介绍了灰色综合评价的数学模型，并利用灰色关联分析法确定各被选方案的重要程度，进而确定最优方案。选取合适的井进行压裂是获得良好经济效果的基础条件，目前油田主要依靠专家经验来选择压裂井层，具有一定的盲目性。而影响压裂效果的因素主要分为地质因素、施工因素以及其它人为因素，关系复杂且呈非线性。文章主要考虑地质因素的影响，利用层次分析法确定各因素的权重，同时结合灰色关联法计算各候选井与最优井的关联度，最后通过对比排序优选适合压裂的候选井。运用此方法对江汉油田黄场区块7 口井进行优选，与现场结果吻合，从而证实了该方法的有效性，为现场选井提供了理论基础。

The mathematical model of grey comprehensive evaluation is introduced. Grey correlation analysis method is used to confirm the importance degree of all the selected projects and the optimal decision is then obtained. The selecting of appropriate well for fracturing is the basic condition to obtain nice commercial efficiency. At present, it depends on the expert experience in oilfield to select fracturing well, which has certain blindness. The factors affecting the fracturing effect are mainly geologic factor, construction factor and other human factor, of which the relations are complex and nonlinear. The geologic factor is mainly considered and the analytical hierarchy process is applied to determine the weight of the factors. Grey correlation analysis method is used to analyze the correlation between the selected well and optimum well, and then optimize the appropriate wells for fracturing. This method is applied in Huangchang block in Jianghan Oilfield, and the result proves the effectiveness.