鄂尔多斯盆地东缘煤储层渗流孔隙分形特征  

Fractal Characteristics of Coal Reservoir Seepage Pore,East Margin of Ordos Basin

作　　者：张松航[1] 唐书恒[1] 汤达祯[1] 颜志丰[1] 张彪[1] 张佳赞[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083

出　　处：《中国矿业大学学报》2009年第5期713-718,共6页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展规划(973)项目(2009CB219604);国家自然科学基金重点及面上项目(40730422;40772096);国家高技术研究发展计划(863)项目(2006AA06Z235);河南省生物遗迹与成矿过程重点实验室开放基金项目(OTMP0906)

摘　　要：基于压汞试验,分析了鄂尔多斯盆地东缘14个矿区56件煤样储层孔隙的分形特征,通过分维数与煤储层渗透性的比较,得出孔隙体积分维数与煤储层渗流孔隙的渗透性关系.结果表明,煤储层压汞孔隙分形尺度为孔直径86 nm^1000μm,体积分维数2.75~3.24,在区域分布上呈自北向南降低的趋势,与煤变质程度、灰分、矿物含量呈负相关关系,与水分、中孔含量及视孔隙度(>5%)呈正相关关系.储层渗透性的分形表征与分形维数、分形尺度及分形孔隙的分布连通性多因素相关,但在储层孔隙率较低的情况下,分形孔隙的分布连通情况对渗透性起决定性作用.Based on mercury injection experiments,the pore fractal features for 56 coal samples come from 14 mine areas in eastern margin of Ordos basin were studied.The relationship between the pore volume fractal dimension and the permeability of seepage pore were proposed.The results show that the fractal scaling is 86 nm-1 000 μm(diameter) through the pressurized mercury fissure analysis.The pore volume fractal dimension is from 2.75 to 3.24,which has a decreasing tendency from north to south.The negative connecti...

关 键 词：鄂尔多斯盆地 煤储层 分形维数 渗透性 

分 类 号：P618.11[天文地球—矿床学]