Abstract: The analytical hierarchy process is selected to determine the weight coefficient,and an overall quantitative evaluation is carried out for the reservoir with the low permeability reservoir in Chaoyanggou oilfield.According to the cumulative probability curve,the evaluation results are classified into three categories,and the results are coincident with the characteristics of the reservoir with low permeability in Chaoyanggou oilfield.The overall quantitative evaluation of reservoir has solved the diversity of evaluation results in the process of single factor evaluation.This evaluation method provides the favorable basis for the development of reservoir with low permeability in Chaoyanggou oilfield.