激光破碎煤岩作用过程理论分析与实验研究

发布时间：2018-04-14 12:36

  本文选题：激光钻井 + 煤岩破碎　； 参考：《煤田地质与勘探》2016年05期

【摘要】：激光钻井是一项高效、清洁、控向性能好的钻井新技术,在煤层气开发中潜力巨大。从激光破碎煤岩作用过程和循环气体两方面入手,在理论上分析了激光破碎煤岩的作用过程;以激光照射到煤岩表面的平均功率密度和激光照射时间为变量,再分别以空气和氮气为钻井循环介质,进行了激光破碎煤岩实验。实验结果与理论分析基本一致,具体表现为:在一定范围内,增加激光平均功率密度和激光照射时间将使钻井进尺深度增加,钻孔直径增大,热影响区域增大,有利于提高激光破碎煤岩钻进效率,而氮气循环和空气循环激光破碎煤岩各有优势,可进行交变循环钻进。
[Abstract]:Laser drilling is a new drilling technology with high efficiency, cleanness and good directional control performance, which has great potential in coalbed methane development.Starting with the process of laser crushing coal and rock and circulating gas, this paper theoretically analyzes the process of laser crushing coal and rock, taking the average power density and the time of laser irradiation to the surface of coal and rock as variables.The experiments of laser crushing of coal and rock were carried out using air and nitrogen as drilling circulation media respectively.The experimental results are basically consistent with the theoretical analysis. In a certain range, increasing the average laser power density and laser irradiation time will increase the depth of drilling, increase the diameter of borehole and increase the heat affected area.It is beneficial to improve the drilling efficiency of laser crushing coal and rock, while nitrogen cycle and air circulation laser crushing coal and rock have respective advantages, so alternating cycle drilling can be carried out.
【作者单位】： 中国地质大学(武汉)机械与电子信息学院;
【基金】：国家自然科学基金项目(41272174) 中央高校基本科研业务费专项资金“摇篮计划”(CUG130412) 中国地质大学(武汉)大学生自主创新资助计划(1410491T03)~~
【分类号】：TD842
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本文编号：1749360