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Recovery factor is the most important comprehensive index to measure oilfield development effect and development level. Starting from the production history data of development indicators and influencing factors, this paper mainly evaluates the oilfield development effect from the transient perspective of recovery factor. The results show that the current recovery rate is higher but the recovery factor is lower. Mathematical methods such as gray correlation analysis and reservoir engineering principles analyze the main factors that affect oil recovery and oil recovery rate. According to the current recovery factor determined by the dynamic method according to the determined typical block, compared with the similar typical block, the four influencing factors are analyzed longitudinally from the historical change trend, and the next step to improve the recovery rate of the block is given. Main adjustment countermeasures. The proposed method and analysis results have certain reference value for the theoretical research and practical application of the development of ultra-high water cut oil fields.

Study on the main influencing factors of oil-flood recovery factor of oilfield in extra-high water cut period