Songliao Basin is an important continental petroliferous basin in our country.The world-class oil field Daqing Field is gestated in the north of the central depression.With the development of exploration and development,more and more researches have been done on reservoir sedimentology.Based on the study of the sedimentology of the main oil layers in the central depression area of Songliao Basin,this paper sum-marizes the characteristics of rocks,sedimentary environment and facies,provenance,depositional system and depositional model,the types of sedimentary facies and the control of sedimentary environment on sedi-mentary facies are defined,and the characteristics of delta sedimentary facies are discussed The main prove-nances of the central depression and the main methods and deficiencies of the current provenance research are clarified,and the types of the depositional system and the evolution process of the basin depositional model are also clarified.
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