Abstract: The process from hydrocarbon generation to extinction for an oil-gas reservoir is related with its geological history, geological processes and artificial development. Artificial development will speed up oil and gas depletion; the development life of oilfields is influenced by diverse exploitation methods and technologies, and can be effectively extended by the constant innovation and application of new methods and technologies, and the increase in geological and recoverable reserves. This paper discusses the actual exploitation according to the characteristics and contradictions at different recovery stages in Sabei development zone in Daqing Oilfield, focusing on enhancing the recovery percentage of oil reserves. Specifically, the following oil recovery techniques are applied:secondary recovery dominated by early water-injection, separate zone production and infilling adjustments, tertiary recovery dominated by polymer flooding and alkali/surfactant/polymer (ASP) flooding, and quaternary recovery after chemical flooding dominated by self-adapting recovery system With the increasing improvement in the exploration and development technologies in future, geological and recoverable reserves will be increased. Based on Weng's prediction model and the mathematical model of skewed normal distribution, it is estimated that the development life of the Sabei development zone can be extended beyond 2110.