煤矿安全2025，Vol.56Issue(2)：67-74,8.DOI:10.13347/j.cnki.mkaq.20231735
沁水盆地柿庄南区块煤层气井煤粉产出特征及控制机理研究
Output characteristics and control mechanism of coal powder from coalbed methane wells in Shizhuang Block in the south of Qinshui Basin
摘要
Abstract
For the serious problems of pulverized coal production in some coalbed methane wells in Shizhuang Block in the south of Qinshui Basin,this study recognizes the coal structure of CBM wells in the study area by using the integrated identification method of the well-logging curve and the tectonic curvature,and analyzes the output characteristics of different CBM wells,such as the mass concentration,particle size,and morphology of the coal powder.It is found that the identification results of logging parameters and tectonic curvature are well matched,in the southern part of the study area,the structural curvature value is low,and the primary and cataclastic structural coal is the main one,while the structural curvature value near the fault development is high,and the cataclastic and mylonitic structural coal is the main one,there is a good correlation between the characteristics of coal powder and the coal body structure.The concentration of primary structural coal in Shizhuang south CBM well is 0.271 g/L,the mass concentration of frac-tured structural coal is 0.634 g/L,and the concentration of granulated-mylonitic structural coal is 4.872 g/L.The particle size of the output coal powder is mainly in the range of 1-100 μm;the pulverized coal with particle size of 1-10 μm gradually increases with the crushing of the coal structure,and the pulverized coal with particle size more than 1 000 μm gradually decreases.Under the influ-ence of structure and drainage,the shape of pulverized coal gradually tends to be spherical and flaky aggregate.关键词
煤层气井/煤粉产出特征/煤体结构/构造曲率/测井曲线Key words
coalbed methane wells/output characteristics of coal powder/coal structure/structural curvature/well logging curve分类
矿山工程引用本文复制引用
任峻杉,张洲,邢丽茹,余婉莹,王鹏翔,邹强,杨正滔..沁水盆地柿庄南区块煤层气井煤粉产出特征及控制机理研究[J].煤矿安全,2025,56(2):67-74,8.基金项目
国家自然科学基金重点资助项目(42230814) （42230814）
河南省科技攻关资助项目(222102320140) （222102320140）
