Background In the article possibilities of nonstationary flooding technology are considered. The basic physical principles of technology are stated. The reasons for low popularity of nonstationary flooding technology for oil production enterprises are revealed. Aims and Objectives To substantiate the urgency of using and improving nonstationary flooding technologies impact, conducting pilot industrial works for adaptation and creation of new nonstationary flooding technologies, and also to determine the conditions for their application effectiveness. Results The results are as follows: 1. in the 1990s, the decisive influence in the oil-producing industry was made by experts oriented to Western technologies. Nonstationary flooding was not included in the list of these technologies; 2. despite its relative simplicity, practical implementation of nonstationary flooding technology requires considerable preliminary preparation. Nonstationary flooding is one of the most knowledge-intensive methods of increasing oil recovery; 3. nonstationary flooding technology, imple-mented on an oil deposit, tends to «aging», i.e. its effectiveness decreases over time. It requires a constant change in technology, its integration with other methods.