Abstract: The optimization of oil-gas field stimulation is a complex engineering project with multi-targets, which allows to use a series of technical and economic indexes for complete and systematical evaluation of available stimulation processes. According to correlation analysis principle of grey system theory, a grey correlation analysis approach used in oil-gas stimulation optimization is developed, with specifically applied cases. It is concluded that this approach can be not affected by mathematical statistics ones which limit data; when economic index of each program is given, the analytical result gained by applying this approach is given without changes for different analysts or decision-makers; possessing advantage over another methods in quantification of parameters. In addition, this approach is simple and reliable in calculations.

Key words: stimulation, optimization, grey system, technical and economic index