A novel method to calculate the increasing rate of water cut in water flooding oil reservoirs

Zhang Hongyou; Wang Yuejie; Wang Meinan; Deng Qi; Zhang Yanhui

doi:10.1080/12269328.2023.2182370

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자료유형: 학술저널

저자정보: Zhang Hongyou (Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch China Limited Tianjin China) Wang Yuejie (Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch China Limited Tianjin China) Wang Meinan (Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch China Limited Tianjin China) Deng Qi (Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch China Limited Tianjin China) Zhang Yanhui (Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch China Limited Tianjin China)

저널정보: 한국자원공학회 Geosystem Engineering Geosystem Engineering Vol.26 No.3

발행연도: 2023.6

수록면: 67 - 74 (8page)

DOI: 10.1080/12269328.2023.2182370

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In this paper, a new method for studying the theoretical water cut increasing rate of water flooding reservoirs is proposed based on the correction of the traditional fractional flow equation. First, the stream tube model was used to solve the saturation distribution field of reverse nine-point injection-production well pattern. Second, through analyzing the saturation results, the linear formula between the average water saturation of the reservoir after water breakthrough and the water saturation at the outlet was established for the first time. Then, based on the linear formula, the traditional fractional flow equation was corrected and a new method was proposed. Finally, the proposed method was applied to Bohai S oilfield to demonstrate its accuracy and practicability. On the one hand, the results show that compared with the traditional fractional flow equation method, the prediction accuracy of the proposed method has increased from 80% to more than 92%. On the other hand, the application of the new method effectively evaluates the development effect of oilfields with high water cut and guides formulation of reasonable adjustment measures.

#Water cut increasing rate #fractional flow equation method #stream tube method #average water saturation #outlet water saturation

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