分形理论在煤储层物性研究中的应用  

Application of Fractal Theory on Physical Properties in Coal Reservoirs

作　　者：傅雪海[1] 秦勇[1] 薛秀谦[1] 

机构地区：[1]中国矿业大学资源与环境科学学院,江苏徐州221008

出　　处：《煤》2000年第4期1-3,共3页Coal

基　　金：国家自然科学基金资助项目!(49772 131)

摘　　要：基于分形理论在地质问题研究中的标度不变性 ,利用煤层的自然粒级组成和压汞法测出的煤中不同孔径段的比孔密资料。进行了煤岩破碎结构的块度分形和孔隙结构分形 ,并就分形特征在构造煤破碎程度的划分中的意义及其对煤层气开发的影响进行了探讨。尤其指出了煤层孔隙结构分形存在两个“无标度区” ,孔径大于 10 -10 m的分数维 (D1) ,可用于评价煤层气的解吸和运移 ,小于 10 -10 m的分数维 (D2 )可用于评价煤层气的吸附与扩散。Based on scale-invariabless of fractal theory on geological probiem and data of natural size fraction of coal and the specific hole volume measured at sections of different diameters by mercury porosimeter,blocky fractal of coal fractural structure and pore structure fractal of coal are researched and their significance in classifying.Severity of failure of tectonic coal and their effects on developing coal bed methane are discusseel.Especilly,it is suggested that there are two invariable ranges of scale in coal pore structure.Desorption and permeability can be estimated by fractal dimensions (D 1),whose pore diameters are more than 10 -7 m,and soption and duffusion can be evaluated by fractel dimensions (D 2),whose pore diameters are less than 10 -7 m.

关 键 词：破碎结构 孔隙结构 压汞法 分形维数 构造煤 煤层气 裂隙 

分 类 号：P618.11[天文地球—矿床学] O415.5[天文地球—地质学]