关键词: 聚合物微球, 深部调驱, 段塞工艺, 注入次序及比例, 注入方式

Abstract: Since polymeric microspheres have the ability of indepth profile control, nanopolymeric microspheres and coreshell macadam microspheres were chosen as the materials in the experiments. The slug injection, the order and ratio of the two different polymeric microspheres, and the ways of injection were systematically optimized. The experiment results show that compared with the highconcentration with shortslug and the lowconcentration with longslug, the midconcentration with midslug combined the above advantages, which can obtain a relatively more steady oil recovery ratio during a proper time. Utilization efficiency can be improved by injecting the coreshell macadam microspheres before injecting nanopolymeric microspheres during indepth profile control, and the best ratio is 1∶1 under the experiment conditions. The microspheres can be distributed more widely in the floor using interval injection, which is favorable for continued growth of oil recovery continually .

Key words: Polymeric microsphere,     ,  Indepth profile control,    ,  Slug injection,   ,  Injection order and ratio,   ,  Injection way