Abstract
Abstract The interlayer interference is very serious in the process of water flooding development, especially when the reservoir adopts commingling production. The implementation of various interlayer interference mitigation measures requires that the production performance parameters and remaining oil distribution of each layer of the reservoir should be clearly defined, and the accurate production splitting of oil wells is the key. In this paper, the five-spot pattern is simplified to a single well production model of commingled production centered on oil well. The accurate production splitting results are obtained through automatic history matching of single well production performance. The comparison between the calculation results of this method and that of reservoir numerical simulation shows that the method is simple, accurate, and practical. In the field application, for the multilayer commingled production reservoir without accurate numerical simulation, this method can quickly and accurately realize the production splitting of the reservoir according to the development performance data.
Highlights
Due to the influence of reservoir physical property difference among layers, the interlayer interference is serious in the process of water flooding development when the reservoir adopts commingling production, and the difference of producing degree among layers is large
According to the actual dynamic production data of oil wells, the control reserves of single well are calculated by using water drive curve method, and the control area of single well is obtained, which is taken as the constraint condition of fitting injection-production well spacing
When the mathematical model of multilayer commingled production reservoir is equivalent to the radial flow model of n layers, the control area of a single oil well in the center can be equivalent to a circle; the injectionproduction well spacing can be expressed as follows: rffiffiffi
Summary
Due to the influence of reservoir physical property difference among layers, the interlayer interference is serious in the process of water flooding development when the reservoir adopts commingling production, and the difference of producing degree among layers is large. The commonly used methods of production splitting include liquid production profile coefficient method [1,2,3], effective thickness method [4], static land splitting coefficient (KH) method [5,6,7], and dynamic splitting equation method [8,9,10] These methods only use effective thickness, effective permeability, and other formation parameters to split production, and seldom consider the influence of remaining oil saturation difference between layers at different time on production splitting, which cannot truly reflect the actual production situation of each underground layer, resulting in low accuracy of production splitting results. By using the numerical method, the formation pressure and oil saturation at any point in the seepage model can be obtained, as well as their changes with time
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
