The Adaptive Numerical Simulation Of Polymer Flooding In The Reservoir P?

With the gradually deepening of the oil field development,The comprehensive water cut of the first-order oil reservoir in the east of the northern transitional zone of Sabei development zone has reached a high level of 97.25%,since the block has been put into operation,the oil production using water drive oil recovery gradually decreasing quickly,the average reservoir pressure is lower than the original formation pressure,Continue to water flooding has been difficult to achieve oilfield economic and effectively development.From Daqing oil field conduct the field testing of polymer flooding so far,polymer flooding has become a very important technology to keep high and stable yield for tertiary oil recovery of daqing oilfield.To maintain stability of the polymer flooding to improve oil recovery,realize oilfield economic development effectively,the adaptability research of polymer solution and the reservoir and parameters optimization for polymer flooding is a problem to be solved in the process of polymer flooding development.This article through to analysis geology,sedimentation and waterflooded condition and remaining oil distribution features of the P? block over the first-order oil reservoir,to carry out physical simulation experiment research on polymer flooding,analyzed adaptability to core of the polymer solution with different molecular weight and concentration;Through collect the static and dynamic data of Pl,using Petrel software,using random modeling phase methods,established the permeability,porosity,effective thickness,water saturation and other properties model,established the fine geological model with north eastern P? block;at the same time,on the basis of geological model is established,combining research wellblock fluid property characteristics and development characteristics of wellblock,application of Elipse software established the numerical model of the research wellblock,wellblock reserves fitting and dynamic history matching,fitting precision is within 5%,ensure the accuracy of the model;On the basis of history matching,made the development plan of different formation pressure,based on the predicted effect of polymer flooding in different formation pressure,determined according to the development effect of the block reasonable formation pressure;at the same time,set the different polymer injection parameter optimization scheme,using numerical simulation method on development effect prediction of the program,optimization reasonable injection parameters under the physical characteristics of P? reservoir.