Due to the small space of offshore platforms and the shortage of fresh water resources，traditional powder polymer and its injection allocation are difficult to be widely applied in offshore oilfield. The emulsified polymer gel and polymer microsphere agent have the dual functions of profile control and oil displacement，which has been successfully applied in some offshore oilfield platforms. In order to further clarify the law of deep migration of profile control agents，the micro structure observation and static evaluation of emulsified polymer gel，core-shell microsphere and their composite systems were carried ont. Based on the evaluation results，the dynamic blocking experiments of 1 m and 10 m sand pipes were conducted to evaluate the effect of different profile control agents. The results showed that the structure grid of the composite agent was thicker. The core-shell microsphere was embedded in the gel grid，which made the network interweaving structure of the single layer be thicker and the gel strength be higher. Meanwhile，the breakthrough pressure of the subsequent water flooding was the highest in the long-distance migration process of the composite agent. The breakthrough pressure of 2.975 m reached 8.01 MPa，moreover，the blocking rate of the majority of the measuring points along the path was more than 90%. It indicated that the blocking performance of the composite system was better than that of the single system. The study of long-distance transport characteristics of online composite profile control agents could provide technique solution and theoretical guidance for the evaluation of deep profile control agents in offshore oilfield.