Abstract: The reserves of oil and gas reservoirs can be divided into the proven reserves, controlled reserves and predicted reserves according to the different stages of understanding the oil and gas reservoirs. Prediction study of the proven oil and gas reserves growth trend is the basis for the oil companies to formulate the strategies for reasonable increase of the reserves and production as well as exploration and development. In the opinions of the authors, the scientific methods should be adopted to reasonably predict and estimate the future trend on the basis of the available geological information. It is necessary to analyze and study the source of the newly additional proven reserves, the conversion of the controlled and predicted reserves and the prediction method for the newly additional proven reserves so as to achieve the satisfactory results. This method can be used as reference for the departments in charge of exploration and development