摘要
北龙凤井田采用地面钻井排放瓦斯,并用三个水力压裂钻孔和一个观察钻孔检验煤层压裂前后瓦斯排放效果,结果与井下穿煤抽瓦斯钻孔平均自然瓦斯涌出量比较,与井下-340m水平抽放钻孔比较,压裂钻孔排放瓦斯平均流量大幅增加,压裂钻孔总排放瓦斯效率显著提高,水力压裂后瓦斯排放效果明显改善。
North Longfeng minefield gas emission employ ground well drilling, using one hydraulic fracturing drilling and an observation hole to test the gas drainage effect before and after hydro fracture, With coal seam gas drainage bore-hole average natural gas emission compared, with gas extraction drill of - 340m level, the average flow of fracturing drill- ing gas drainage increase significantly, the total drilling gas drainage efficiency raise significantly, gas drainage effect is improved obviously after hydraulic fracturing.
出处
《内蒙古煤炭经济》
2013年第7期174-175,180,共3页
Inner Mongolia Coal Economy
关键词
地面钻井
水力压裂
瓦斯排放
效果分析
ground well drilling
hydro fracture
gas drainage
effect analysis
