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地下储气库的建造是一项大型、复杂的系统工程，其优化设计不仅需要满足经济上的要求，还要考虑其功能、技术、安全及环境等诸多因素的影响。地下储气库的优化设计属于多因素的综合评价问题，为此介绍了地下储气库优化设计的灰色关联分析法。首先根据地下储气库工程的实际情况构建地下储气库的评价指标（因素）体系和由各评价指标构成的预选方案，在众多预选方案的基础上构建理想方案，通过计算各预选方案与理想方案的关联程度来确定最优方案；构建了由年综合费用、垫底气量、最大地层压力、注采井数、压缩机站功率和使用寿命等指标构成的储气库综合评价指标体系，在关联度的计算中引入了因素的权重并介绍了权重计算的层次分析法。由于考虑了各项评价指标的权重，使得分析结果更符合工程实际。

Gray Correlation Analysis of Optimized Design for Underground Gas Storage

Building underground gas storage is a large and complicated systematic engineering. Its optimized design should not only meet the economic requirements, but also consider the influence of many factors such as its func tion, technology, safety, and environment, etc. The opti mized design of underground gas storages covers integrative evaluation of many factors. The article introduces the meth od of gray correlation analysis for the optimized design of un derground gas storages in detail. At first, the evaluation in-dexes(factors) system to build underground gas storages is made according to the actual situation of the underground gas storage engineering. And the pre-selected programs pro duced by the evaluation indexes are proposed. Based on the many pre-selected programs, the ideal program is derived. Comparing the correlation level between the pre-selected pro grams and the ideal program, the optimum program is decid ed. The integrative evaluation index system of gas storages is made with the general annual cost, the cushion gas vol ume, the maximum formation pressure, the number of injec tion and recovery wells, the power and life of compressor stations. The weights of different factors are imported in the calculation of the correlation level. And the level analysis method of the weight calculation is introduced. The analyzed results much more fit the engineering reality since the weights of different evaluation indexes are considered.