唐朝苗

• 1:中国煤炭地质总局勘查研究总院

摘要(Abstract)：

以介休区块石炭-二叠系煤储层为研究对象,基于低温液氮吸附实验,分析研究了煤储层的孔隙结构及分形特征,运用FHH(Frenkel-Halsey-Hill)模型计算了孔隙分形维数,对比讨论了孔隙结构参数与分形维数的关系,以及煤岩工业分析、煤化程度及煤岩显微组分对分形维数的影响。研究结果表明:本区煤岩低温氮气吸/脱附曲线具有H1和H2两种类型,H1型煤岩孔隙以圆筒形孔为主,有利于煤层气的解吸和扩散; H2型以狭缝型孔和一端封闭的平行板状孔为主,有利于煤层气的吸附和储集;煤岩孔体积的贡献主要来自中孔,比表面积的贡献主要来自微孔。本区中变质程度煤储层孔隙具有分形特征,煤岩总孔容、总比表面积越大、分形维数越大,孔隙结构非均质性越强,分形维数可以有效反映孔隙结构特征。分形维数与Ro、水分、灰分呈正相关,与镜质组、惰质组含量呈负相关,本区中变质程度煤储层分形维数受煤岩热演化程度影响明显。

关键词(KeyWords)： 低温液氮吸附实验;孔隙特征;分形维数;介休区块

Abstract:

Keywords:

基金项目(Foundation): 中国煤炭地质总局勘查研究总院青年科技创新基金项目(ZGMDKZ-Y-201902(ZY))

作者(Author): 唐朝苗

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