支链扩展表面活性剂与两性和阳离子表面活性剂复配性能

doi:10.3969/j.issn.2097-2806.2024.12.001

摘要/Abstract

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（IC₁₆P₆E₆S），评价了IC₁₆P₆E₆S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，IC₁₆P₆E₆S在蒸馏水中的临界胶束浓度（cmc）为0.1 mmol/L，γ_cmc为28.53 mN/m。IC₁₆P₆E₆S与HAB、CTAB有较强的协同作用，能有效降低界面张力。n（IC₁₆P₆E₆S） ∶n（HAB）=1∶1和n（IC₁₆P₆E₆S） ∶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Winsor Ⅰ到Winsor Ⅲ再到Winsor Ⅱ的相转变过程，IC₁₆P₆E₆S/HAB复配体系较IC₁₆P₆E₆S/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IC₁₆P₆E₆S/HAB复配体系更有利于低渗透储层的降压增注。

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

Abstract:

2-Hexyl-1-decanol was used as the main material to prepare a block-polyether sulfonate extended surfactant （IC₁₆P₆E₆S）. The solubility and surface active properties of IC₁₆P₆E₆S were evaluated, and then the IC₁₆P₆E₆S was mixed with a cationic surfactant hexadecyl trimethyl ammonium bromide （CTAB） and a zwitterionic betaine surfactant （HAB）, respectively. The effects of mixing ratios of IC₁₆P₆E₆S∶HAB and IC₁₆P₆E₆S∶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 IC₁₆P₆E₆S in distilled water was 0.1 mmol/L and the surface tension at cmc （γ_cmc） was 28.53 mN/m. IC₁₆P₆E₆S 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 （IC₁₆P₆E₆S） ∶n （HAB） of 1∶1 and n （IC₁₆P₆E₆S） ∶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 Winsor Ⅰ to Winsor Ⅲ and then to Winsor Ⅱ. The emulsion of mixed IC₁₆P₆E₆S/HAB system had more middle-phase emulsion volume than that of the mixed IC₁₆P₆E₆S/CTAB system, and the former emulsion system was more stable. The mixed IC₁₆P₆E₆S/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 IC₁₆P₆E₆S/HAB system was more conducive to the depressurization and injection enhancement for low-permeability reservoirs.

Key words: extended surfactant, interfacial tension, adsorption property, dynamic light scattering, depressurization and enhanced injection

中图分类号:

TQ423

曾小丁, 郑延成, 张国庆, 曾令迟, 穆健. 支链扩展表面活性剂与两性和阳离子表面活性剂复配性能[J]. 日用化学工业（中英文）, 2024, 54(12): 1405-1413.

Xiaoding Zeng, Yancheng Zheng, Guoqing Zhang, Lingchi Zeng, Jian Mu. Performance of branched-chain extended surfactant mixed with zwitterionic or cationic surfactant[J]. China Surfactant Detergent & Cosmetics, 2024, 54(12): 1405-1413.

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n（IC₁₆P₆E₆S） ∶n（HAB）	Diameter/nm	Polydispersity （PDI）
0∶1	157.1	0.139
1∶3	116.9	0.558
1∶1	97.68	0.205
3∶1	110.6	0.225
1∶0	157.2	0.177

n（IC₁₆P₆E₆S） ∶n（CTAB）	Diameter/nm	Polydispersity （PDI）
0∶1	224	0.241
1∶3	181	0.308
1∶1	206	0.124
3∶1	190	0.335
1∶0	157	0.177