All kinds of property of oil reservoir that have definite single or multiple dynamics implications reflect accumulating dynamics. The oil reservoir quantitative feature exactly exhibits the type and quantitative feature of accumulating dynamics. It has close relationship between oil column, reservoir pressure, oil saturation and dynamics. Oil reservoir type is different from trap type because of accumulating dynamics. It is the relationship between evolution of different zones and reservoir types in basin. It macroscopically displays the feature and evolution of basin. Based on the property and evolution of oil reservoir, we classified the accumulating system,and deeply analyze the manifestation of accumulation dynamics, resistance, replacement and accumulation, and then establish the oil reservoir forecasting mode base of basin accumulation dynamics environment and trap type distribution feature.