A design method of uniform laying concentration and its application

At present, the differences of formation have little consideration in the compilation of fracturing design, just following the same pattern of using conventional "experience" pump injection program, which results in poor fracturing effect. Aiming at this phenomenon, a fracturing design method with uniform sanding concentration was presented in this paper based on the concept of liquid efficiency. The method is combined previous theoretical studies with Changqing oilfield reservoir characteristics, on a basis of comparing and analyzing the pre-fracturing operation parameters and effectiveness. The final purpose of this new method is still to form high conductivity ability cracks by fracturing. For the heterogeneity characteristics of sandstone gas reservoir, pilot experiments have been launched in two wells with this method. Expected industrial production has been achieved through the in-site implementation, and well stimulation effect has been obtained in field application.