Technical Study of Fracturing in Hongtai Gas Reservoirs with Low Pressure and Its Application

Constituted by compact rock materials,and with relatively pressure coefficient,Hongtai Gasfield was regarded as a typical three low reservoir,that is,low porosity,low permeability and pressure.In order to get commercial yield,gas wells must be fracture reconstructed.In consideration of the problems existed in fracturing of reservoirs with pressure,technological parameters are optimized according to geological characteristics of Hongtai Gas Reservoir.For the purpose of improving stimulating effects and production capacity,fracturing scale is ensured on the base of successfully implementing the fracturing project.Foam fracturing fluid system is studied and applied to reduce the problems in fracturing the reservoirs with pressure,and new techniques such as fracturing-production integrated casing string and separated fracturing are tested in gas wells,the new techniques are used to improve the fracturing effect and raise the productivity in the gas fields.