三元复合驱填砂管实验中表面活性剂性能

PERFORMANCES OF THE SURFACTANT IN SAND-FILLED TUBE EXPERIMENT OF ASP FLOODING

针对天然岩心长度短、人造岩心难以模拟油层条件问题,采用具有4个取样点的天然岩心填充长管模型,在室内开展了三元复合体系中表面活性剂在多孔介质运移过程中质量分数、组成和超低界面张力作用距离等性能变化规律研究。结果表明:与聚合物和碱损耗相比,表面活性剂在多孔介质中损耗最大,表面活性剂组成中相对分子质量较小成分优先吸附,在超低界面张力作用距离不足模型长度60%的条件下,对表面活性剂性能改善和三元复合驱配方优化具有重要的指导作用。

In the light of the problems of short natural core and difficult-to-simulate synthetic cores for the condi- tions of the oil reservoirs, the natural core-filled long tube model with four sampling points is adopted to carry out the following indoor studies of the changed laws in the course of the porous media migration for the surfactant in ASP complex system ： mass fractions, compositions, acting distances of ultra-low interfacial tension and other prop- erties. The results show that comparing with the losses of the polymer and alkali, the loss of the surfactant in the porous media is most serious and relative small molecular mass components in the surfactant are preferential!y ad- sorbed, under the condition of the acting distance of the ultra-low interracial tension short 60% of the length of the model, the guiding actions in the improvement of the surfactant performances and the formula optimization of ASP flooding can be realized.