Zilaitun 21 fault block production speed is low (0.43%), low recovery degree (16.2%), the remaining recoverable reserves of underground geologic is rich (20 tons), with the potential for mining, but this fault block in high water cut and low permeability, the stage of heavy oil reservoir porosity, using conventional dynamic analysis method of remaining oil distribution is not clear, finally we applied reservoir numerical simulation method for dates and fault block on the distribution of remaining quantitative research and development adjustment plan. Key words: heavy oil reservoir，high water cut， remaining oil distribution, simulation