双子表面活性剂对海上S油田稠油降粘性能评价  

Evaluation of Gemini surfactant for viscosity reduction of heavy oil in offshore S oilfield

作　　者：王大威[1,2] 张健[1,2] 吕鑫[1,2] 何春百[1,2] 李强[1,2] 谭业邦 

机构地区：[1]海洋石油高效开发国家重点实验室,北京100027 [2]中海油研究总院,北京100027 [3]山东大学化学与化工学院,山东济南250100

出　　处：《油气地质与采收率》2015年第4期109-113,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"海上稠油化学驱油技术"(2011ZX05024-004)

摘　　要：针对海上S油田地层中胶质和沥青质含量高、稠油粘度大和水驱采收率低的问题,采用双子表面活性剂RB107对S油田稠油进行降粘实验,评价其乳化浓度、聚集形态、界面活性、润湿性和稳定性等,在此基础上通过物理模拟驱油实验考察其驱油性能。结果显示:在油藏条件下,当质量分数为0.3%、油水体积比为50∶50时,可使稠油粘度降低97%,使油水界面张力降至0.165 6 m N/m,说明双子表面活性剂RB107在较低浓度下具有较强降粘性能和界面活性;乳化速度为0.24 m L/min,油水乳状液油珠分散均匀且直径小,说明RB107具有较快的乳化速度和较强的稳定性;RB107溶液与原油基底的接触角为10.8°,说明对油水界面具有较强的润湿性;其可在水驱的基础上提高采收率10.1%,说明RB107对S油田稠油具有良好的降粘效果,可作为S油田稠油的降粘剂。Viscosity reduction experiments of new Gemini surfactant RB107 was done to solve the problems of high content of colloid and asphaltenes in formations,high viscosity of heavy oil and low recovery efficiency of water flooding in offshore S oilfield. Emulsion concentration,aggregation morphology,interfacial activity,wettability,stability and other properties of the surfactant were evaluated and its oil displacement performance was investigated through physical simulation experiment. When mass fraction is 0.3% and oil-water volume ratio is 50∶50,the viscosity of the heavy oil may be decreased by97% and oil-water interfacial tension may be dropped to 0.165 6 m N/m under the condition of oil reservoir. The results show that RB107 has strong performance of viscosity reduction and interfacial activity under low concentration. RB107 also has fast emulsification speed(0.24 m L/min)and strong stability with uniformly dispersed oil-water emulsion droplets of small diameter. Contact angle of RB107 solution was 10.8° on oil base,which shows that RB107 has a strong wettability on the oil-water interface. Compared with water flooding results,physical simulation results of RB107 could enhance the oil recovery by 10.1%. RB107 could be the viscosity breaker of the heavy oil in S oilfield for its good viscosity reduction effect.

关 键 词：稠油 双子表面活性剂 乳状液 乳化降粘 采收率 海上S油田 

分 类 号：TE357.432[石油与天然气工程—油气田开发工程]