Abstract：The dynamic analysis of oil reservoir is important both in theory and in practice. According to a comparison analysis, the faults of mini-oil layers on complex structures and the multi-faults of oil reservoir would make the production-injection relation of the oil and water wells and the block completion degree unclear and wouls even have thorny effects on the whole geological research. The dynamic analysis, a new approach of perfecting the comparison method on the oil layers is carried out for an example for the comparison analysis on the mini-oil layers of the western fourth section of the oil extraction area of Fuyu in Jilin oilfield in this paper. The multi-wells are analyzed to discover faults betimes by adopting conventional comparison on the oil layers and considering the position of the geological formation, the tendency of geological formation and the drilling geologic logging data. The analysis results of three-dimensional seismic data show that the drilling faults and the neighborhood fault wells are consistent basically with the comparison analysis on the mini-oil layers of 728 new wells, especially, the fourteen drilling meeting faultage wells from 1984. The comparison methods of the oil layers are further improved for the further development of oil fields to obtain the relationship between the production-injection of the oil and water wells, which may provide a guide for practical work in the oil field.