Taking the low permeability reservoir of X Oilfield as the research object,the three-dimensional Digital core model is reconstructed and the pore network model is extracted for analysis by using CT scanning technology,central axis algorithm and other methods. The study shows that the reservoir pore types in this area are mainly intergranular pores,dissolution pores and microfractures. The average pore radius is 33.11μm,and the average throat radius is 1.47μm m. The small throat is the main reason for the low reservoir permeability in the study area.%以X油田低渗透储层为研究对象,应用CT扫描技术、居中轴线算法等方法重构三维数字岩心模型、提取孔隙网络模型进行分析.研究表明:该区储层孔隙类型以粒间孔、溶蚀孔和微裂缝为主,平均孔隙半径33.11μm,平均喉道半径1.47μm,喉道细小是造成研究区储层渗透率低的主要原因.
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