Abstract: In view of the present situation of many influencing factors，difficult evaluation and weak reservoir research in Fudong slope area of Junggar Basin，the Jurassic Toutunhe Formation in Fudong slope area is taken as an example to analyze the petrological and physical characteristics of samples in the study area. Firstly，analyze core data and establish a logging porosity physical property interpretation model. The porosity，mud content，mudstone thickness，microfacies type，sand/gravel ratio and sandstone thickness are selected as reservoir evaluation factors，and the reservoir evaluation model of Jurassic Toutunhe Formation in Fudong slope is established. The grey system theory is used to select the mother-child sequence and calculate the correlation coefficient and correlation degree，and then the weight coefficient of the evaluation parameters is obtained. The inflection point method is used to determine the classification threshold of reservoir comprehensive evaluation，and the reservoir classification standard is clarified to realize the reservoir evaluation of Jurassic Toutunhe Formation in Fudong slope area. The production test shows that the evaluation results are in good agreement with the actual productivity of oil and gas，indicating that the reservoir characterization evaluation method based on pore model and grey theory is effective.

Key words: grey theory, pore model, reservoir evaluation, Toutunhe Formation