Productivity And Production Dynamic Performance Study Of Racted Horizontal Well

In recent years, with the increasing number of horizontal well and the improvement ofbig fracture treatment technology, the way of horizontal well technology combined with thelarge-scale fracturing technology has become the primary means of developing lowpermeability reservoirs. In this thesis, the methods of productivity prediction of hydraulicfracture horizontal well are studied by applying the seepage flow theory, reservoir engineeringtheory, oil-gas field development and so on.The hydraulic fractured horizontal well was studied numerically in Changqing oil field.On the basis of the complex potential theory and potential superposition principle, a newseepage flow model for productivity prediction of hydraulic fracture horizontal well afterhydraulic fracturing is derived, Many influencing factors are analyzed, such as fracturenumber, fracture length, horizontal segment length, fracture flow capacity and so on. theconclusion of daily oil production has been obtained according to the analyses of the pressurefield, Then the optimal values of the parameters were got by comprehensive analysis. TheResearch shows that for specific reservoir with a given basic reservoir parameters, fracturenumber, fracture length, horizontal segment length, fracture conductivity are not the biggerthe better, there should be the best values. The research provides a preference for horizontalwell after hydraulic fracturing. And combine with the theory of arps diminishing marginalproductivity analysis the law of diminishing marginal productivity of fourteen hydraulicfracture horizontal well. Provide the theoretical basis for the later development of reservoir.