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<p>In response to the issue of excessive reliance on subjective experience in determining indicator weights for remaining oil potential evaluation in high-water-cut oilfields, an evaluation model based on the combined weighting method and fuzzy comprehensive evaluation was developed. Appropriate evaluation indicators were selected by comprehensively considering remaining oil reserves and ease of extraction. The Analytic Hierarchy Process and entropy weight method were employed to calculate subjective and objective weights, respectively, and a fuzzy comprehensive evaluation model was established to assess remaining oil potential. Taking actual production blocks in the oilfield as the research subject, the evaluation results indicate that the overall potential of remaining oil in the production blocks is relatively limited. Multiple layers require further potential tapping through measures such as optimizing injection-production patterns, implementing refined water flooding, or applying tertiary oil recovery techniques. This evaluation model effectively reduces subjectivity in weight assignment, enhances the reliability of the evaluation results, and provides a scientific basis for assessing remaining oil potential and formulating corresponding extraction strategies.</p>

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Evaluation Model and Application of Remaining Oil Potential Based on Combined Weight Method

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • Lyu Dongliang,
  • Wu Hengdi,
  • Liu Cheng,
  • Li Jian,
  • Li Jun

摘要

In response to the issue of excessive reliance on subjective experience in determining indicator weights for remaining oil potential evaluation in high-water-cut oilfields, an evaluation model based on the combined weighting method and fuzzy comprehensive evaluation was developed. Appropriate evaluation indicators were selected by comprehensively considering remaining oil reserves and ease of extraction. The Analytic Hierarchy Process and entropy weight method were employed to calculate subjective and objective weights, respectively, and a fuzzy comprehensive evaluation model was established to assess remaining oil potential. Taking actual production blocks in the oilfield as the research subject, the evaluation results indicate that the overall potential of remaining oil in the production blocks is relatively limited. Multiple layers require further potential tapping through measures such as optimizing injection-production patterns, implementing refined water flooding, or applying tertiary oil recovery techniques. This evaluation model effectively reduces subjectivity in weight assignment, enhances the reliability of the evaluation results, and provides a scientific basis for assessing remaining oil potential and formulating corresponding extraction strategies.