Abstract: By means of pyrolysis analysis on reservoirs,not only their oil possibility can be discriminated,but also their produced liquid properties be described.In this paper,the area to the west of Changyuan,Daqing in the North Songliao Basin is taken as the major study area.Using pyrolysis analytical parameters combined with physical properties,oil-bearing thickness and oil-testing data,it is suggested that reservoir produced liquid properties can be discriminated by pyrolysis parameters together with effective porosity (O_e) and production capacity be predicted by pyrolysis parameters together with oil-bearing thickness.