The Research On The Application Of Polymer Flooding Of Sub-main Layer In Sa Ertu Group ? South9 West Block Of Sa Ertu DaQing Oilfield

Inpouring polymer flooding is the most effective means to improve the oil-displacing agent's sweep efficiency and ultimate recovery factor.South9 West Block of Sa Ertu oilfield becomes the sub-main layer productivity construction blocks in 2014.Therefore I compile the polymer flooding reservoir engineering proposal of South3 West Block of Sa Ertu oilfiel,starting from the in-depth study of sub-main layer's depositional features and remain oil distribution in this block,and combine the comprehensive analysis with numerical simulation,and finally maximumly enhance the oil recovery of sub-main layer through upgrading the combination of layers,well pattern and spacing.This paper mainly discusses the research on flooding layer system for SA ? 7-8 and 10-12 oil two kinds of polymer,the uniform well,five spot pattern to design a set of 175 m from wells,351 oil and water wells were designed,including a new drilling 180 wells,150 wells drilling injection,using injection 7wells,wells 13 wells,1 wells to injection.Through the analysis of the geographical conditions,the oil layer structure characteristics of petrophysical property,fluid properties,reservoir sensitivity analysis and reservoir pressure,sedimentary type,the block meets the basic conditions of oil production by polymer flooding.The test shows that the two kinds of reservoir area and industrialization block development effect,two kinds of polymer injection after injection with high speed,through data simulation,in the condition of the well spacing of 175 m achieved better precipitation increasing oil and the effect of polymer flooding.The development effect of the test area and the industrial block provides the basis for the combination of the two types of reservoirs in the western area of and the well pattern deployment.After determining the upper layer system of polymer flooding,the reasonable injection production well spacing is determined by the design of well pattern.In the initial stage of development,the optimization of injection parameters,the reasonable control of injection pressure and the amount of polymer,effectively control the water cut of the block,the effect of oil increasing is obvious,and good development benefit has been achieved.