Sabei Development Zone Southeast Piece Of Fine Reservoir Description And Improve The Efficiency Of Polymer Flooding

Gaza north development zone polymer flooding after15years of industrializationdevelopment, has formed a relatively perfect supporting adjustment technology, mainly inpolymer flooding in the tertiary oil recovery yield ratio by the "11th five-year plan" period of44.3%to59.6%of the "1025" period. But in recent years, already betting poly block mostinto water rise phase, polymer injection amount enlarged year by year, dry powder dosagefrom2006in5768t increase2010t. Development effect and efficiency gradually variation,tons of poly oil production by2006t/t descend to2010years of99t/t, tons of oil increasetogether by2006t/t descend to2010years of59t/t. To ensure that the lower three miningcost and improve the efficiency of polymer flooding and improve the development effect, thesubject will be in daqing oil field in north gaza zone, key research well shock combiningmultidisciplinary fine reservoir description and the characteristics of remaining oildistribution, use interior core flooding test, carry out the reservoir and molecular weight,concentration matching relationship research, combining test site tracking numericalsimulation, and carry out multiple plug dynamic change regulation of the research,comparative evaluation polymer flooding process adjustment the adaptability of thesupporting technology, summarizes the forming a set of appropriate type reservoir potentialefficient of the complete set adjustment technology for the second polymer flooding reservoirfine tap and efficient development provides technical reserves and practice experience, torealize the daqing oilfield stable40million tons of crude oil and oil the objective ofsustainable development.This paper studies regional for gaza north development zone north three west southeastblock type reservoir polymer flooding block, through the application of high resolutionsequence stratigraphy, rivers fine sedimentology, reservoir characterization techniquecombined well shock guided fine geologic research, has been clear about the study ofregional tectonic characteristics, reservoir development condition, reservoir sedimentarypoint and not all sex (including vertical heterogeneity and plane heterogeneity), quantitativeresearch area longitudinal and plane remaining oil distribution characteristics, on this basis, inorder to realize the polymer molecular weight, injection concentration personalized design,carry out series constant pressure injection interior flow test, the establishment of a gaza northdevelopment zone polymer molecular weight, injection concentration and reservoir matchingrelation chart, and to chart as the guide, combining reservoir development characteristics,polymer flooding control degree and remaining oil distribution, the injection well injectionconcentration and intensity, carries on the minimum scale personalized design. According tothe test site reservoir development and dynamic change characteristics, in order to improvereservoir producing status, and promote the balanced by experimental effect for the purpose,to pilot injection well implement classification optimization: one is the reservoir thickness,permeability is good, intraformational serious contradictions, injection pressure low25Wellsin polymer injection former depth profile control are; The second is for reservoirdevelopment in the average level above or the presence of high permeability layer of90Wells, take high and low concentration alternate polymer injection; The third is for thedevelopment of low permeability, thin thickness,28Wells adopt low concentrated low injection, ensure injection condition, and polymer molecular weight, concentration andreservoir matching relation chart as a guide, determine the classification of injectionconcentration limit, and improve the efficiency of polymer flooding.