Abstract: In order to improve development of Wa 16 block injected water developing thin oil reservoir and oil recovery,consid-ering the formation conditions of the block and fluid property,laboratory research and field test of heterogeneity reservoir have been carried out,which verified the feasibility of the technology to ordinary thin oil reservoir.The experiment proved that this combination oil flooding system has better thermal stability and compatibility.Laboratory displacement experiment mensuration shows it can improve oil displacement efficiency of more than 15% than conventional water flooding with low cost,which increase yield relatively and provided new technical support to improve the effect of water flooding development.