Optimization Design For Dtaged Fracturing Of Low Permeability And Thin Layer Horizontal Wells In J58 Well Area

J58 well region is a low porosity,low permeability,low pressure gas reservoir lithologic traps,localized formation water,gas and water but no uniform boundary.The amplitude of the micro-well region configuration,fault development,top-down development of the cassette 3,the cassette 1,2 mountain,the mountain sets reservoir 1,wherein an interval of the main cartridge developing layer.Producing a thin layer of a cassette difference layer,the upper and lower spacer into thin,thick layers of two,wherein the producing reservoir into monosandbody sectional profile and a bottom aqueous.In the early stage of the J58 well,the reservoir stage of the reservoir is mainly composed of straight wells.The area is divided into 14 wells,and the conventional fracturing transformation process is carried out.Among them,12 wells have different degrees of water,and the industrial gas wells are only 4,the effect is not very satisfactory.In order to solve the problem that the conventional fracturing and reconstruction of the well in the J58 well is not prominent,According to the characteristics of reservoir 1 reservoir,the characteristics of gas reservoir and the characteristics of surface water production,this paper puts forward the main idea of box 1 low permeability thin layer fracturing transformation.In this paper,The dynamic and static curves of rock mechanics parameters and geostresses of reservoir 1 reservoir are established by logging data,and the stress profiles and mechanical parameters of reservoirs are predicted accurately.Box 1 well completion and fracturing process optimization,proposed the naked eye packer piecewise fracturing technology,and preferred out of low displacement,variable displacement and the use of low viscosity fracturing fluid control of high-tech;The liquid fracturing system of box 1 is proposed,and the mixed fracturing fluid system of "guanidine gum + liquid cross-linking liquid" is put forward,and the fracturing software FracproPT10.3 is used to optimize the construction parameters The Research results in the field application has made a better yield effect.