摘要
在50℃实验研究了以十二烷基甜菜碱(BS-12)+重烷基苯磺酸盐(HABS)为表面活性剂组分、等质量比的Na2SiO3+Na2CO3为碱组分的AS二元和ASP三元复合体系与大庆采油四厂原油之间的动态界面张力。当碱浓度为12g/L、表活剂浓度为0.5g/L、BS-12、HABS质量比在0～1之间变化时,等BS-12、HABS质量比的AS体系的界面张力最低,最低值可达10-4mN/m数量级。在4～24g/L范围改变碱浓度,则最低界面张力出现在碱浓度为12g/L时,碱对界面张力的影响是双向的。在1～10g/L范围改变外加盐(NaCl)浓度,则盐浓度为3g/L时界面张力最低,1g/L时次之,均可达10-3mN/m。在AS二元体系中加入M=2.5×107的HPAM(加量0～1.6g/L),当HPAM浓度为0.4g/L时,ASP三元体系的动态界面张力在11min后即降至10-4mN/m数量级,当HPAM浓度为1.2g/L时,三元体系的黏度(7.921/s)为29.0mPa.s,界面张力最低值可达10-3mN/m数量级,为性能最佳体系。
The dynamic interfacial tension（IFT） was investigated at 50℃ between the crude oil of the 4th Daqing production factory and the AS and ASP combinational solutions with dodecyl betaine,BS-12,＋heavy alkylbenzene sylfonate（HABS） as surfactant component（S）,Na2SiO3＋Na2CO3 in equal mass ratio as alkaline component（A）,and HPAM of M=2.5×10^7 as polymer component（P）. For AS combinational solutions of A concentration 12 g/L,S concentration 0.5 g/L and BS-12 to HABS mass ratio varying from 0 to 1,the lowest IFT values was observed at equal BS-12 to HABS mass ratio and reached 10^-4 mN/m magnititude;with varying A concentration in range 4—24 g/L the lowest IFT values appeared at A concentration of 12 g/L and the effect of A was didirectional;with varying concentration of NaCl introduced additionally in range 1—10 g/L the lowest IFT values appeared at NaCl concentration of 3 g/L and next lowest IFT values——of 1 g/L and the magnititude of 10^-3 mN/m was reached in both cases. For ASP combinational solutions of optimal A and S concentrations with varying P concentration in range 0—1.6 g/L,the dynamic IFT lowered down to the magnititude of 10^-4 mN/m fast in 11 min at P concentration of 0.4 g/L and the viscosity at 7.92 1/s was of 29.0 mPa·s and the lowest IFT values were of magnititute 10^-3 mN/m at P concentration 1.2 g/L; in the last case the ASP solulion was the optimal ASP flooding fluid.
出处
《油田化学》
CAS
CSCD
北大核心
2010年第1期88-91,共4页
Oilfield Chemistry
关键词
十二烷基甜菜碱
重烷基苯磺酸盐
动态界面张力
协同作用
表面活性剂复合体系
弱复碱
聚合物
大庆原油
驱油剂
dodecyl betaine
heavy alkylbenzene sulfonate
dynamic interfacial tension
synergistic effect
combinational surfactant system
weak mixed alkaline
polymer
Daqing crude oil
flooding fluids for EOR
