辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(6)：624-629,6.DOI:10.11956/j.issn.1008-0562.2017.06.012
砂岩微观孔隙分形特征与宏观渗透性能的相关性
Theoretical research on correlation between microscopic fractal characteristics and macroscopic permeability of sandstone
摘要
Abstract
To explore the correlation between microscopic characteristics and macroscopic permeability of sandstone interspace,this paper statistically analyzed nine sandstone samples' SEM images (magnified 1000 times) of three drillings from different depths in Suancigou mine.The "perimeter-area" of interspace in SEM image has a good fractal characteristics with fractal dimension between 1 and 1.3.After drawing lessons from water seepage theoretical model of unequal diameter hank tube in macroscopic sandstone interspace,this study established a model based on fractal characteristics of microscopic interspace,deduced computational theory model of permeability coefficient and permeability in microscopic scales,and calculated permeability and permeability coefficient of each samples,which ranges respectively 0.002～0.09mD and 1.2～24.4m/s.In order to verify the theoretical model calculations,permeability of the same core samples under mesoscales was measured with values range of 0.34～0.59mD.Finally,after correlation analysis,a correlative equation of permeability between micro-scale and mesoscales with correlation coefficient of 0.7 was established.It can be concluded that the permeability theoretical formula which is established under sandstone interspace micro-scale has certain rationality,and there is a certain correlation between permeability under mesoscale.关键词
微观孔隙/分形特征/中尺度/渗透率/SEM图像Key words
microscopic interspace/fractal characteristics/mesoscale/permeability/SEM image分类
天文与地球科学引用本文复制引用
连会青,冉伟,夏向学..砂岩微观孔隙分形特征与宏观渗透性能的相关性[J].辽宁工程技术大学学报（自然科学版）,2017,36(6):624-629,6.基金项目
国家自然科学基金(41072188) （41072188）
新世纪优秀人才支持计划(NCET-11-0838) （NCET-11-0838）
“十二五”国家科技支撑计划(2012BAK04B04) （2012BAK04B04）
