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首页> 外文期刊>International Journal of Oil, Gas and Coal Technology: IJOGCT >Pulse hydraulic fracturing technology and its application in coalbed methane extraction
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Pulse hydraulic fracturing technology and its application in coalbed methane extraction

机译：脉冲液压压裂技术及其在煤层甲烷提取中的应用

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The sealing and operating procedures of pulse hydraulic fracturing (PHF) were systematically introduced to increase the methane reservoir permeability. The results of a pilot application conducted at Sv719 working face in Daxing coal mine, China, shown that both the sealing and cracking were successfully operated. The injection time and water quantity were positively correlated with the fracturing initiation pressure. The fracturing mechanism of PHF was theoretically analysed, and the relationship between fatigue-loaded coal strength and injecting frequency was studied. A criterion for determining the fracture pressure was established. Compared to conventional hydraulic fracturing and deep-hole blasting, PHF technology is superior in gas-extraction performance, with a relatively high extraction concentration and less gas attenuation. Moreover, the content and pressure of residual gas in the fractured coal seams were reduced below the regulatory limits, with decrease of 46.15-83.67% and 61.61%, respectively. [Received: January 22, 2016; Accepted: May 17, 2017].
机译：系统地引入脉冲水力压裂（PHF）的密封和操作程序以增加甲烷储层渗透性。在中国大兴煤矿的SV719工作面上进行的试验申请的结果表明，密封和破解都成功运行。喷射时间和水量与压裂起始压力呈正相关。理论上分析了PHF的压裂机制，研究了疲劳负载煤强度与注射频率之间的关系。建立了确定裂缝压力的标准。与传统的液压压裂和深孔爆破相比，PHF技术的气体提取性能优异，提取浓度相对高，气体衰减较少。此外，骨折煤层中残留气体的含量和压力降低了监管限值以下，分别降低46.15-83.67％和61.61％。 [收到：2016年1月22日;接受：2017年5月17日]。

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