Study On The Limit Of Water Flooding And Polymer Flooding Channeling In Block M Of Xinjiang Oilfield

In recent years,the demand of social development for petroleum is getting higher and higher.With the deepening of oilfield development,in the process of waterflooding,the injecting water flows along the dominant channels such as large pores,cracks,etc,which forms a water channeling phenomenon.The water channeling phenomenon can bring about a lot of waste of the injecting water,whose lose rate is as high as 60%.In the subsequent polymer injection process,polymer will also accumulate along the dominant channel,Therefore,it is urgent to solve the problem of turbulent oil reservoirs.In this paper,the turbulence phenomenon in the reservoir of M in Xinjiang Oilfield is studied by the experiment method of the indoor physical model.The laboratory conducts three parallel core-flood experiments under different conditions of heterogeneity,in combination with the geological characteristics of M Reservoir in Xinjiang Oilfield.Which includs water injection model experiments with different injection rates and different injection rates.Through the analysis and statistics of the percentages of cores,recovery factors and moisture content of cores in the core model,in addition,the tracer in the production fluid was detected.It is preferable that the main indicators of the leeches in the water flooding process in the laboratory are the percentage of core absorption and moisture rate rise rate,and the tracer content can be used as an auxiliary index.After the completion of the water flooding experiment,a polymer flooding experiment is conducted.During this experiment,Through the analysis and statistics of the percentages of cores,moisture content of cores and polymer concentration in production fluid in the core model.It is preferable that the index of polyfluorene in the process of polymer flooding in the laboratory is the percentage of core absorption and polymer concentration,and the auxiliary index is the core moisture rate rise rate.On the basis of the preferred water/polyfluorinated index,combined with experimental results of water flooding and polymer flooding experiments,water flooding turbulence maps and polymer flooding turbulence maps are established,and the timing of profile adjustment is compared through the comparison of water/polygon maps.Finally,the reason for the formation of turbulence is further understood through the the water/polygon map.The research results of this paper have positive guiding significance for the control of turbulence the reservoir of M in Xinjiang Oilfield,and the improvement of the success rate of water control,oil stabilization and various oil displacement measures.