中相微乳液驱油效果研究

摘要

Middle phase microemulsion flooding is an effective approach to improve reservoir recovery. Using orthogonal experiment, we obtain the preparation of middle phase microemulsion formula of oil displacement system. Scanning respectively SDS concentration, concentration of n-butyl alcohol and Na2CO3, we get the volume of the phase diagram and dissolve parameters figure. It can be seen: Vo=Vw, SPo=SPw, and achieved the best phase system. The middle phase microemulsion in the best and surfactant flooding experiment after water flooding to improve oil recovery were corstrast, the best middle phase microemulsion has obtained much better effects. The best middle phase microemulsion make the final residual oil saturation to 16.7%, the moisture content down to very low levels.%中相微乳液驱油是提高油藏采收率的有效方法。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Na2CO3浓度进行了扫描，得到的体积相图和增溶参数图，得出：Vo=Vw，SPo=SPw，体系达到了最佳中相；通过对比最佳中相微乳液和表面活性剂进行水驱后的提高采收率实验，最佳中相微乳液取得了良好的效果，使最终剩余油饱和度降到16.7%，含水率也降到很低程度。