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通过采用X射线衍射技术、扫描电镜技术的方法,分析巢湖地区龙潭组泥页岩有机碳含量、矿物组成及微孔隙等特征。结果表明,龙潭组储层的有机碳质、石英、碳酸盐矿物、黏土矿物的平均质量分数较高,同时含有一定量的黄铁矿;龙潭组的泥页岩孔隙结构分成2类:第一类为矿物质孔;第二类为有机质孔;孔隙率分布变化程度不大;孔喉半径大。通过与美国福特沃斯盆地的Barnett页岩对比,认为该地区泥页岩具有良好的页岩气储层特征;
By using X-ray diffraction and scanning electron microscopy, the organic carbon content, mineral composition and microporosity of shale in the Longtan Formation in the Chaohu area were analyzed. The results show that the average mass fraction of organic carbon, quartz, carbonate minerals and clay minerals in the Longtan Formation is high and contains a certain amount of pyrite. The pore structure of the shale in the Longtan Formation is divided into two types: One for the mineral hole; the second is organic pores; porosity distribution changes are not large; pore throat radius. By comparing with the Barnett shale in the Fort Worth Basin of the United States, the shale in this area is considered to have good shale gas reservoir characteristics.