鄂尔多斯盆地低渗透储层微观结构特征研究

Study on micro-structure of tight sandstone reservoir in Ordos Basin

致密砂岩储层微观结构研究是储层研究的重要环节,通过薄片、扫描电镜和高压压汞等试验分析,评价志丹油田MT区长6油层组致密岩心的微观孔隙结构特征。砂岩测试分析结果显示,样品充注模拟实验结果显示,长6油层组以细粒长石砂岩为主,胶结程度复杂;长石溶孔和碳酸盐岩溶孔较为发育,中等喉道使孔喉连通性相对较好。

The microstructure research of tight sandstone reservoirs is an important part of reservoir research.Through thin section,scanning electron microscope and high pressure mercury injection experiments,the microscopic pore structure characteristics of tight cores of Chang6 oil-bearing formation in MT block of Zhidan Oilfield were evaluated.The sandstone test and analysis results show that the sample charging simulation results show that the Chang6 oil-bearing formation is dominated by fine-grained feldspar sandstone with complex cementation;Connectivity is relatively good.