基于COMSOL数值模拟的液态CO<sub>2</sub>相变致裂布孔参数优化

张柏林; 李豪君; 张兴华

基于COMSOL数值模拟的液态CO₂相变致裂布孔参数优化

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- 发布日期: 2018-09-19

Parameters Optimization for Hole Layout of Liquid CO₂ Phase-change Fracturing Technology Based on COMSOL Numerical Simulation

摘要

摘要: 为了能将液态CO₂相变致裂技术高效地应用到低透气煤层强化增透领域，基于COMSL软件对液态CO₂相变致裂技术布孔参数进行数值模拟优化，并在平煤十三矿进行了穿层强化预抽煤层瓦斯试验，对优化结果进行了验证。不同布孔方式、孔排间距参数下模拟试验和现场试验研究结果表明：同孔距下“隔二爆一”布孔方式其致裂后抽采效果优于“隔一爆一”布孔方式，最终确定平煤十三矿最佳布孔方式为孔距为6 m的“隔二爆一”式。
- 液态CO₂相变致裂 /
- 低透煤层 /
- 布孔方式 /
- 数值模拟 /
- 瓦斯抽采 /
- 卸压增透
Abstract: In order to effectively apply the liquid CO₂ phase-change fracturing to the field of low permeability coal seam reinforcement and permeability improvement, this paper simulated and optimized the parameters of hole layout of the liquid CO₂ phase-change fracturing technology based on COMSOL, and the result is validated through the test of pre-pumping coal seam gas by cross-strata borehole in Pingdingshan No.13 Mine. The results of simulation test and field test under different hole layout and hole spacing parameters show that, with the same hole spacing, the method of “blasting one hole in every three holes” is superior to that of “blasting one hole in every two holes”. Finally, it is determined that the best hole arrangement for Pingdingshan No.13 Mine is “blasting one hole in every three holes” with a hole spacing of 6 m.
- liquid CO₂ phase-change fracturing /
- low permeability coal seam /
- hole arrangement /
- numerical simulation /
- gas drainage /
- unloading permeability improvement

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参考文献(16)

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文章访问数: 178
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PDF下载量: 4
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基于COMSOL数值模拟的液态CO2相变致裂布孔参数优化

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出版历程

Parameters Optimization for Hole Layout of Liquid CO2 Phase-change Fracturing Technology Based on COMSOL Numerical Simulation

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目录

基于COMSOL数值模拟的液态CO₂相变致裂布孔参数优化

Parameters Optimization for Hole Layout of Liquid CO₂ Phase-change Fracturing Technology Based on COMSOL Numerical Simulation