Evaluation Model Of Production Profile Of Horizontal Well In Bottom Water Reservoir With Barrier

During the development of oil reservoir with bottom water,because of the effect of barrier and formation heterogeneity,production profile of horizontal well is very nonuniform.Water breakthrough quickly in reservoir section with higher permeability and thus lead to ealier water out of horizontal well.So,it is badly in need to reaserch on the evaluation of production profile of horizontal well in reservoir with bottom water.Effect of barrier on reservoir development with bottom water and horizontal well is analyzed in this paper.Results indicate that barrier has great effect on water cut performance and production profile of horizontal well.Horizontal well section shuttered by barrier has little production and the corresponding formation is hard to have effective displacement,while the other section without barrier has large production and is easy to be drowned.Model of bottom water reservoir flow with horizontal well and barrier is established by means of conformal transformation method and periphery theorem.Productivity of horizontal well is given based on the established model.Effects of position and size of barrier in reservoir with bottom water on horizontal well productivity are then analyzed.The established reservoir flow model is coupled with Siwon's perforated pipe flow model,and evaluation method of horizontal well production profile is given.Based on the solving method,Matlab computation module is realized.Finally,the evaluation method is applied to analyze the effects of permeability,formation heterogeneity,reservoir thickness,oil viscosity,and barrier position on production profile of horizontal well.Production profile of horizontal well P1 is predicted by the developed model,and corresponding suggestions are given.The evaluation model of production profile of horizontal well in bottom water reservoir with barrier in this paper can give some theoretical guidance for the development of bottom water reservoir.