Study Of Numerical Simulation Of Fracturing Of Horizontal Well Of Tight Gas Reservoir

At present,the recovery rate of dense gas reservoirs is not high,the same field of different blocks of the use of the degree is not the same,and the mining process encountered problems are not the same.Unconventional reservoirs and conventional reservoirs differ not only in the reservoir permeability,but also in relation to reservoir burial depths,stratigraphic micro pore throat structures,and different digenetic effects.In this paper,the casting thin sections,scanning electron microscope and mercury injection experiment and computer simulation,the He 8 member of sulige gas field in a sandstone sample hole on structure are analyzed in the combination of macro and micro.The sandstone type,pore type and pore type of the reservoir are obtained.The present research status of fracturing from home and abroad shows that the main unconventional gas reservoir is the method of improving recovery.But China is now only in the Sulige gas field and Changqing oil field for a large-scale application.This shows that for China’s oil field reservoir characteristics of effective measures,but also a long exploration process,a variety of problems can be resolved.In order to be more in line with our situation,it is necessary to start from the most fundamental,such as volume fracturing after the sewing mechanism and the formation of the fracture morphology,which can provide a basis for the establishment of production capacity model.Should also be studied when volume fracturing,Horizontal wellbore length,number of segments,cluster number,cluster spacing,fracture conductivity and so on,the influence of a series of parameters on the fracturing effect,this provides theoretical support for the site.At this stage,the main crack simulation method is local mesh encryption,this method serves as a simple simulation method,in the simulation of a number of cracks on the performance of the advantages.In this paper,the main method of numerical simulation of volume fracturing is local mesh encryption.In the numerical model software to establish the ideal model,the volume fracturing,cluster spacing,number of clusters,number of segments,and length of the crack.On the basis of previous studies,it is assumed that the fluid in the formation flows first through the crack wall,and then through the cracks directly into the horizontal wellbore.So,Established a horizontal wellbore as a straight line source,the crack is seen as a band source,unsteady productivity model of compact gas reservoir after fracturing,according to the preferred scheme,compare the yield obtained from the numerator with the calculated capacity of the established formula,verify the accuracy of the model.