基于云模型的低渗透油田开发效果综合评价方法

摘要

Fuzzy comprehensive evaluation for oilfield development effect can weaken the characteristics of fuzziness and randomness.In order to deal with this problem,a comprehensive evaluation method based on cloud model was proposed in this paper to evaluate development effect for low permeability oilfield.In this method,the evaluation index system for low permeability reservoir is built firstly.Then weight grade and evaluation grade in cloud model are obtained.According to arithmetic rules of cloud,the development effect for low permeability oilfield is evaluated.Finally this method is applied in an actual reservoir.Results demonstrate that this method can provide intuitive and reliable evaluation for low permeability oilfield.And the evaluation results can provide management guidance on the field development planning.%针对模糊综合评价方法评价油田开发效果存在弱化评价的模糊性和统计性的缺点,利用云模型解决模糊问题的优势,将云模型应用于油田开发效果综合评价中,建立了基于云模型的低渗透油田开发效果综合评价方法.首先选取并建立了低渗透油田开发效果评价指标集,然后构建了各评价指标的权重云和评价云,最后基于云算数运算法则,计算得到了油藏开发效果的评价结果.采用该方法对研究区块的开发效果进行综合评价,其结果直观、可靠,符合生产实际,具有一定的借鉴作用,可为今后的油田开发调整提供依据.