摘要
以表面活性剂Span 80和Tween 80与正构烷烃为主要原料,应用正交设计实验方法优化出微乳液形成的最佳条件:油相选正庚烷或正辛烷,Span 80与Tween 80质量比(1∶1.5)～(1∶2),Span 80浓度3.9%～4.2%,正丁醇浓度7.0%～9.0%。将3种防垢成分FG-1、FG-2和FG-3分散于微乳液水相中,形成稳定均相的防垢纳米乳液。性能评价结果表明,含有防垢剂FG-1和FG-2的纳米乳液防垢率分别为90.1%和89.6%,与地层水接触后无絮凝物;含有FG-2的纳米乳液防垢剂吸附性好,解吸速率慢,并且高矿化度下仍有较好的防垢性能。与现用防垢剂商品相比,纳米乳液的防垢率随时间变化具有一个峰值,大大增加了防垢剂作用时间,提高了防垢效果,并对岩石渗透率有一定的修复能力。
Based on the surfactants of Span 80,Tween 80 and n-alkanes,the optimal formation conditions of the microemulsion were obtained by the orthogonal design experiments as follows：oil-phase was heptane or octane,mass ratio of Span 80 to Tween 80 was（1∶1.5）～（1∶2）,concentration of Span 80 was 3.9%～4.2% and concentration of n-butanol was 7.0%～9.0%.The stable nano-emulsion scale inhibitors with uniform phase were prepared by three kinds of anti-scaling ingredients FG-1,FG-2 and FG-3 dispersed into aqueous phase.Performance test showed that the two nano-emulsion scale inhibitors with anti-scaling ingredients FG-1 and FG-2 have the anti-scaling rates of 90.1% and 89.6%,respectively.There are no flocculates after contacting with the formation water.The nano-emulsion scale inhibitors with FG-2 possess good adsorption,slow desorption rate and good anti-scaling performance under high salinity.Compared to the existing scale inhibitors,the scale-inhibiting rate of nano-emulsion had a peak value,which greatly increases the reaction time of scale inhibitor,improves the anti-scaling effect and repairs permeability of rock.
出处
《应用化工》
CAS
CSCD
2011年第4期559-563,共5页
Applied Chemical Industry
基金
国家自然科学基金(50904076)
关键词
正交设计
防垢
纳米乳液
渗透率修复
orthogonal design
anti-scaling
nano-emulsion
permeability repairation
