Abstract: Southern Dagang oilfield consists of many reservoir types,and different blocks are in various stages of development.The difficulty of stable production is increasing year after year.The best adjustment of the exploitation plan is analyzed in the different stages of water cut from low to high.Based on stable production limits, injection-to-production-well ratio,oil recovery rate,liquid withdraw rate,limited water cut,limits of economic output and optimization of injection-production pattern,development potential and existing crisis of different reservoirs are studied.Then,corresponding technical countermeasures are put forward in the paper.This paper has an important referential significance for the efficient development of reservoirs in the different stages of exploitation.