烷基酚磺酸聚醚磺酸盐驱油剂的合成及表征

针对目前常规表面活性剂在高温高矿化度油藏环境下的使用缺陷,以烷基酚为起始剂,通过乙氧基化、氯代、磺化反应,在烷基酚苯环上引入磺酸根基团,同时对烷基酚聚醚的端羟基再次磺化,合成了烷基酚磺酸聚醚磺酸盐;用红外光谱对产物结构进行了表征;质量分数0.3%的所合成的表面活性剂模拟水溶液与胜坨二区原油间界面张力可达到10-3mN/m;耐盐性能达到30g/L,抗钙镁离子能力达到1g/L,耐温性能>90℃;通过室内物理模拟实验,二元复合驱(聚合物+所合成的表面活性剂)体系可提高采收率16.4%,且聚合物+表面活性剂体系能充分发挥协同效应。

Synthesis and Characterization of Alkylphenol Sulfonic Polyxyethylene Ether Sulfonate Displacement Agent

In view of imperfections of conventional anionic and non-ionic surfactants used for enhanced oil recovery,a new displacement agent was synthesized through ethoxylation,chlorination and sulfonation with alkylphenol as core.Structure of the product was characterized by IR.When the concentration of this surfactant is 0.3%,the interfacial tension between simulated water solution and the Shengtuo second zone crude reaches 10-3 mN/m order, the salt tolerance reaches 30 g/L,and the resistance to calcium and magnesium reaches 1 g/L.Temperature resistance is higher than 90 ℃.The laboratory physical simulation test shows that the bianry complex system (polymer+surfactant) can enhance the recovery ratio by 16.4%,while better synergistic effect of the system is obtained.