筛选驱油用表面活性剂方法初探  

Preliminary study of a method to screen surfactants for oil recovery

作　　者：王东方[1] 崔晓朵[1] 尹海峰[2] 梁玉凯[3] 张贵才[4] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015 [2]中国石化股份胜利油田分公司海洋采油厂,山东东营257237 [3]中国海洋石油总公司湛江分公司,广东湛江524057 [4]中国石油大学(华东)石油工程学院,山东青岛266555

出　　处：《油气地质与采收率》2011年第4期57-60,115,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家"863"项目"与蒸气吞吐结合的表面活性剂驱油体系研究"(2007AA06Z201)

摘　　要：为解决原油在表面活性剂溶液中乳化快慢程度难以表征的问题,自制乳化测定仪器,并提出了乳化速度的概念,对其测定条件及影响因素进行了考察,通过最终的驱油实验将乳化速度与最终采收率进行了关联。实验结果表明:单纯表面活性剂体系乳化速度都较低,适量加入碱剂可以大幅度提高表面活性剂的乳化速度;在模拟地层温度(40～60℃)条件下,温度越高,乳化速度越大,乳化效果越好;最大乳化速度分别对应着适当的表面活性剂质量分数和碱质量分数。室内驱油实验发现:对于高乳化速度体系(1.8mL/min),驱替达到含水率为98%时对应的注入孔隙体积倍数为4.5;而对于低乳化速度体系(0.2mL/min),驱替达到同样条件,注入孔隙体积倍数仅为3.5,高乳化速度体系能多提高最终采收率超过10%。The 'emulsification speed' is proposed to quantitatively indicate the emulsification degree of crude oil.The measurement conditions and affecting factors are checked,the emulsify speed and the ultimate recovery are correlated by oil displacement experiment.The results indicate that the emulsify speed is low in single surfactant systems,the addition of an appropriate amount of alkali can greatly increase the emulsify speed;at the condition of simulated reservoir temperature(40-60℃),the higher the temperature,the bigger the emulsify speed,and the better the emulsify effect.The highest emulsification speed corresponds to optimum surfactant and alkali concentrations.Oil displacement experiments show that the increment of emulsification speed is favorable to restrain the rise of water cut,and prolong the productivity period,and enhance the ultimate recovery.

关 键 词：乳化速度 表面活性剂 含水率 采收率 驱替效果 

分 类 号：TE357.432[石油与天然气工程—油气田开发工程]