不同温度下砂岩渗透性能的核磁共振响应  

NMR Response of Permeability of Sandstone Subject to Different Temperatures

作　　者：邵继喜 胡耀青[3] 刘志军 靳佩桦 SHAO Jixi;HU Yaoqing;LIU Zhijun;JIN Peihua(Guangzhou Institute of Building Science Co.Ltd,Guangzhou Municipal Engineering Testing Co.Ltd,Guangzhou 510520,China;School of Civil Engineering&Transportation,South China University of Technology,Guangzhou 510641;Mining Technology Institute,Taiyuan University of Technology,Taiyuan 030024,China;School of Mining Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)

机构地区：[1]广州市建筑科学研究院有限公司广州市市政工程试验检测有限公司,广州510520 [2]华南理工大学土木与交通学院,广州510641 [3]太原理工大学采矿工艺研究所,太原030024 [4]黑龙江科技大学矿业工程学院,哈尔滨150022

出　　处：《太原理工大学学报》2020年第4期604-609,共6页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51574173)。

摘　　要：温度作用下研究岩石渗透性能对高温岩体工程建设具有重要意义。本文选取砂岩为研究对象,基于低场核磁共振在研究孔隙流体中无损、精细、定量化表征方面的优势,采用该技术考察了25~600℃砂岩渗透率变化。利用核磁共振方法,计算砂岩核磁孔隙参数。对比分析实测渗透率与模型之间的数值关系,评估了5种核磁共振渗透率模型。研究结果表明:SDR核磁渗透率模型可有效表征渗透率与温度的关系。不同温度下砂岩渗透率会发生改变,渗透率存在阈值温度点,在低于400℃时渗透率缓慢变化,在400℃以后渗透率显著增加。Deeper understanding of rock permeability after high temperature treatment is of great significance to the construction of high temperature rock mass engineering.Sandstone was used as research object.With the advantage of low-field NMR in non-destructive,precise and quantitative characterization of pore fluid,we investigated the change of sandstone permeability at temperature range of 25-600℃.Based on the NMR method,the NMR pore parameters of sandstone were calculated.The numerical relationship between measured permeability and model permeability was comparatively analyzed,and five NMR permeability models were evaluated.The results showed that the SDR model can be used to characterize the relationship between sandstone permeability and temperature.Sandstone permeability changes with temperature,and there exists a threshold temperature.The sandstone permeability changes slowly below 400℃,and increases significantly after 400℃.

关 键 词：温度 核磁共振 渗透性能 砂岩 渗透率模型 

分 类 号：TD823.253[矿业工程—煤矿开采]