| 不同扩孔半径下的钻孔水力压裂数值模拟研究 |
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| 引用本文： | 熊俊杰,' target='_blank'>,杨程涛,' target='_blank'>,王洪盘,' target='_blank'>,柴锡军,' target='_blank'>.不同扩孔半径下的钻孔水力压裂数值模拟研究[J].中州煤炭,2019,0(1):27-31. |
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| 作者姓名： | 熊俊杰 ' target='_blank'> 杨程涛 ' target='_blank'> 王洪盘 ' target='_blank'> 柴锡军 ' target='_blank'> |
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| 作者单位： | （1.河南能源化工集团研究总院有限公司，河南 郑州 450046；2.河南省低渗突出煤层煤与瓦斯共采工程技术研究中心，河南 郑州 450046） |
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| 摘 要： | 利用RFPA数值模拟软件构建了钻孔水力压裂数值物理模型，分析了应力平衡状态对钻孔水力压裂的影响，研究了不同扩孔半径下的钻孔水压裂纹的发展演化规律。研究得出:破煤压力在钻孔开挖完待应力平衡后加载水压明显降低；随着钻孔扩孔半径的增加，破煤压力、分支裂纹初现水压、最终水压及平均范围角都将降低，水压主裂纹的长度将增加。研究为煤矿井下现场实施水力压裂技术提供了一定的理论支撑。
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| 关 键 词： | 钻孔 高压水射流 水力压裂 数值模拟 破煤压力 裂纹 |
Research on numerical simulation of hydraulic fracturing with boreholes in different radius of reaming |
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| Xiong Junjie,' target='_blank'>,Yang Chengtao,' target='_blank'>,Wang Hongpan,' target='_blank'>,Chai Xijun,' target='_blank'>. Research on numerical simulation of hydraulic fracturing with boreholes in different radius of reaming[J].Zhongzhou Coal,2019,0(1):27-31. |
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| Authors: | Xiong Junjie ' target='_blank'> Yang Chengtao ' target='_blank'> Wang Hongpan ' target='_blank'> Chai Xijun ' target='_blank'> |
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| Affiliation: | （1.Henan Energy and Chemical Industry Research Institute Group Co.，Ltd.，Zhengzhou 450046，China； 2.Henan Engineering Research Center of Simultaneous Extraction of Coal and Gas with Low Permeability & Outburst Coal Seam，Zhengzhou 450046，China） |
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| Abstract: | The numerical physical model of drilling hydraulic fracturing was established by using the RFPA numerical simulation software.The influence of stress balance on hydraulic fracturing of boreholes was analysed.The development and evolution of cracks in boreholes under different radius of reaming was researched.Results were obtained that，the coal seam initiation pressure was obviously reduced after the borehole was excavated to be stress-balanced.The coal seam initiation pressure，the initial branch fracture water pressure，the stable expansion water pressure and the average range angle of the crack decrease with the increase of the borehole enlargement radius.The length of the main hydraulic fracture increases with the increase of the borehole enlargement radius.The research provided some theoretical support for hydraulic fracturing technology on site. |
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| Keywords: | ,drill hole, high-pressure water jet, hydraulic fracturing, numerical simulation, initiation pressure, crack |
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