无碱二元复合体系与原油之间的界面性能

Interfacial Properties between Alkali-free Binary Compound System and Crude Oil

孙记夫 李海燕 罗翔莉 董朝霞

SUN Jifu LI Haiyan LUO Xiangli DONG Zhaoxia

为了揭示无碱二元复合体系与原油之间的界面性能，利用磺基甜菜碱BS和聚合物KYPAM-2 配制了无碱二元复合体系，系统研究了该体系与克拉玛依油田七东1区原油之间的界面张力。结果表明，二元复合体系与选取的该区块6 口油井的原油之间的界面张力均能降至3.0×10-2mN/m以下，具有很强的适应性；BS浓度在0.5～5.0 g/L 范围时，油水界面张力均能保持在4.1×10-2 ～55×10-3 mN/m范围内，具有很宽的低界面张力窗口；BS具有良好的抗盐、抗钙和抗油井产出水稀释性能；聚合物浓度对二元体系与原油之间的界面张力有一定的影响，但当浓度高于1.2 g/L 时，对油水界面张力的影响较小；通过绘制二元复合体系的界面活性图，为二元体系配方的设计提供了理论上的指导。图7 表2 参9

In order to discover the interfacial properties between alkali-free binary compound system and crude oil，sulfobetaine BS and polymer KYPAM-2 was used to prepare the binary compound system and the interfacial tension between the system and crude oil from East District 7（1）in Karamay oilfield was studied. The results showed that interfacial tension between binary compound system and crude oil from 6 oil wells in this district was all below 3.0×10-2 mN/m，so the binary compound system had strong adaptability in this district ；the interfacial tension between the binary compound system and crude oil could maintain at range of 4.1×10-2 —5.5×10-3 mN/mwhen the concentration of BS was between 0.5—5.0 g/L，so the low interfacial tension window was very wide. The anti-salt，anti-calcium and anti-thinning properties of oil well produced water of BS was excellent. The concentrations of polymer had a certain impact on reducing the interfacial tension between binary compound system and crude oil，however，the concentration of the polymer being higher than 1.2 g/L had less impact on the interfacial tension. Drawing the interface activity map of binary compound system provided a theoretical guidance for formula design of binary compound system.

10.19346/j.cnki.1000-4092.2016.04.026