In order to further improve the recovery rate of DS ultra-low permeability oil field after water flooding development in the Ordos Basin,a new type of sulfonate gemini surfactant 14-1-14 suitable for ultra-low permeability oil fields was developed,and its interfacial activity,wetting performance,anti-swelling performance,and pressure reducing and injection increasing effect were evaluated.The results show that this gemini surfactant has excellent interfacial activity,which can reduce the interfacial tension between oil and water to the order of 10-3mN·m-1;In addition,the gemini surfactant also has good wetting change ability and anti-swelling performance;When the concentration is between 0.05wt％and 0.5wt％,injecting a 14-1-14 gemini surfactant solution,the highest depressurization rate can reach 28.92％,and the highest increase in water phase permeability is 23.09％.The above experimental results indicate that 14-1-14 gemini surfactant has good prospects for promotion and application in improving the recovery rate of ultra-low permeability oil fields.
关键词
双子表面活性剂/润湿性能/防膨性能/降压增注/采收率
Key words
gemini surfactants/wetting performance/anti-swelling performance/reduce blood pressure and in-crease injection/recovery rate
维普
万方数据