The relevance of the research consists in the fact that the current state of many oil fields is characterized by their mass entry into the late stage of development, well production of which is accompanied by increase in water cut of wells while maintaining a sufficient number of residual recoverable oil reserves. Not all streaks are involved in development when exposed to reservoir flooding. The reasons are the heterogeneity of formation, both vertically and laterally, high ratio of the viscosity of the extracted oil and pumped water. At the same time, the processes in the reservoir are accompanied as well by a premature breakthrough of water and, consequently, decrease in the oil recovery coefficient. In this regard, many oil companies pay great attention to the use of filtration flows regulating methods. One of the most effective technologies with a flow-reducing effect is the use of cross-linked polymer compounds. Their advantage is a higher viscosity of a solution than that of a conventional polymer, the creation of a high residual resistance factor and the ability to penetrate deeper from water-injection well. The aim of the study is to assess the technological effectiveness injection of viscous-elastic surface-active composition at one of the fields in Western Siberia. Object of research is a section of the reservoir, with uninvolved oil reserves and high water cut. The research methods include the analysis of the processing site, mapping, inventory estimation. Results. The authors have calculated the efficiency of processing the injection well based on the integrated characteristic of displacement and by the results of field geophysical researches; and revealed that the technology of using viscous-elastic surface-active structure was effectively applied and can be used further on other fields of Western Siberia.