陷商河砂体沉积微相与成岩作用研究

惠民凹陷商河地区沙二下亚段砂体（商河砂体）是商河油田的主力产油层，然而有关该砂岩储层的成因问题长期困扰着该区的科研和生产。通过岩心观察、测井韵线分析、薄片鉴定、扫描电镜和X射线衍射分析，发现：商河砂体形成予三角洲前缘沉积环境，水下分流河道和河口坝砂体是主要砂体，也是良好的油气储集体；储集层砂岩类型为长石砂岩和岩屑长石砂岩，成岩作用主要有机械压实、自生矿物的胶结作用和溶蚀作用。研究认为，沉积微相控制了商河砂体的空间展布和碎屑物质组分，成岩作用决定了商河砂体孔陈结构特征和储层类型。

Study on Sedimentary Microfacies and Diagenesis of Shanghe Sand Bodies in Huimin Sag

Shanghe Sand Bodies(sandbodies in the lower part of the second member of Shahejie Formation in Shanghe region) are the main oil producing beds in Shanghe Oilfield.Whereas,the scientific research and production in the region has been puzzled by the genesis of the sandstone reservoirs for a long time.Based on the observation of drill core,analysis of logging curves,slice identification,analysis of scanning electron microscope and X-ray diffraction,the paper shows that Shanghe Sand Bodies deposited in delta fr...