数字岩心多分辨率存储及连通区域分析

Multi-resolution Storage of Digital Core and Analysis of Connected Area

为解决数字岩心文件因数据量大而导致存储空间狭窄和访问效率低下的问题,以及分析岩心孔隙的连通区域并管理其性质,通过四叉树和八叉树分块方法对数字岩心进行分布式多级分辨率存取,通过扫描线、三角剖分、四面体剖分和地图染色方法识别和划分连通区域,基于移动立方体算法求取连通区域边界面。结果表明:生成的多分辨率岩心数据根据浏览范围选择粒度层级,减少了数据读取量并提升了临近区域数据获取速度;分色划分连通区域展现了数字岩心的连通性质,并建立了三维模型实现对孔喉结构形态的分析。该研究结果为数字岩心的高效存取、连通性分析及孔喉结构建模提供了方法支持。

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 was accessed with distributed multi-level resolution through the quadtree and octree block method, and the connected area was identified and divided through the scanning line, triangulation, tetrahedron partition and map coloring methods. The edge interface of the connected region was 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.