摘要
南桐矿区属煤与瓦斯突出区域,煤层透气性系数差,抽采难度大。为此公司在所属矿井应用水力压裂技术抽采煤层瓦斯。试验结果表明:压裂后,压裂孔瓦斯抽采浓度和抽采量呈现"波浪形(高位)长时间稳定缓慢下降"特点,压裂孔瓦斯抽采量大幅提升,单孔产气量比水力割缝孔和普通抽采孔分别提高436倍和570倍。而压裂影响区内抽采孔瓦斯抽采浓度和抽采量呈现"高位较快下降到零"的特点。水力压裂技术抽采煤层瓦斯效果明显,用于煤矿瓦斯治理经济效益显著,应用前景广阔。
Nantong mining area belongs to the area of coal and gas outburst, with less coal seam permeability coefficient and difficult drainage. Thus, Nantong coal company applied hydraulic fracturing technology to ex-tract coal seam gas in its subordinate mines. And test results show that： After fracturing, gas extraction concentration and extraction amount of fracturing holes showed the ＂wavy （high） stable for a long time and then slow down＂ characteristics; Gas drainage amount offracturing hole increased dramatically; Gas production of single hole increased 436 and 570 times more than hydraulic cutting seam hole and ordinary drainage hole; And gas extraction concentration and extraction amount of drainage holes in the impact zone showed the char-acteristics of ＂slow down to zero relative quickly from high position＂. In a word, hydraulic fracturing technology has obvious effect on gasdrainage, which is applied to obviously increase the economic benefit of gas control, and has wide application prospect.
出处
《华北科技学院学报》
2015年第4期58-63,共6页
Journal of North China Institute of Science and Technology
基金
中央高校基本科研业务费资助(PX2013A01)
关键词
水力压裂
低透煤层
瓦斯抽采
Hydraulic Fracturing
Low Permeability Coal Seam
Gas Drainage
