Abstract: Songliao peripheral basins are characterized by low level unbalanced exploration and complicated geological conditions, but with better resource bases. Because of the different characteristics of strata development and structural evolution of different basins, basins in the area are classified into two categories---successor basins and remnant basins. Moreover it is pointed out that the basins are distributed with regularity. Based on this, the hydrocarbon generation, accumulation, and reservoir-forming conditions of the main basins in the study area are analyzed. Successor basins are proved to have favorable prospects for exploration. At last suggestions of "laying emphasis on succession, strengthening preparatory work for oil and gas exploration, and deepening comprehensive study on Songliao peripheral basins" are proposed. Attention should be paid on deep exploration of successor basins featuring in low level exploration.

Key words: Songliao peripheral basins, structural evolution, oil/gas prospects, basin group