Abstract: Based on the fracturing data of 17 oil wells, this paper uses the grey correlation method to have analyzed the main factors influencing the fracturing effect, uses the self-organization method to have established the correlativity among these factors, Incremental oil recovery and effective period, and obtained the prediction equation of Incremental oil recovery and effective period after fracturing (adopted different fracturing technology) of different blocks in Monggulin Area. The field practice proved that the equation is accurate in prediction, practical, and can be used for economic evaluation before fracturing, so as to direct the well selection, layer selection and the fracturing technology optimization.