本文選題：激光鉆井 + 煤巖破碎��； 參考：《煤田地質與勘探》2016年05期

【摘要】：激光鉆井是一項高效、清潔、控向性能好的鉆井新技術,在煤層氣開發(fā)中潛力巨大。從激光破碎煤巖作用過程和循環(huán)氣體兩方面入手,在理論上分析了激光破碎煤巖的作用過程;以激光照射到煤巖表面的平均功率密度和激光照射時間為變量,再分別以空氣和氮氣為鉆井循環(huán)介質,進行了激光破碎煤巖實驗。實驗結果與理論分析基本一致,具體表現(xiàn)為:在一定范圍內,增加激光平均功率密度和激光照射時間將使鉆井進尺深度增加,鉆孔直徑增大,熱影響區(qū)域增大,有利于提高激光破碎煤巖鉆進效率,而氮氣循環(huán)和空氣循環(huán)激光破碎煤巖各有優(yōu)勢,可進行交變循環(huán)鉆進。
[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.
【作者單位】： 中國地質大學(武漢)機械與電子信息學院;
【基金】：國家自然科學基金項目(41272174) 中央高�；究蒲袠I(yè)務費專項資金“搖籃計劃”(CUG130412) 中國地質大學(武漢)大學生自主創(chuàng)新資助計劃(1410491T03)~~
【分類號】：TD842
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本文編號：1749360