灰色理论与熵值法在盐穴储气库评价的应用

Application of Grey Theory and Entropy Method in Evaluation of Salt-cavern Gas Storage

以5个盐穴储气库为研究对象,选取盐岩顶面埋深、含盐地层厚度、含盐率、氯化钠含量、储气规模、夹层厚度以及距管网距离7个评价指标,利用灰色理论进行盐穴储气库建库可行性的评价与优选。采用熵值法和层次分析法计算权重平均值作为评价指标的综合权重,通过计算得到各盐穴储气库综合靶心距,进行盐穴储气库建库可行性的评价与库址优选。研究结论为:评价结果与盐穴储气库所在区域现状基本一致,表明利用灰色理论与熵值法进行盐穴储气库建库评价与优选,可信度较高,实用性较强,可为工程实践提供技术支撑。

Taking five salt-cavern gas storage reservoirs as the research object,seven evaluation indexes,including the buried depth of the top surface of salt rock,the thickness of salt bearing strata,the salt content,the sodium chloride content,the gas storage scale,the interlayer thickness and the distance from the pipe network,are selected,and the grey theory is used to evaluate and optimize the feasibility of building salt-cavern gas storage.The average weight calculated by entropy method and analytic hierarchy process is used as the comprehensive weight of the evaluation index,and the comprehensive bull's eye distance of each salt cavern gas storage is obtained through calculation,and the feasibility evaluation and site selection of salt cavern gas storage are carried out.The research conclusion is that the evaluation results are basically consistent with the current situation of the area where the salt-cavern gas storage is located,indicating that using grey theory and entropy method to evaluate and optimize the construction of salt cavern gas storage has high reliability and practicability,which can provide technical support for engineering practice.