Research On Optimization Of Injection And Production Integrated Methods Based On Numerical Simulation

At present,the study on improving water-flooding effect is most one of the subsystems according to the reservoir,process,ground of the three subsystems is optimized.In fact,each subsystem organically formed the whole process of the production of oil and gas,the process is a large system,only the system as a whole in order to give full play to its function.In view of the integrated optimization of oilfield water flooding development,a complete set of methods has not yet been formed theoretically because of the numerous factors that should be taken into account and the means of governance.According to the current problems in the development of water drive oil field,this paper comprehensively considers three factors,such as oil reservoir,acidification process and water quality of ground water flooding.By constructing three-dimensional pore network model,we studied the flow rule of different particle concentration and particle size in the network model,and analyzed the impact of suspended particles on reservoir damage.Based on the equilibrium equation of suspended particulate matter and combined with water injection impedance model,the quantitative description and numerical simulation of reservoir damage by injected water are performed.Based on the distributed parameter model,a distributed parameter model of sandstone reservoir single acidification is established.According to Bekele Levillet flooding theory and combined with seepage resistance model,a numerical simulation representation method for sandstone reservoir acidizing technology is established.Based on the idea of optimization,using system engineering theory,a mathematical model of multivariable and multi constrained oilfield water flooding and development optimization is established,and its optimization algorithm is studied,and a set of integrated optimization method based on numerical simulation is formed.The Egg model is selected as an example to analyze the Benchmark model.The optimized method of injection and production integration is used to optimize the method,and the feasibility of the method is verified.Finally,the method is applied to a block reservoir for field application analysis.Field results show that the injection production integration optimization method considering reservoir injection production,acidification and improve the ground water quality in three aspects,the implementation of integrated optimization of governance of the target area,greatly improve the efficiency of oilfield development,which has important guiding significance for efficient development of water drive oil.