The New Technology of Hydraulic Fracturing Soft Coal Rock Permeability Improvement

Abstract:

According to the low intensity, good plasticity in soft coal seam, the effect of direct fracturing to increase permeability was not ideal, the new technology of hydraulic fracture soft coal rock was proposed, which increased coal seam permeability. Its technical principles and characteristics were researched. Water injection pressure was analyzed, including injection time, parameters of the technology and so on. Field application experiment and effect of inspection were conducted. The results showed that the concentration of gas extraction increased 4.3 times, and the gas extraction flow increased 6.2times. The technology has a good effect of fracturing and advantages in enlarging the released area and decreasing diffusion seepage resistance of coal seam. Most important, the technology has broad application prospects in soft coal seam.

• Periodical: Advanced Materials Research (Volumes 1030-1032)
• Pages: 1255-1259
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.1255
• Online since: September 2014
• Authors: Xue Xi Chen, Yan Ke Zhang*, Yong Xu, Rui Qing Bi
• Keywords: Gas Extraction, Hydraulic Fracturing, Permeability Improvement Technology, Soft Coal Rock

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