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The waterflooding development performance of sandstone reservoir is affected by several geology and engineering factors. This research investigates the effects of reservoir heterogeneity, oil viscosity, water injection intensity and well spacing on sandstone reservoir waterflooding development, considering the changes of reservoir physical properties after long-term waterflooding by applying time-varying numerical simulations. By factor normalization and multiple regression methods, the relationship between recovery factors and four main controlling factors is established, and the weight coefficients of each parameter are obtained, the optimal injection-production parameters are further determined under different reservoir conditions. This study has certain guiding significance for the evaluation of waterflooding development and the production optimization of sandstone reservoir.

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Analysis and Optimization of Main Controlling Factors Affecting Oil Recovery of Sandstone Reservoirs After Long-Term Waterflooding

  • 会议论文

  • 发表日期：

    2025年

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  • Shanglin Liu,
  • Xuanran Li,
  • Anzhu Xu,
  • Lun Zhao,
  • Jincai Wang,
  • Jun Ni,
  • Shujun Han

摘要

The waterflooding development performance of sandstone reservoir is affected by several geology and engineering factors. This research investigates the effects of reservoir heterogeneity, oil viscosity, water injection intensity and well spacing on sandstone reservoir waterflooding development, considering the changes of reservoir physical properties after long-term waterflooding by applying time-varying numerical simulations. By factor normalization and multiple regression methods, the relationship between recovery factors and four main controlling factors is established, and the weight coefficients of each parameter are obtained, the optimal injection-production parameters are further determined under different reservoir conditions. This study has certain guiding significance for the evaluation of waterflooding development and the production optimization of sandstone reservoir.