Study On Influence Factors Of Hydraulic Fractured Horizontal Well Productivity In Shale Gas Reservoir Under Multi-Well Condition

Hydraulic fractured horizontal well is the most effective means of shale gas reservoir development.The structural complexity of the shale gas reservoir,which leads to the complexity of the shale gas flow,increases the difficulty of the theoretical development of productivity prediction.Therefore,it is very important to establish a numerical simulation model for shale gas reservoir productivity evaluation and shale gas reservoir productivity prediction through the equivalent treatment of shale gas reservoirThe pore structure of shale gas reservoir is complex,the pore scale span is large,and the mechanism of shale gas flow is complex.First of all,in this paper,analysis shale gas reservoir properties through the equivalent treatment,including: the equivalent treatment of shale gas reservoir,the equivalent treatment of adsorption and desorption,diffusion equivalent treatment and the equivalent treatment of fracture parameters.Based on the basic data of a shale gas reservoir in China and the research needs to determine the basic parameters of the reservoir.According to the different geological condition to establish two different model,fracture network model and slab fracture model.Through production decline rate and inter well interference analysis of influencing factors to determine the main control factors of shale gas well production decline.Secondly,study on the current mainstream of several shale gas production decline analysis method,it is concluded that the each kind of production decline method in fitting and prediction performance of different flow stages,to the most appropriate analysis method.Finally,Because shale gas well production is fracturing production,and multi well exploitation,the interference between wells is obvious.the interference of horizontal wells in shale gas wells is analyzed.Through the analysis of various factors,the orthogonal experiment was designed to analyze the influence factors.In this paper,the main parameters of the field are controlled parameters(fracture parameters,well spacing,etc.),Therefore,it will have a certain guiding significance for shale gas production under multi-well condition.