基于三维CT扫描图像的致密砂岩孔隙数据提取方法  

A Method of Extracting Pore Data of Tight Sandstone Based on 3D CT Scanning Image

作　　者：孙泽 SUN Ze(School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China)

机构地区：[1]华北科技学院安全工程学院,北京东燕郊065201

出　　处：《华北科技学院学报》2020年第1期6-13,共8页Journal of North China Institute of Science and Technology

基　　金：中央高校基本科研业务费资助项目(3142019040)。

摘　　要：致密砂岩孔隙类型、特征、表征参数的提取对油气赋存运移、矿井瓦斯突出以及井下涌水等机理的研究具有重要的理论意义和实践价值。随着对致密砂岩孔隙度研究的不断深入,二维空间扫描图像在实际数据计算中表现出一定的局限性,在有关孔隙度表征判断方面,人为干预辨别的成分较多,为降低人为干预对孔隙数据的提取,采用高级三维立体可视化图像处理软件Avizo对CT扫描法重建的岩心进行数字化可视化操作,更为直观地显示出孔隙大小、孔喉大小及连通方式,同时可得到孔隙度占比、基质骨架结构占比等数据的定量分布状态,研究成果可为相关领域的研究提供新的技术支撑。The extraction of pore types,characteristics and characterization parameters of tight sandstone is of great theoretical and practical significance to the study of the mechanism of oil and gas occurrence and migration,mine gas outburst and underground water gushing.With the development of research on porosity of tight sandstone,the two-dimensional spatial scanning image shows some limitations in the actual data calculation.In the judgement of porosity characterization,there is much amount of artificial intervention identification.In order to reduce the extraction of pore data by artificial intervention,the core reconstructed by CT scanning method is digitalized and visualized by using Avizo,the advanced three-dimensional visualization image processing software,it can show the pore size,pore throat size and connection mode more intuitively,and at the same time,it can get the quantitative distribution state of porosity ratio,matrix skeleton structure ratio and other data.The research results can provide new technical methods for the research in related fields.

关 键 词：Avizo 数字岩心 三维CT扫描 图像重构 

分 类 号：P618.13[天文地球—矿床学]