为研究聚合物微球调驱对采出液的影响，加深聚合物微球调驱增产机理的认识，开展长庆油田特低渗、超低渗、低渗等主力油藏典型区块的采出液分析以及调驱前后标准岩心物性变化分析研究。通过分析调驱前后采出液中原油族组成、采出水中K⁺、Na⁺、Ca²⁺、Mg²⁺、和水含量变化，总结其中的变化规律。此外，通过润湿角测试及岩心驱替试验对聚合物微球调驱前后标准岩心的润湿性、渗透率及孔隙度进行了分析。结果表明，在各典型区块注入聚合物微球后，原油中饱和烷烃含量均减小，非烃含量均增加，含水量均明显降低，采出水矿化度均有所增加。经聚合物微球调驱后，亲水岩心的接触角有所变大，向着中等极性方向转变；亲水岩心不同渗透率岩心的渗透率和孔隙度均有所减小；不同渗透率的岩心渗透率和孔隙度变化显著程度的顺序为：特低渗>超低渗>低渗。通过上述研究进一步明确了聚合物微球在储层中主要发挥“堵”的作用，通过扩大注入水的波及体积来动用剩余油，为长庆油田调驱增产提供了理论依据。

In order to study the effect of polymer microsphere profile control and flooding on produced fluid and deepen the understanding of the profile control and flooding mechanism of polymer microsphere, the produced fluid in typical blocks of major reservoirs such as ultra-low permeablity, super-low permeablity and low permeablity in Changqing oil field were analyzed and studied. After using gravity separation and centrifugal separation methods to obtain crude oil and produced water, the changes in the composition of crude oil group, K⁺, Na⁺, Ca²⁺, Mg²⁺, ions, and water content in the produced water before and after profile control were analyzed, and the variation patterns were summarized. The results show that after injecting polymer microspheres into each typical block, the saturated alkane content in the crude oil decreases, the non-hydrocarbon content increases, the water content significantly decreases, and the salinity of the produced water increases. Through the above research, it has been further clarified that polymer microspheres mainly play a "blocking" role in reservoirs, and residual oil is utilized by expanding the swept volume of injected water, providing a theoretical basis for the production increase of Changqing Oilfield through profile control and flooding.