摘要
针对煤层压裂过程产生的煤粉易造成煤层裂缝堵塞、影响裂缝的扩展等问题,考察了不同类型表面活性剂对煤粉的悬浮性能,综合考虑煤粉表面润湿性、工作液返排等因素,筛选出了合适的煤粉悬浮剂主剂,并进行了相关复配及性能研究。结果表明,煤粉悬浮剂的最优组成为:n(十八烷基三甲基氯化铵)∶n(壬基酚聚氧乙烯醚)∶n(乙醇胺)=1∶1∶1;当质量浓度为0.3g/L时,溶液表面张力为36.2mN/m,其处理后的煤粉片表面与水的接触角为86°,对煤粉的悬浮率可达40.02%。
There is much coal powder generated during coal-bed fracturing, which will block off coalbed fractures and be harmful to the expansion of cracks. Considering coal surface wettability and flow-backing working fluid, coal powder suspending ability of different surfactants is investigated; suitable main agents of coal powder suspending agent are selected and compounded with some additives. The results show that the best ratio of octadecyl trimethyl ammonium chloride to OP-40 to ethanolamine is 1 ： 1 ： 1, the surface tension is 36.2 mN/m, the contact angle between water and coal powder treated with it is 86°, and the suspending percentage reaches 40.02% when the concentration is 0. 3 g/L.
出处
《精细石油化工》
CAS
CSCD
北大核心
2011年第6期59-62,共4页
Speciality Petrochemicals
基金
国家科技重大专项课题(2011ZX05037)
关键词
煤层气
压裂
煤粉
悬浮剂
润湿性
coalbed methane
fracturing
coal powder
suspending agent
wettability
