摘要
为了研究相似材料中煤粉粒径的选取对水力压裂效果的影响,运用室内水力压裂试验系统,以不同粒径煤粉成型的试样为压裂对象,在同应力同压裂液排量的条件下,开展了水力压裂试验。研究结果表明,煤粉粒径越大,成型的试样的破裂压力越大,破裂区域越大,水力裂缝扩展路径越平直。煤粉粒径越小,试样压裂时水力裂缝的扩展易受到煤粉的作用,扩展路径变得复杂。
In order to study the influence of coal partical sizes on the effect of hydraulic fracturing during the selection of similar materials, taking the samples with different particle size of pulverized coal forming as fracturing objects, the hydraulic fracturing test was carried out under the condition of the same stress and fracturing fluid displacement with the hydraulic fracturing test system. The results show that the fracture pressure of formed sample is bigger with the increase of pulverized coal size, and the rupture zone is larger and the extended path is more smooth. With the decrease of coal powder size, the expansion of hydraulic fi＇acture is easy to be affected by the coal powder and the expansion path becomes more complex.
出处
《煤矿安全》
北大核心
2017年第5期29-32,共4页
Safety in Coal Mines
基金
河南省教育厅科学技术研究重点资助项目(13A440320)
河南省科技创新杰出青年基金资助项目(164100510024)
2015年安全生产重大事故防治关键技术重点科技资助项目(henan-0007-2015AQ)
关键词
煤层气
水力压裂
煤粉
破裂压力
水力裂缝
物理模拟
coalbed methane
hydraulic fracturing
pulverized coal
fracture pressure
hydraulic fracture
physical simulation
