發(fā)布時(shí)間：2018-04-14 12:36

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

【摘要】：激光鉆井是一項(xiàng)高效、清潔、控向性能好的鉆井新技術(shù),在煤層氣開(kāi)發(fā)中潛力巨大。從激光破碎煤巖作用過(guò)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(guò)程;以激光照射到煤巖表面的平均功率密度和激光照射時(shí)間為變量,再分別以空氣和氮?dú)鉃殂@井循環(huán)介質(zhì),進(jìn)行了激光破碎煤巖實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果與理論分析基本一致,具體表現(xiàn)為:在一定范圍內(nèi),增加激光平均功率密度和激光照射時(shí)間將使鉆井進(jìn)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(jìn)效率,而氮?dú)庋h(huán)和空氣循環(huán)激光破碎煤巖各有優(yōu)勢(shì),可進(jìn)行交變循環(huán)鉆進(jìn)。
[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(guó)地質(zhì)大學(xué)(武漢)機(jī)械與電子信息學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41272174) 中央高校基本科研業(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金“搖籃計(jì)劃”(CUG130412) 中國(guó)地質(zhì)大學(xué)(武漢)大學(xué)生自主創(chuàng)新資助計(jì)劃(1410491T03)~~
【分類(lèi)號(hào)】：TD842
，

本文編號(hào)：1749360