最佳中相微乳液驱油体系研究  

Research on middle phase microemulsion system for flooding

作　　者：周冰灵[1] 杨俭 张静[3] 李新发[3] 杨震[3] 

机构地区：[1]东北石油大学提高采收率教育部重点实验室,黑龙江大庆163318 [2]中石油煤层气有限责任公司临汾分公司,山西临汾042200 [3]中石油玉门油田公司,甘肃酒泉735019

出　　处：《化学工程师》2016年第3期56-59,共4页Chemical Engineer

摘　　要：微乳液驱油是提高油藏采收率的有效方法,关键因素在于微乳液可以使原油驱替液的界面张力降低到10^(-3)~10^(-4)m N·m^(-1)的超低水平,并使原油在盐水中的增溶量达到最大值。采用拟三元相图法,筛选出了SDS表面活性剂、正丁醇、K_m=1.5,其增溶性较好,试剂消耗量最少;应用正交实验获得了制备最佳中相微乳液驱油体系配方,并分别对SDS浓度、正丁醇浓度和Na_2CO_3浓度进行了扫描,得到的体积相图和增溶参数图,得出:V_o=V_w,SP_o=SP_w,体系达到了最佳中相。该体系可作为"三采"中的驱油剂,用于提高油藏采收率。Microemulsion flooding is an effective approach to improve reservoir recovery, and the key factor lies that microemulsion can lower the interfacial tension of crude oil and displacing fluid to 10^（-3）~10^（-4）m N·m^（-1）, and make the maximum solubilization of crude oil in the salt water. Using the pseudo ternary phase diagram method to Select the surfactant SDS, n-butyl alcohol, K_m =1.5, its good solubility, reagent consumption minimum; Using or-thogonal experiment, we obtain the preparation of middle phase microemulsion formula of oil displacement system.Scanning respectively SDS concentration, concentration of n-butyl alcohol and Na_2CO_3, we get the volume of the phase diagram and dissolve parameters figure. It can be seen： V_o=V_w, SP_o=SP_w, and achieved the best phase system.The system can be used as oil displacement agent, used to improve reservoir recovery efficiency.

关 键 词：微乳液 采收率 增溶性 界面张力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]