Abstract: Correct division of reservoir flow units has vital significance for forecasting the remaining oil distribution, adjustment of development plan, enhancing the recovery ratio, ect. The unified multi-parameter cluster analysis and fuzzy quality synthetic evaluation have been used for the division of reservoir flow units. Based on the division of flow unit, the plane distribution of flow units has been forecasted using the BP networking. The research indicated that reservoir flow units of the research area can be divided into four types. Type I is the best. There are some wells still have certain productivity, although the development degree is high and most of the wells are already closed; Type Ⅱ is better, it is the current primary area for oil production which has lower flooding degree and has certain remaining oil. Type Ⅲ is worse, which has commonly development effect and has been poorly produced. it is the potential tapping area in oilfields; Type Ⅳ is the worst, which has poor original oil-bearing saturation, it is not the primary area for distribution of remaining oil. Detailed analysis has been carried out to study the characteristics of each kind of flow unit, which provides detailed geological basis for synthetical control of the oil field.

Key words: Jin 45 block oilfield, reservoir flow units, cluster analysis, BP net technique, integrated fuzzy judgment, oil fields