Abstract: A new approach utilizing fluorescence scanning technique to analyze adsorbed hydrocarbons and non-hydrocarbons,identify oil inclusion and fluorescence fingerprint was introduced,and the Hailaer Basin was selected as a case study.Totally 18 samples collected mainly from Mesozoic clastic rock reservoir from the basin were chosen to perform QGF-E (Quantitative Grain Fluorescence on Extract) and QGF (Quantitative Grain Fluorescence)analysis.It was proved that the experimental procedure of QGF-E and QGF analysis is a simple,quick and low cost way.The results of QGF-E showed that the intervals where the samples were collected were once to be pathways of oil migration and/or transited carrying bed of hydrocarbons.The results of QGF indicated that only a little oil inclusions were formed in the reservoir analyzed for some reasons.This study suggests that QGF-E and QGF are able to readily delineate current and paleo-oil column,oil migration pathway,current oil-water and residual oil-water contacts as well as identifying existence of oil inclusions,which would be helpful in reconstructing process of hydrocarbons accumulation.