煤矿安全2025，Vol.56Issue(6)：51-62,12.DOI:10.13347/j.cnki.mkaq.20240197
盘关向斜龙潭组中阶煤煤储层孔隙结构及其分形特征研究
Study on pore structure and fractal characteristics of middle rank coal reservoir in Longtan Formation of Panguan syncline
摘要
Abstract
In order to study the pore structure characteristics of middle rank coal reservoirs,we qualitatively and quantitatively ana-lyzed the pore structure characteristics of 15 middle rank coal samples from different coal seams in 8 parameter wells in the Panguan syncline by scanning electron microscopy and high-pressure mercury pressure experiments,and quantified the pore fractal character-istics of different aperture segments based on the fractal theory,and discussed the relationship between fractal dimensions and vitrin-ite reflectance,as well as the inorganic composition of the coal,the pore structure parameters,the porosity discussed and the per-meability.The results show that:there are mainly five types of microscopic pores in the middle rank coal of Longtan Formation in Panguan syncline;the pore morphology of the piezoelectric mercury curve is divided into three types;the seepage fractal dimensions are smaller than the diffusion fractal dimensions,and the comprehensive fractal dimensions mainly reflect the complexity of the dif-fusion pores;the seepage fractal dimensions are negatively correlated with the vitrinite reflectance,the ash,the mineral mass fraction,the porosity,the average pore size,the total pore volume,and the permeability,and positively correlated with the moisture;and the diffusion fractal dimensions are negatively correlated with the ash,the mineral mass fraction,the average pore size,and the total pore volume.The diffusion fractal dimension is negatively correlated with ash,mineral content,porosity,average pore size,total pore volume,and positively correlated with vitrinite reflectance,moisture,and total pore specific surface area.关键词
煤层气/煤储层/龙潭组/中阶煤/孔隙结构/分形特征Key words
coalbed methane/coal reservoir/Longtan Formation/middle rank coal/pore structure/fractal characteristic分类
矿业与冶金引用本文复制引用
龙钰,陈筠,高为,邬忠虎..盘关向斜龙潭组中阶煤煤储层孔隙结构及其分形特征研究[J].煤矿安全,2025,56(6):51-62,12.基金项目
贵州省科技计划资助项目(黔科合平台人才-CXTD[2022]016) （黔科合平台人才-CXTD[2022]016）
贵州省科学技术基金资助项目(黔科合基础[2019]1142) （黔科合基础[2019]1142）
