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...
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
鄂尔多斯盆地
煤储层
分形维数
渗透性
Ordos basin
coal reservoir
fractal dimension
permeability
