Research On The Polymer Flooding Efficiency Of Class ? Reservoirs Oil Layers

In recent years,folymer flooding technology was widely applied in oilfield,The major reservoirs folymer flooding into industrialized production,has become the oilfield stable of high water cut period maintain an important technical means.As the major reservoirs of polymer injection area expanded gradually declined,remaining reserves,must seek other formations of the polymer injection method research currently become one of the important work of oilfield development.Block A belongs to the second type reservoir,single layers are more,reservoir structureis complexed,at the same time there is a large number of off-table,Flat and vertical heterogeneity is strong.This paper established the geological model of the reservoir,to complete the production history data fitting,the remaining oil distribution in different types of sand bodies on the map and are completed,the remaining oil reserves microfacies and the production level of;The optimization of the injection production ratio,the production fluid strength,the reasonable working system and the reasonable water injection layer division method in different stages of the study area are optimized;The prediction model of reservoir engineering method is established,and the variation rule of the development index of the system is predicted by the numerical simulation technique.The article through to secondary oil polymer injection test,by physical simulation experiments and numerical simulation techniques,and useing model to simulate the secondary oil,work out the different characteristics of polymer development of countermeasure,determination of technical adjustment limits of polymer flooding stages:.The results show that the optimal timing of profile control and injection is the initial stage,and the recovery rate is 12.20% and 12.73%,respectively.The prediction results show that the best time for the low value of different parts of the fracturing effect is the best,the final recovery rate is 12.45%.In the process of development,the contribution of each measure to the final recovery rate is as follows: the contribution of the profile control measures is 32.64%,the contribution rate of the injection measures is about 34.06%,and the contribution rate of fracturing measures is about 33.31%.