The emission spectra were used to determine the abundances of 18 trace elements contained in 75 crude oil samples and 360 source-rock samples from six strata of the Ordovician. Permo-Carboniferous and Paleogene of the Baxian Sag of the Jizhong Depression

Hebei Province

and 14 abundance ratios are calculated by the author. Based on these data

this paper made an oil-oil correlationby cluster analysis and established a discriminant funtion of source rocks by dis-criminant analysis

and made an oil-source rock correlation by secondary discri-minant analysis. The result shows that the Tertiary crude oil comes from Eogene source rocks; the Permo-Carboniferous condensate and light oil are from C-P coalseries; a part of Ordovician light oil is from C-P source rocks and the rest arefrom the Eogene.