Study On Evaluation Method Of Horizontal Well Volume Fracturing Engineering Effect

The productivity of volume fracturing horizontal wells mainly depends on the volume of fracturing reconstruction and the equivalent permeability in the reconstruction area.Therefore,the volume of reservoir reconstruction,the fracture conductivity reflecting the equivalent permeability and the fracture density affect the reconstruction effect of volume fracturing engineering together.Therefore,the single evaluation parameter commonly used at present can't reflect the reconstruction effect of fracturing more comprehensively and truly.Aiming at the problem that the key parameters used to characterize the fracture density and fracture conductivity of horizontal well volume fracturing engineering are difficult to be described by existing theories,this paper establishes the calculation model of average fracture length and equivalent fracture number in reservoir volume based on the principle of energy conservation and material balance,and on this basis carries out average fracture length.The variation of degree and equivalent crack number and the main influencing factors are analyzed.Based on the actual fracturing data and production data,the average fracture length and equivalent fracture number in the revamping volume are calculated.The evaluation parameters affecting the revamping effect of volume fracturing engineering,SRV,fracture density and conductivity,are quantitatively characterized.Based on the relationship between the effect of engineering reconstruction and the weight of each quantitative evaluation parameter on the effect of horizontal well volume fracturing engineering reconstruction,a comprehensive quantitative evaluation model for the effect of volume fracturing engineering reconstruction considering the different contribution of three factors to the effect of fracturing engineering reconstruction is established.On this basis,a comprehensive evaluation model for the effect of horizontal well volume fracturing engineering reconstruction is formed.The evaluation method of fracturing engineering reconstruction effect established in this paper has a good correlation with productivity,thus realizing the accurate quantitative evaluation of horizontal well fracturing engineering reconstruction effect.The research results of this paper can not only provide important theoretical guidance for volume fracturing design,but also determine the effect of fracturing combined with geological factors.The main factor controlling the productivity difference between fractured wells.