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YUAN Zheng, HUANG Jie, GUO Bumin, KONG Peng, XING Yunlong, WANG Xuxing, ZHOU Biao. Multi-factor Risk Analysis of Hydraulic Fracturing Slug Technology in Coal-bed Gas Well[J]. Safety in Coal Mines, 2016, 47(10): 157-160.
Citation: YUAN Zheng, HUANG Jie, GUO Bumin, KONG Peng, XING Yunlong, WANG Xuxing, ZHOU Biao. Multi-factor Risk Analysis of Hydraulic Fracturing Slug Technology in Coal-bed Gas Well[J]. Safety in Coal Mines, 2016, 47(10): 157-160.
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Multi-factor Risk Analysis of Hydraulic Fracturing Slug Technology in Coal-bed Gas Well

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  • Published Date: October 19, 2016
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    • Abstract
  • Based on a large quantity of field work and extended theory of hydraulic fracturing, a problem that proppant slug could cause early sand plug during hydraulic fracturing work of coal-bed gas well is proposed. The effect on crack geometry was analyzed during coal-bed gas well hydraulic fracturing from fluid volume, pump rate, fracture turning, multi-fracture. The influence was elaborated by combining theory with numerical simulation, including the impact of the factors on fracture's geometry, fluid efficiency, especially fracture width. Corresponding construction measures were proposed for different factors. The increase of pump rate and fracturing fluid and increasing volume of injection liquid is advantageous to the proppant slug into the cracks. The measures, including increasing liquid viscosity and pumping rate, directionally perforating along maximum horizontal stress, could decrease even avoid sand plug risk caused by fracture turning. Fine sand was used as slug proppant to weaken multi-fracture's effect, which was benefit for laying proppant, decreasing liquid loss, increasing liquid efficiency.
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