Abstract: Through experimental study of development formula for heavy oil reservoir binary compound flooding in Dong-4 and Dong-5 blocks of Shangdian oilfield,as well as the compatibility study of surface-active agent and polymer types,the polymers and surfactants suitable for the block has been screened out.Through simulating the formation conditions,the effect of injected concentration and injected slugs on EOR has been analyzed and the dibasic acid co-driven formula appropriate for Shangdian oilfield has been determined.