十二烷基嵌段聚醚磺酸钠与甜菜碱Gemini表面活性剂复配体系的协同驱油性能

doi:10.3969/j.issn.2097-2806.2026.03.002

摘要/Abstract

摘要：

为应对高矿化度油藏化学驱中表面活性剂耐盐性差、界面活性不足等问题，合成了一种新型的十二醇聚氧丙烯-聚氧乙烯醚丙基磺酸钠延展表面活性剂（C12P6E6PS），将其与实验室自制的1,2-双[N-甲基-N-3-磺丙基十二烷基铵]乙烷甜菜碱型Gemini表面活性剂（GCS12）进行复配，并评价了复配体系的溶解性、界面活性、乳化性能、润湿改性能力及驱油效果。结果表明，n （C12P6E6PS） /n （GCS12） = 2∶1复配体系的性质具有显著协同效应，可在高盐度范围（150~200 g/L）内实现超低界面张力（最低达0.007 mN/m），并在12% NaCl高盐度条件下仍保持64%的乳化率。该体系能有效将岩心表面接触角从109°降至47.9°，实现由亲油至亲水的润湿反转，显著降低原油黏附功。岩心驱替实验进一步表明，复配体系能显著提高原油采收率，在水驱基础采收率约30%的条件下，可将其提升至60.83%。此项研究为高矿化度、低渗透油藏的化学驱提供了一种高效驱油表面活性剂体系和技术途径。

关键词: 阴-非离子型表面活性剂, 提高采收率, 界面张力, 润湿性, 配伍性

Abstract:

To solve the problems of poor salt tolerance and insufficient interfacial activity of surfactants in chemical flooding for high-salinity reservoirs, in this work, a novel anionic-nonionic surfactant, C12P6E6PS, was designed and synthesized, and then it was blended with a laboratory-synthesized betaine-type Gemini surfactant （GCS12）. The properties of the surfactant mixture, including solubility, interfacial activity, emulsification performance, wettability-altering ability, and oil displacement efficiency, were systematically evaluated. The results showed that the mixed system with n （C12P6E6PS） /n （GCS12） of 2∶1 exhibited significant synergistic effects, achieving ultralow interfacial tension （as low as 0.007 mN/m） within the high-salinity range （150-200 g/L） and maintaining an emulsification rate of 64% even at the salinity of 12% NaCl. This system could effectively reduce the contact angle from 109° to 47.9° on rock surfaces, changing the wettability from oil-wet to water-wet and significantly decreasing the adhesion work between crude oil and rock surface. Core flooding experiments showed that the mixed system could significantly enhance the oil recovery, i.e., after flooding by water （indicative of an oil recovery of approximately 30%）, the oil recovery was further increased to 60.83%. This study might provide an efficient technical approach for chemical flooding in high-salinity low-permeability reservoirs.

Key words: anionic-nonionic surfactant, enhanced oil recovery, interfacial tension, wetting ability, compatibility

中图分类号:

TQ423

李政雨,邢德钢,郑延成,赵洪运,由福昌. 十二烷基嵌段聚醚磺酸钠与甜菜碱Gemini表面活性剂复配体系的协同驱油性能[J]. 日用化学工业（中英文）, 2026, 56(3): 284-292.

Zhengyu Li,Degang Xing,Yancheng Zheng,Hongyun Zhao,Fuchang You. Synergism in the mixture of sodium dodecyl block polyether sulfonate and Gemini betaine surfactant for oil displacement[J]. China Surfactant Detergent & Cosmetics, 2026, 56(3): 284-292.

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T/℃	体系	w （NaCl） /%
T/℃	体系	0.5	1	5	7	10	15	20	25	30
30	GCS12	-	-	-	-	+	+	++	++	++
	C12P6E6PS	-	-	-	-	-	+	+	++	++
	n （C12P6E6PS） /n （GCS12） =2∶1	-	-	-	-	-	-	-	+	+
	n （C12P6E6PS） /n （GCS12） =1∶1	-	-	-	-	-	-	-	+	+
	n （C12P6E6PS） /n （GCS12） =1∶2	-	-	-	-	-	-	+	+	+
80	GCS12	-	-	-	-	-	-	-	+	+
	C12P6E6PS	-	-	-	-	-	-	-	-	+
	n （C12P6E6PS） /n （GCS12） =2∶1	-	-	-	-	-	-	-	-	-
	n （C12P6E6PS） /n （GCS12） =1∶1	-	-	-	-	-	-	-	-	-
	n （C12P6E6PS） /n （GCS12） =1∶2	-	-	-	-	-	-	-	-	-