摘要
在煤岩填砂裂缝导流能力的实验研究中,分析研究煤粉粒径以及支撑剂铺砂浓度这两个方面对煤岩填砂裂缝导流能力的影响。从实验结果来看,裂缝导流能力随着围压的增加而降低。煤粉的粒径越小对裂缝的导流能力造成的损失越大。铺砂浓度越大,煤岩裂缝之间所产生的导流裂缝的缝宽越大,导流能力越好。铺砂浓度为0.5 kg/m2的裂缝导流能力随围压的变化非常明显,趋近于线性变化,对压力较为敏感。
The impact of the coal particle size and the proppant sanding concentration on the conductivity is mainly studied in the experimental study about the conductivity of the sand-pack fracture in the coal. The fracture conductivity decreases with the increase of the confining pressure in the results. The smaller the coal particle size is, the loss of the fracture conductivity is larger. If the sanding concentration is bigger, the fracture conductivity in the coal will become larger leading to better conductivity. The conductivity at the sanding concentration of 0. 5 kg/m2 varies distinctly with the confining pressure which it tends to the linear change. On this occasion, the conductivity is very sensitive to the confining pressure.
出处
《科学技术与工程》
北大核心
2013年第35期10604-10607,10612,共5页
Science Technology and Engineering
关键词
填砂裂缝
导流能力
铺砂浓度
煤粉粒径
the sand- pack fracture conductivity sanding concentration the coal particle size
