十六烷基三甲基溴化铵和3种十二烷基阴离子表面活性剂复配驱油体系的性能

研究3种不同亲水基结构的阴离子表面活性剂（十二烷基苯磺酸钠(sodium alkyl benzene sulfonate,ABS)、十二烷基硫酸钠(sodium dodecyl sulfate,SDS)、十二烷基羧酸钠(sodium dichloroisocyanurate,SDC)）与阳离子表面活性剂(十六烷基三甲基溴化铵(cetyltriethyl ammonium bromide,CTAB))的复配体系的性能,考察复配体系的相容性、泡沫量、泡沫稳定性、接触角、表面张力和界面张力.研究结果表明，阴阳离子复配体系在摩尔比接近1∶1时，整个体系的泡沫性能下降，表面张力和界面张力趋于最大值，接触角趋于最小；在SDC-CTAB体系中，当w(CTAB)=10%~30%时，复配体系和胜利油田的原油形成超低界面张力.

Effects of Blend Surfactant on Performance of CTAB and Three Different C12 Anionic Surfactants Complex Oil Displacing System

Properties of three kinds of surfactant composition systems with different hydrophilic group of anionic surfactant (sodium alkyl benzene sulfonate (ABS), sodium dodecyl sulfate (SDS), sodium dichloroisocyanurate (SDC)) and the same cationic surfactant cetyltriethyl ammonium bromide (CTAB) were studied. Compatibility, foam property, contact angle, surface tension and interfacial tension of the systems were measured. The results showed when the mol ratio of anionic and cationic surfactant was close to 1∶1, the systems lost part of foam capacity while surface tension and interfacial tension reached the peak and contact angle was the lowest. The SDC-CTAB system reached ultra-low interfacial tension (IFT) with crude oil when the mass fraction of CTAB was in the range of 10% to 30% in the blend system.