煤炭工程 ›› 2013, Vol. 45 ›› Issue (11): 96-98.doi: 10.11799/ce201311032

• 研究探讨 • 上一篇    下一篇

煤层气井压裂对井下瓦斯抽采量与涌出浓度影响研究

宋志敏1,任建刚2   

  1. 1. 河南工程学院
    2. 河南理工大学资源环境学院
  • 收稿日期:2013-03-17 修回日期:2013-06-26 出版日期:2013-11-10 发布日期:2013-11-11
  • 通讯作者: 任建刚 E-mail:renjiangang2005@126.com

Research on influence of the Gas extraction and gushing concentration of Hydraulic Fracturing in Coal-bed Methane Wells

  • Received:2013-03-17 Revised:2013-06-26 Online:2013-11-10 Published:2013-11-11

摘要:

为了确保煤矿安全、高效生产,研究区采用地面煤层气井水力压裂增透工艺提高煤层透气性。通过利用嵌入式人工裂缝实时监测技术对煤层气井压裂所产生的裂缝形态,压裂有效半径进行了实时监测评价,结果显示两口井基本达到了设计要求,与煤层气井水力压裂一般所认同的180m~200m裂缝长度相一致。考察S2205胶带顺槽24个钻场瓦斯抽采量,压裂区较未压裂区提高了2-4倍。但压裂提高瓦斯抽采量的同时也导致了钻场瓦斯涌出浓度的增加。

关键词: 煤层气, 水力压裂, 实时监测, 抽采量, 涌出浓度

Abstract:

In order to ensure the high-efficient production and safety of coal mine, the hydraulic fracturing was used in coal-bed methane wells to increase permeability technical and improve the Gas permeability of coal seam in the research regions. By using embedded artificial fracture generated by real-time monitoring technology for CBM well fracturing fracture morphology, fracture effective radius for the real-time monitoring and evaluation, the monitoring results basically fulfill the design requirements and the identity of the 180m~200m crack length is consistent. The gas extraction of 24 drilling field in S2205 rubber belt roadway were inspected, the area of fracturing zone was 2-4 times bigger than the area of not ones. But fracturing to improve extraction also led to the drill field gas gushing concentration increased.

Key words: CBM, Hydraulic fracturing, real-time monitoring, extraction, gushing concentration

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