基于数字岩心技术的砂岩渗透性研究  

Study on permeability of sandstone based on digital core technology

作　　者：孙润 田午子 徐生双 孙泽 SUN Run;TIAN Wuzi;XU Shengshuang;SUN Ze(School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China;Department of Equipment and Technology,Limited company of Qi Lian-shan Cement,Cheng County,742508,China)

机构地区：[1]华北科技学院安全工程学院,北京东燕郊065201 [2]成县祁连山水泥有限公司设备技术部,成县742508

出　　处：《华北科技学院学报》2020年第3期39-44,共6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：在煤矿行业内,有关砂岩渗透性的研究停留在利用试验实测层面上,如物性分析、高压压汞、核磁共振等技术,都是通过计算某种气体或液体穿过岩石样本的体积,获得岩样渗透特性。然而,在岩样整体渗透性测量方面这些方法无法实现定量化、可视化的效果。本文采用X-微米CT技术对霍州煤电Hz-3号样进行扫描,建立三维数字岩心渗流场模型,运用可视化软件Avizo的图像处理,提取出连通孔隙部分,并对该部分孔隙进行渗透性研究,模拟其渗流曲线路径。结果表明:在总孔隙中,连通孔隙的占比较少,约占总孔隙的31%;岩样渗流曲线呈现出局部层状分布,Y方向渗流曲线出现断流现象,岩样整体渗透率范围在000215~000267 mD之间,渗透性较弱。In the coal mine industry,the study of sandstone permeability is still on the level of test and measurement,such as physical property analysis,high-pressure mercury injection,nuclear magnetic resonance and other technologies,all of which calculate the volume of a certain gas or liquid passing through the rock sample to obtain the permeability of rock sample.However,these methods can not achieve quantitative and visual effect in the measurement of overall permeability of rock sample.In this paper,the x-micron CT technology is used to scan the hz-3 sample of Huozhou Coal Power Co.,Ltd.,and then a three-dimensional digital core seepage field model is established.Finally,the image processing of the visualization software avizo is used to extract the connected pore part,and the permeability of this part of the pore is studied to simulate its seepage curve path.The results show that:in the total pores,the connected pores account for about 31%of the total pores,which is a bit less;the seepage curve of rock sample shows a local layered distribution,and the y-direction seepage curve shows the phenomenon of breaking flow.The overall permeability range of rock sample is 0.00215-0.00267 md,which is relatively weak.

关 键 词：数字岩心 砂岩 渗透性 三维CT扫描 Avizo 

分 类 号：P618.13[天文地球—矿床学]