Application of Fracturing Technique for Low Permeability Gas Reservoirs

Sulige gasfield is characterized by low pressure,difficulty flowback after fracturing,and the conventional fracturing technology has large damage on reservoirs,which influences the yield increasing of fracture.With the injection of liquid nitrogen,and increasing of the flowback power of fracturing fluid,it can increase the flowback rate after fracturing and reduce the reservoirs damage by fracturing fluid.Optimizing construction technique,low damage and high performance-cost ratio fracturing fluid system,in the paper a series of hydraulic fracturing technique suitable to Sulige gas field are developed.