Shale gas selection evaluation method and system based on multi-factor progressive superposition

The invention provides a shale gas selection area evaluation method and system based on multi-factor progressive superposition. The method comprises the following steps: determining evaluation parameters of a shale gas research area; classifying the evaluation parameters and getting the combination category of each evaluation parameter; selecting the key evaluation parameters from the evaluation parameters, obtaining the basic geological data corresponding to the key evaluation parameters in each combination category, and generating the zoning map of the basic data according to the basic geological data; overlapping the zoning maps of the basic data by equal weights according to the combination categories of the key evaluation parameters to obtain the combination geological factor zoning maps corresponding to the combination categories; continuously overlapping the combination geological factor zoning maps corresponding to the preset number of combination categories with equal weights,superposing the results