摘要
以绿色表面活性剂脂肪酸甲酯磺酸钠（MES）和生物柴油（BD-1）为主要原料,应用正交设计试验得到MES中相微乳液形成的最佳条件,通过浓度扫描考察了NaCl和正丁醇质量浓度以及醇种类对微乳液相态、最佳盐浓度、盐宽的影响,同时以MES中相微乳液表面张力为标准,优选出绿色压裂助排剂基本配方。结果表明,随着盐和醇质量浓度的增加,微乳液的相态均经历WinsorⅠ型到WinsorⅢ型再到WinsorⅡ型的转变;而中相微乳液的最佳盐浓度和盐宽随着醇碳链的增加均有降低。形成MES中相微乳液的最佳条件：MES、正丁醇和NaCl的质量浓度分别为10~12,12,6 g/mL;绿色压裂助排剂基本配方：0.5%MES纳米乳液＋0.0075%全氟壬基苯磺酸钠（FC-006）＋0.015%Span80。室内评价显示,MES中相微乳助排率87.07%,比助排剂CF-1提高16百分点,并且储层渗透率恢复率可提高2倍左右,表明环保型中相微乳液在改善压裂助排效果方面具有良好的应用前景。
With a green surfactant fatty acid methyl ester sulfonate（MES） and a biodiesel fuel,the optimal formation conditions of MES middle phase microemulsion were obtained by the orthogonal design experiments.The effects of NaCl and n-butanol mass concentrations,and the type of alcohols on the microemulsion phase behavior,the optimal salinity and the salinity length were investigated.And a basic formula of green fracturing cleanup additive was optimized according to the surface tension of MES middle phase microemulsion.The results showed that the microemulsion phase state changed from Winsor Ⅰ to Winsor Ⅲ and then to Winsor Ⅱ with the increase of salt and alcohol mass concentrations.The optimal salinity and the salinity length of the middle phase microemulsion decreased with the increase of alcohol carbon chain length.The optimal formation conditions of MES middle phase microemulsion were as follows： cMES 10-12 g/mL,cn-butanol 12 g/mL,cNaCl 6 g/mL.The basic formula of green fracturing cleanup additive was 0.5% MES nano-emulsion ＋0.0075% FC-006 ＋ 0.015% Span80.Laboratory evaluation showed that the cleanup rate of MES middle phase microemulsion was 87.07%,which was increased by 16 percent,compared to the cleanup additive CF-1.The permeability recovery ratio of reservoir was enhanced by about 2 times with the use of MES middle phase microemulsion,which verified the potential application of an environment-friendly middle phase microemulsion in improving fracturing cleanup effect.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2011年第3期454-460,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金项目(50904076)资助
关键词
正交设计
可生物降解
脂肪酸甲酯磺酸钠(MES)
中相微乳液
压裂助排
orthogonal design
biodegradable
fatty acid methyl ester sulfonate（MES）
middle phase microemulsion
fracturing cleanup
