摘要
以2-己基-1-癸醇为主要原料制备了嵌段聚醚磺酸盐类扩展型表面活性剂(IC_(16)P_(6)E_(6)S),评价了IC_(16)P_(6)E_(6)S的溶解性和表面性能,并分别与阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)和两性表面活性剂羧基甜菜碱(HAB)进行复配,探讨了混合比对流体力学直径以及界面性能的影响,测试了二元体系的乳化性能、吸附性能以及岩心驱油效果。结果表明,IC_(16)P_(6)E_(6)S在蒸馏水中的临界胶束浓度(cmc)为0.1 mmol/L,γcmc为28.53 mN/m。IC_(16)P_(6)E_(6)S与HAB、CTAB有较强的协同作用,能有效降低界面张力。n(IC_(16)P_(6)E_(6)S)∶n(HAB)=1∶1和n(IC_(16)P_(6)E_(6)S)∶n(CTAB)=1∶3混合体系分别在1%~7%NaCl和3%~7%NaCl盐度范围内将界面张力保持在超低(10^(-3)mN/m数量级)和低界面张力(10^(-2)mN/m数量级)范围。随着盐度的增加,复配表面活性剂体系形成的乳液经历从WinsorⅠ到WinsorⅢ再到WinsorⅡ的相转变过程,IC_(16)P_(6)E_(6)S/HAB复配体系较IC_(16)P_(6)E_(6)S/CTAB混合体系能够产生更多的中相乳液,乳液体系更稳定,油增溶量高达43 mL/g,同时具有较好的抗吸附性能;与水驱相比,其降压率可达到25.00%,采收率提高11.75%,说明IC_(16)P_(6)E_(6)S/HAB复配体系更有利于低渗透储层的降压增注。
2-Hexyl-1-decanol was used as the main material to prepare a block-polyether sulfonate extended surfactant(IC_(16)P_(6)E_(6)S).The solubility and surface active properties of IC_(16)P_(6)E_(6)S were evaluated,and then the IC_(16)P_(6)E_(6)S was mixed with a cationic surfactant hexadecyl trimethyl ammonium bromide(CTAB)and a zwitterionic betaine surfactant(HAB),respectively.The effects of mixing ratios of IC_(16)P_(6)E_(6)S∶HAB and IC_(16)P_(6)E_(6)S∶CTAB on the hydrodynamic diameter and interfacial properties were discussed.The emulsification,adsorption and laboratory core displacement experiments of the binary system were tested.The results showed that the critical micelle concentration(cmc)of IC_(16)P_(6)E_(6)S in distilled water was 0.1 mmol/L and the surface tension at cmc(γcmc)was 28.53 mN/m.IC_(16)P_(6)E_(6)S showed strong synergistic effects with HAB and CTAB,and the mixed systems could effectively reduce the interfacial tension compared with single surfactants.The mixed systems with n(IC_(16)P_(6)E_(6)S)∶n(HAB)of 1∶1 and n(IC_(16)P_(6)E_(6)S)∶n(CTAB)of 1∶3 could maintain ultra-low interfacial tension(in the order of magnitude of 10^(-3)mN/m)in the salinity range of 1%-7%NaCl and low interfacial tension(in the order of magnitude of 10^(-2)mN/m)in the salinity range of 3%-7%NaCl,respectively.With the increase of salinity,the emulsion formed by the mixed surfactant system underwent the phase transition process from WinsorⅠto WinsorⅢand then to WinsorⅡ.The emulsion of mixed IC_(16)P_(6)E_(6)S/HAB system had more middle-phase emulsion volume than that of the mixed IC_(16)P_(6)E_(6)S/CTAB system,and the former emulsion system was more stable.The mixed IC_(16)P_(6)E_(6)S/HAB system also had good solubilization effect,and the amount of oil solubilization was up to 43 mL/g.Meanwhile,it had good adsorption resistance.Compared with water flooding,the depressurization rate could reach 25.00%and the recovery could be enhanced by 11.75%,indicating that the IC_(16)P_(6)E_(6)S/HAB system was more conducive to the depressurization and injection enhancement for low-permeability reservoirs.
作者
曾小丁
郑延成
张国庆
曾令迟
穆健
Xiaoding Zeng;Yancheng Zheng;Guoqing Zhang;Lingchi Zeng;Jian Mu(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou,Hubei 434023,China)
出处
《日用化学工业（中英文）》
CAS
北大核心
2024年第12期1405-1413,共9页
China Surfactant Detergent & Cosmetics
基金
国家自然科学基金面上项目“碳点改性粒子协同扩展表面活性剂驱油体系构筑及机制研究”(52374030)。
关键词
扩展表面活性剂
界面张力
吸附性能
动态光散射
降压增注
extended surfactant
interfacial tension
adsorption property
dynamic light scattering
depressurization and enhanced injection
