Abstract:To solve the problems of narrow storage space and low access efficiency caused by the large amount of data in the digital core file, and analyze the connected area of the core pores and manage its properties, the digital core is accessed with distributed multi-level resolution through the quadtree and octree block method, and the connected area is identified and divided through the scanning line, triangulation, tetrahedron partition and map coloring methods, The edge interface of the connected region is obtained based on the moving cube algorithm. The results show that the generated multi-resolution core data selects the granularity level according to the browsing range, which reduces the amount of data reading and improves the speed of data acquisition in adjacent areas; The color separation division of the connected area shows the connected nature of the digital core, and a three-dimensional model is established to analyze the pore throat structure. The research results provide method support for efficient access, connectivity analysis and pore throat structure modeling of digital cores.