复合碱三元体系与含CO_2二类油层适应性研究  

Adaptability of ASP System with Composite Alkali to the Second-Class Reservoirs Containing CO_2

作　　者：李柏林[1] 杨凤艳[1] 张莹莹[1] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318

出　　处：《石油化工高等学校学报》2014年第3期81-86,共6页Journal of Petrochemical Universities

基　　金：黑龙江省自然科学基金重点项目(ZJG0507)

摘　　要：针对大庆北一区断东二类油层强碱三元复合驱现场试验,分析了试验区中心井伴生气中CO2含量的变化趋势以及和三元液的化学作用规律,研究了氢氧化钠和碳酸钠复配三元体系的界面张力、黏度特性、驱油效率。其中HPAM质量浓度2 000mg/L、重烷基苯磺酸盐质量分数0.3%、氢氧化钠质量分数0.8%、碳酸钠质量分数0.4%组成的复合碱三元体系(简称F21)综合性能较优。复合碱(F21)三元体系2h的平衡界面张力低至6.5×10-3mN/m;复合碱(F21)三元体系的黏度比强碱体系增加28.5%,且三元体系黏度随复合碱强度减弱而升高;复合碱(F21)三元体系比水驱采收率提高24.4%,和强碱体系化学驱采收率接近;非均质模型化学驱采收率比均质模型降低2.4%。For the industrial field test of ASP flooding containing NaOH in second-class reservoir which located in the east fault of Daqing north No. 1 Zone, the variation trend of CO2 content in the center oil well associated gas and the chemical interaction law of ternary system was analyzed. Interracial tension, viscosity and oil displacement efficiency of the composite ternary system which consisted of sodium hydroxide and sodium carbonate were studied. Ternary system of composite alkali （F21 for short）which was composed of HPAM concentration of 2 000 rag/L, HABS mass fraction of 0.3%, sodium hydrate mass fraction of 0.8%0 and sodium carbonate mass fraction of 0.3 % had a better comprehensive performance. Its equilibrium interracial tension at 2 h was as low as 6.5×4 10-a mN/m. Its viscosity increased by 28.5%compared with strong alkali system and rised as intensity of composite alkali decreased. Recovery ratio of ternary system of composite alkali（F21 for short） improved by 24.4%compared with water flooding which was similar with strong alkali system chemical flooding. Recovery ratio of heterogeneous model chemical flooding decreased by 2.4% compared with homogeneous model.

关 键 词：三元复合驱 复合碱 界面张力 黏度 驱油效率 非均质模型 

分 类 号：TE357[石油与天然气工程—油气田开发工程]