磺酸盐型阴-非离子表面活性剂的合成及性能评价
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国家自然科学基金“生物基表面活性剂固液界面吸附特征及其微观演变机理研究”(项目编号 52404050),油气资源与工程全 国重点实验室“地质封存条件下 CO2 - 岩石微观作用机理研究”(项目编号 PRE/DX-2408)


Synthesis and Performance Evaluation of Sulfonate-type Anionic-nonionic Surfactants
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    摘要:

    在高温高盐苛刻的油藏环境中,传统阴离子型表面活性剂与非离子型表面活性剂易失活,无法发挥最佳的采油效果。阴-非离子表面活性剂兼具二者的特性,具有良好的界面活性,耐高温耐高矿化度等优点,在提高采收率方面具有广阔的应用前景。以乙氧基数为 7 和 9 的脂肪醇聚氧乙烯醚(AEO7、AEO9)、壬基酚聚氧乙烯醚(NP7、NP9)为原料,通过磺烷基化法成功合成了一系列带有磺酸基团的阴-非离子表面活性剂(AESO7、AESO9、 NPSO7、NPSO9),产率均在70%左右,并测定了产物的表面活性、耐盐性、耐温性等性能。研究结果表明,AESO7、 NPSO7 溶液在临界胶束浓度下的表面张力为 27.16、28.67 mN/m,低于 AESO9、NPSO9 的。在矿化度为 10~100 g/L 的模拟海水中,4 种表面活性剂展现出较好的耐盐性能,表面张力均保持稳定。随温度升高,AESO9、 NPSO9乳状液的析水率较AESO7、NPSO7的略大,在温度为60~80 ℃下4种质量浓度为10 g/L 的表面活性剂溶液与煤油按体积比1∶1所得到的乳状液的析水率基本保持稳定,改性后表面活性剂的耐温性能得到显著优化。 AESO7、AESO9与α-环糊精(α-CD)按复配比为1∶2得到的复配体系的表面张力显著降低,在不同温度下,相较于单一体系乳状液稳定性能提升约10%,同时在矿化度为10~100 g/L 的模拟海水中其表面张力亦保持稳定,展现出优良的耐盐性能。

    Abstract:

    For high-temperature and high-salinity oil reservoirs,the traditional anionic and nonionic surfactants are easily deactivated and cannot achieve the best oil recovery effect. Anionic-nonionic surfactants have both advantages,showing good interfacial activity,high temperature resistance and high salinity resistance,which possess great potential applications in EOR. Using aliphatic alcohol polyoxyethylene ethers(AEO7,AEO9)and nonylphenol polyoxyethylene ethers(NP7,NP9)with EO number of 7 and 9 as raw materials,anionic-nonionic surfactants with sulfonic acid groups,named as AESO7,AESO9,NPSO7, NPSO9,was synthesized by sulfonylation method,with a yield of 70% . The surface activity,salt resistance,temperature resistance and other properties of products were determined. The results showed that the surface tensions of AESO7 and NPSO7 solutions at the critical micelle concentration were 27.16 and 28.67 mN/m,which were lower than that of AESO9 and NPSO9 solutions. In the seawater solution with the salinity of 10—100 g/L,four surfactants showed good salt resistance and the surface tension remained stable. As the temperature increased,the water separation rate of AESO9、NPSO9 emulsion were larger than that of AESO7、NPSO7. At the temperature of 60—80 ℃,the water separation rates of the emulsion,prepared through mixing 10 g/L surfactant solutions and kerosene with volume ratio of 1∶1,remained relatively stable,indicating the temperature resistance of the modified surfactants had been significantly improved. When AESO7,AESO9 and α-cyclodextrin(α-CD)were compounded at the mass ratio of 1∶2,the surface tension of the complex system at the critical micelle concentration was further reduced,and the emulsion stability was improved by approximately 10% compared with that of the single system under different temperatures, which also remained relatively stable in simulated seawater(10—100 g/L),and had excellent salt-resistance.

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刘子龙,王 馨,黑艳晓,刘月亮,王 敬.磺酸盐型阴-非离子表面活性剂的合成及性能评价[J].油田化学,2025,42(2):312-322.
LIU Zilong, WANG Xin, HEI Yanxiao, LIU Yueliang, WANG Jing. Synthesis and Performance Evaluation of Sulfonate-type Anionic-nonionic Surfactants[J]. OILFIELD CHEMISTRY,2025,42(2):312-322.

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  • 在线发布日期: 2025-07-25
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