When it comes to the late phase of field development, challenges will be faced such as insufficient new proven reservoir replacement, reduced recoverable resources, increased exploitation difficulty and higher production cost. To achieve the goal of steady production, production increase and reasonable use of resources, some EOR methods like fracturing, water injection and gas lifting will be used with the wells. With cost proportion of EOR increasing year by year, it is important to evaluate the effect of EOR activities. With MPFM, the well performance and behavior can be monitored in a continuous, real time mode before, during and after the EOR operations and the effect of EOR can be evaluated.