A new method of intelligent split-injection regulation for strongly inhomogeneous multilayer double-high reservoirs
Intelligent layered water injection is an important element of modern oilfield water injection regulation.In order to solve the problem of low efficiency of water injection and development in strongly inhomogeneous multilayer system double-high reser-voirs,a new method of intelligent layered water injection regulation for this type of reservoirs is proposed by utilizing the reservoir geological information and production data.The difference between this method and the traditional layered injection method is that it does not need to establish a geological model,but only needs to calculate the vertical and planar splits by fitting the historical produc-tion dynamics to refine the field splitting scheme,thus greatly saving time.The vertical and planar water injection splits are calculated by historical fitting of the actual production data,which helps to analyze the water injection share of different wells between different layers and in the same layer in multilayer reservoirs,and at the same time combines with the improved SPSA(simultaneous perturba-tion stochastic approximation)optimization algorithm to optimize the injection and extraction in the reservoir.Applying the method to Xinjiang L9 reservoir,it is predicted that after two years of implementing the typical well group adjustment measures,the cumula-tive oil production of the block has increased by 4.6%,the cumulative water injection has decreased by 3.3%,and the water content of the well zone has decreased by 2.6%compared with the previous water injection scheme,which is a remarkable effect.The study shows that this method can effectively improve the utilization rate of water injection and optimize the development effect of the oil-field,which provides a new idea and method for the intelligent split-injection regulation and control of the strong inhomogeneous mul-tilayer system of double-high oil reservoirs.
multilayer reservoirstrongly inhomogeneouslayered water injectioninjection and recovery optimizationintelligent split injection
万方数据
维普
