文献类型：期刊文献

中文题名：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

英文题名：Study on pore structure and fractal characteristics of middle rank coal reservoir in Longtan Formation of Panguan syncline

作者：龙钰 陈筠 高为 邬忠虎

第一作者：龙钰

机构：[1]贵州大学资源与环境工程学院,贵州贵阳550025;[2]贵州理工学院继续教育学院,贵州贵阳550003;[3]贵州省煤层气页岩气工程技术研究中心,贵州贵阳550008;[4]贵州大学土木工程学院,贵州贵阳550025

第一机构：贵州大学资源与环境工程学院,贵州贵阳550025

年份：2025

卷号：56

期号：6

起止页码：51-62

中文期刊名：煤矿安全

外文期刊名：Safety in Coal Mines

收录：;北大核心:【北大核心2023】；

基金：贵州省科技计划资助项目(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)。

语种：中文

中文关键词：煤层气;煤储层;龙潭组;中阶煤;孔隙结构;分形特征

外文关键词：coalbed methane;coal reservoir;Longtan Formation;middle rank coal;pore structure;fractal characteristic

摘要：为了研究中阶煤煤储层孔隙结构特征,通过扫描电镜、高压压汞等试验定性和定量分析了盘关向斜8口参数井中不同煤层的15个中阶煤煤样的孔隙结构特征;基于分形理论量化了不同孔径段孔隙分形特征,并探讨了分形维数与镜质组反射率和煤的无机质组成、孔隙结构参数、孔隙度和渗透率之间的关系。结果表明:盘关向斜龙潭组中阶煤微观孔隙主要有5种类型,压汞曲线孔隙形态分为3种类型;渗流分形维数均小于扩散分形维数,综合分形维数主要反映了扩散孔的复杂性;渗流分形维数与镜质组反射率、灰分、矿物质量分数、孔隙率、平均孔径、总孔容、渗透率呈负相关关系,与水分呈正相关关系;扩散分形维数与灰分、矿物质量分数、孔隙率、平均孔径、总孔容呈负相关关系,与镜质组反射率、水分、总孔比表面积呈正相关关系。
In order to study the pore structure characteristics of middle rank coal reservoirs,we qualitatively and quantitatively analyzed 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 characteristics of different aperture segments based on the fractal theory,and discussed the relationship between fractal dimensions and vitrinite reflectance,as well as the inorganic composition of the coal,the pore structure parameters,the porosity discussed and the permeability.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 diffusion 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.