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一个油气藏的生产能力受储集层有效厚度、孔渗性等参数的影响，这要求研究者必须对各影响因素的作用有较为明确的认识，合理地确定各因素的权重。灰色关联度分析理论认为，相对变率是刻划事物发展过程的理想指标，关联度表征了事物在发展过程中的关联程度。如果两个事物在发展过程中，相对变率基本上一致，说明二者有较好的关联度，彼此间的影响或控制较大。用灰色关联度分析理论的相对变率关联度分析法，较好地解决了对研究区实施模糊综合评判时遇到的如何确定因素权重的问题。表３参３（陈志宏摘）
The production capacity of an oil and gas reservoir is affected by parameters such as effective reservoir thickness and porosity and permeability. This requires researchers to have a clearer understanding of the role of each factor and to rationally determine the weight of each factor. Gray relational analysis theory holds that relative rate of change is an ideal indicator of the process of developing things, and the degree of correlation indicates the degree of the correlation between things in the process of development. If two things in the development process, the relative rate of change is basically the same, indicating a good correlation between the two, each with greater influence or control. By using the gray correlation analysis theory, the relative variable rate of correlation analysis method can well solve the problem of how to determine the weight of the factors encountered in the fuzzy comprehensive evaluation of the study area. Table 3 reference 3 (Chen Zhihong pick)