对营城组岩石样品进行微观特征及粒度特征研究,识别出储层沉积微相类型有扇三角洲前缘亚相的水下分流河道、河口坝、远砂坝和浅湖-半深湖亚相的水下扇与浊流等5种微相.结合储层物性测试资料,发现砂体成因类型对储层的物性有明显的控制作用.扇三角洲前缘河口坝和水下分流河道砂体储集物性最好,水下扇砂体储层孔渗条件较河口坝和水下河道稍差,远砂坝和浊流储层物性均较差.同时,该区储层物性还受成岩作用的控制.%Studying the microscopic and particle characteristics of Yingcheng Formation reservior in Shiwu oilfield, the authors identify five microfacies in this area which contain submerged distributary channel, branching mouth bar, distal bar of fan delta front subfacies and subaqueous fan, turbidity current of shallow to semi-deep lake subfacies. Combined with the reservior property data, it is revealed that sand genetic types evidently controlled the reservoir physical property. The branching mouth bar and submerged distributary channel of fan delta front are the best in sand reservoir quality, the subaqueous fan is slightly inferior, while the distal bar and turbidity current are the worst. The reservoir physical property in this area is also controlled by diagenesis.
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