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- W4366144489 abstract "The continuous growth of recoverable reserves in a waterflooding oilfield has a significant impact on the patterns of production evolution. A new production evolution model is established by improving the Weng Cycle model. With the new model, the statistical correspondence between the production decline stage and the reserve-production imbalance is clarified, and the correlation of water cut with the recovery percent of recoverable reserves is discussed, providing quantitative basis of reservoir engineering for dividing development stages of oilfield and defining mature oilfields. According to the statistics of oilfields in eastern China, the time point corresponding to the reserve-production balance coefficient dropping to less than 1 dramatically is well correlated the beginning point of production decline, thus the time when the reserve-production balance coefficient drops dramatically can be taken as the initiation point of production decline stage. The research results show that the water cut and the recovery percent of recoverable reserves have a good statistical match in the high water cut stage, and it is more rational to take both the start point of production decline stage and the water cut of 90% (or the recovery percent of recoverable reserves of 80%) as the critical criteria for defining a mature oilfield. Five production evolution patterns can be summarized as follows: growth—peak plateau—stepped decline, growth—stepped stabilizing—stepped decline, growth—stepped stabilizing—rapid decline, growth—peak plateau—rapid decline, and growth—continuous decline." @default.
- W4366144489 created "2023-04-19" @default.
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- W4366144489 date "2023-04-01" @default.
- W4366144489 modified "2023-09-25" @default.
- W4366144489 title "Production evolution patterns and development stage division of waterflooding oilfields" @default.
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- W4366144489 doi "https://doi.org/10.1016/s1876-3804(23)60398-2" @default.
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