Fine Reservoir Description And The Research Of Remaining Oil Distribution Law Of Black 46 Block In Daqingzijing Area

After water flooding development many years for black 46 block in Daqingzijing area, the problems influencing development and stable production exposed. Firstly the effects of lithology and physical property and heterogeneity in reservoir lead to low producing degree of water flooding, such as poor physical property, serious interlayer heterogeneity, large permeability difference, strong dart-coefficient, large permeability variation coefficient, uneven separate layer water absorption, very different separate layer producing and injection water leaping along fracture direction in order to water cut rising fast for oil wells in fracture direction. Secondly the reservoir and interlayer description are not fine. There is a lot of interlayer between each layer and sandwiched sand body inside layers, affecting water injection uniformly boosting in the layer, which causes the large difference of absorption degree. The water flooding of main layers is serious, but poor for non-main layers, which affects the corresponding injecting-producing relation. Finally the remaining potential distribution should be further defined. Now many characteristics are shown, such as high water cut, low recovery degree. How to improve the development effect, controlling water cut rising velocity, fully tap the potential becomes the main problem to resolve for next work.Aiming at the existing problem, the dynamic analysis was carried out for the black 46 block combining dynamic material, based on layer contrast, sand body identification, the study of sedimentary microfacies and interlayer. Distinguish the well group to research to determine the corresponding relationship between oil and water wells and the sandbody connecting status, analysis the injection advantage direction. Use three-dimensional model to research the remaining oil distribution and characteristics. Then make detailed residual oil exploration schemes and forecast the effect by numerical simulation. At last select the best solution to guide the reservoir development.