Abstract: In high water cut state,the distribution of remaining oil becomes more and more complex,resulting in more and more difficult to the maintenance,the stable production and the production adjustment.Therefore,it is significant to forecast the distribution pattern of remaining oil to ensure a stable output of oil field.In terms of the structure,the physical property the waterflooding situation of No.437 fault block in Shuanghe oilfield,key factors to affect the dis- tribution of remaining oil are analyzed.The numeral simula- tion analysis method is utilized to study the distribution pat- tern of remaining oil,which provides necessary references and assurances to formulate the next development plan and enhance the potentials of the pools.