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