煤矿安全2025，Vol.56Issue(2)：81-86,6.DOI:10.13347/j.cnki.mkaq.20231167
煤层气井筒单相流阶段煤粉动态沉降规律
Dynamic settlement law of coal powder during single-phase flow stage of coalbed methane wellbore
摘要
Abstract
In response to the severe problem of coal powder production in some coalbed methane wells during the development pro-cess of coalbed methane,a set of coal powder dynamic settlement experimental platform as been developed;based on the on-site pro-duction conditions of coalbed methane wells and the characteristics of coal powder production,experimental conditions were de-signed to meet the on-site production characteristics,and the migration and settlement laws of coal powder in the unidirectional flow stage of coalbed methane wells were explored.The results show that the tuning fork resonant density sensor can achieve real-time monitoring of underground coal powder mass concentration;180-250 μm coal powder particles will be carried and transported when the fluid velocity is greater than or equal to 0.020 m/s;150-180 μm coal powder particles will be carried and transported when the fluid velocity is greater than or equal to 0.010 m/s.When the mass concentration of coal powder is constant,the increase in flow rate will cause the increase in the mass concentration of coal powder in the wellbore,which proves that the increase of drainage speed is helpful to discharge the settled coal from the shaft.关键词
煤层气井/煤粉产出特征/煤粉沉降/单相流/煤粉运移/音叉Key words
coalbed methane well/characteristic of coal powder production/coal powder sedimentation/single phase flow/coal dust migration/tuning fork分类
矿业与冶金引用本文复制引用
胡皓,孔鹏,刘广景,张亚飞,张晓飞,张锦涛,任峻杉,张洲..煤层气井筒单相流阶段煤粉动态沉降规律[J].煤矿安全,2025,56(2):81-86,6.基金项目
中国海洋石油集团有限公司"十四五"重大科技资助项目(KJGG2022-1003) （KJGG2022-1003）
河南省科技攻关资助项目(222102320140) （222102320140）
