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The C oilfield is a bottom water reservoir with locally developed stable interlayers. It is a bottom water reservoir with overall bottom water displacement and locally edge water displacement under complex displacement. The development method adopts a three-dimensional development model of bottom-up, and after long-term development, the distribution of remaining oil is very complex, not a simple water ridge pattern. By analyzing the remaining oil patterns of bottom water reservoirs with different reservoir characteristics, fluid properties, and well network conditions. Considering five influencing factors, including interlayer, crude oil viscosity, production rate, oil column height, and reservoir permeability, numerical simulation is conducted to study the bottom water coning characteristics and remaining oil distribution patterns and mechanisms under different influencing factors. At the same time, based on the actual reservoir model, summarize the distribution pattern and rules of remaining oil, providing direction for the next step of tapping the potential of the oilfield.

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Analysis of Influencing Factors and Distribution Patterns of Residual Oil During the Ultra-high Water Cut Period in the C Oilfield

  • 会议论文

  • 发表日期：

    2025年

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  • Jie Tan,
  • Jian-bo Chen,
  • Ting-li Li,
  • Peng-fei Mu,
  • Di Wang

摘要

The C oilfield is a bottom water reservoir with locally developed stable interlayers. It is a bottom water reservoir with overall bottom water displacement and locally edge water displacement under complex displacement. The development method adopts a three-dimensional development model of bottom-up, and after long-term development, the distribution of remaining oil is very complex, not a simple water ridge pattern. By analyzing the remaining oil patterns of bottom water reservoirs with different reservoir characteristics, fluid properties, and well network conditions. Considering five influencing factors, including interlayer, crude oil viscosity, production rate, oil column height, and reservoir permeability, numerical simulation is conducted to study the bottom water coning characteristics and remaining oil distribution patterns and mechanisms under different influencing factors. At the same time, based on the actual reservoir model, summarize the distribution pattern and rules of remaining oil, providing direction for the next step of tapping the potential of the oilfield.