基于微观分形技术对矿区砂岩渗透参数估计研究  

Estimation of sandstone permeability parameter in mining area based on microscopic fractal technology

作　　者：徐斌[1,2] 董书宁 徐艳玲 XU Bin;DONG Shu-ning;XU Yan-ling(College of Geoseienee and Surveying Engineering, China University of Mining and Technology （Beijing） , Beijing 100083, China;China Coal Research Institute, Xi＇an Research Institute, Xi＇an 710054, China;Logistic Engineering University of PLA, Chongqing 401311, China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]煤炭科学研究总院西安研究院,陕西西安710054 [3]中国人民解放军后勤工程学院,重庆401311

出　　处：《煤炭工程》2018年第2期109-112,共4页Coal Engineering

基　　金：国家自然科学基金资助项目(51074075;41072188);中国人民解放军后勤工程学院青年科研基金(YQ16-420502);国家重点研发计划重点专项(2017YFC0804102)

摘　　要：为了获取较为准确的渗透参数,依据砂岩孔隙介质的微观分形理论,在不等径毛束管孔喉模型基础之上建立起渗透性参数与砂岩微观结构参数的函数关系;为了获取砂岩微观孔隙的相关参数,通过扫描电镜技术对砂岩样本进行扫描,并运用Imagepro plus专业图像软件对SEM图像进行统计分析;为了检验所选理论的准确性以及专业图像软件的可靠性,对唐山林南仓矿钻孔含煤区段砂岩岩芯进行取样研究,运用所选理论计算出样品的渗透率理论值以及通过室内实验测得样品的宏观渗透率,将理论值与实测值对比分析,结果表明,二者误差较小,充分验证了理论以及处理技术具有较好可靠性。In order to estimate the permeability of a sandstone,an important hydrogeological parameter,a mathematical model between the macroscopic permeability and pore fractal dimension was created based on fractal theory and unequal capillary columns model. In order to obtain microcosmic parameters of a sandstone,scanning election microscope and Imagepro Plus software were also used to get SEM image and calculate their theoretical values. To test the accuracy of the selected theory and the reliability of the professional image software,some sandstone samples were taken from a borehole in a coal mine in Tangshan,theoretical values of these samples were calculated by using the selected equations,and the macro permeability of samples was obtaind using laboratory equipment. According to comparison between theoretical and measured value,the error is small and the selected methods and built models are reasonable.

关 键 词：微观分形技术 砂岩含水层 渗透率 电镜扫描 

分 类 号：TD12[矿业工程—矿山地质测量]