1 Research Institute of Exploration and Development, Jilin Oilfield Company, CNPC, Songyuan 138000, Jilin, China; 2 College of Earth Sciences, Jilin University, Changchun 130061, China

The southern central paleo?uplift belt of the Songliao Basin has favorable conditions for oil and gas accumulation, which is one major region of risk exploration of oil and gas in Jilin oilfield. Based on core and thin section observation, logging data analysis, porosity and permeability test and 3D seismic interpretation, along with a large number of statistical analysis and geological researches, the authors discuss the characteristics of basement rock reservoir and hydrocarbon accumulation models in the southern part of the central paleo?uplift belt, and propose three cognitions: ①the basement is mainly composed of granite, granodiorite, diorite, schist, mylonite, met? amorphic sandstone, andesite, tuff and limestone, of which granite, granodiorite, andesite and schist are the dominant lithologies for reservoir formation; ②the main reservoir space of basement rock is fractures and dissolutionpores, and the reservoirs are mainly developed in weathering leaching layer and fracture layer of weathering crust on the top of basement rock; ③ the oil and gas reservoirs of basement rock can be divided into three types of accumulation models: near?source gentle slope overlap, near?source steep slope docking (forward docking and reverse docking) and in?source drape (fault?order drape and anticline drape). The exploration direction of oil and gas reservoirs of basement rock in the southern central paleo?uplift belt is further clarified, which provides theoretical support for the prediction of favorable target areas.