The Development of Optimization System of Fracturing about CBM´s Vertical Wells

The reasonable fracturing pumping parameters are the keys to improve the conductivity of the coal reservoir, save costs and improve gas production. According to the characteristics of coal reservoir, a coal reservoir propping agent evaluation system was established and a supporting agent selection system was set up by using multi-level fuzzy comprehensive evaluation method. The fracturing fluid selection system was established by way of comparing to the fracturing fluid performance and compatibility parameters. The parameters of hydraulic fracturing were classified by the influencing factors of the geological and engineering, the pumping parameters optimization system in different permeability was realized. It was successfully apply in the design of the hydraulic fracturing in Panzhuang block in Qinshui Basin.