Abstract: The final aim of reservoir researches is the classification and evaluation of reservoirs in accordance with geological reality.The classification and evaluation will directly guide the oil and gas exploration and development,so the result of reservoir evaluation always is central point of all researchers.With the overview of the present reservoir evaluations home and abroad as well as the author's own practical researches,this paper summarizes eleven kinds of reservoir evaluation methods such as geological empirical approach,weighted analysis,analytic hierarchy process,fuzzy mathematics,artificial neuron of neural network method,fractal geometry,variation function,cluster analysis methodology,gray correlation method,logging methods and seismic techniques.When discussing the advantages and disadvantages of these methods,the paper suggests that the data selection,the evaluation parameter selection and the rational confirmation of the evaluation results should be key points in the reservoir evaluation.At the same time,the paper points out the problems and the development directions of reservoir evaluation researches.