Abstract: In view to the fact that reservoir analysis unique by single factor tends,according to selecting reservoir feature parameters,comprehensive classification evaluation has been made on the reservoir by using weight coefficient method.In order to avoid human factors influence of various evaluation parameters by previously adopting exert advice to determine weight coefficient,which caused big error to the evaluation result.This paper use analytic hierarchy process to determine the weight coefficient of every evaluation parameters.Use Y15 well as example to explain comprehensive classification evaluation of single well.On the basis of all single wells evaluation,a distribution chart of small reservoir classification evaluation is plotted.The evaluation result shows that the reservoir development better properties of Yageliemu formation,the main development reservoir are Ⅱ class and Ⅰ class reservoir.This has the very good consistency with the oil testing material and property analysis material of the study area.