Abstract: In recent years, the widely distributed Fuyu Oil Layer of low abundance has become a focus for increasing reserves in Songliao Basin. However, some features of the layer have seriously block the exploration progress, such as the poor reservoir conditions, the heterogeneity, the complex controlling factors and the difficulty to determine favorable areas of high abundance. By a detailed study on the reservoir geological conditions and the forecasting techniques of petroleum spatial distribution based on the integrated method of multiple factors, the controlling factors of the accumulation are confirmed, an effective discriminant analysis template is established, and the probability of exploration success in Zhaozhou-Chaoyanggou Area is predicted. Furthermore, the distribution of the oil and gas-rich region is studied by fractal simulation of petroleum abundance. The results reveal that the low-risk exploration area is mainly distributed in the Fanshentun Anticline, the Bohetai Nose Structure, the south of Zhaoyuan, the Zhaozhou Oilfield, and Zhou39-Zhou391 area in south of Zhaozhou Oilfield. Besides the discovered resources, the remaining resources are approximately 80 million tons and mainly enriched in the southern area of Zhaozhou Oilfield, the west of Bohetai Nose Structure and southern Zhaoyuan.

Key words: Songliao Basin, Fuyu Oil Layer, low abundance, risk, fractal simulation