Nitrogen injection is a widely used enhanced oil recovery technique aimed at improving oil recovery from reservoirs. This article provides a comprehensive overview of the use of nitrogen injection in reservoirs, highlighting its advantages, challenges, and recent advancements. The paper discusses the mechanisms of nitrogen injection, its impact on reservoir performance, and the factors influencing its effectiveness. Additionally, it addresses environmental considerations associated with nitrogen injection and potential mitigation strategies. Overall, this review aims to contribute to the understanding of nitrogen injection as an EOR method and its role in maximizing oil recovery from reservoirs. The review of the articles on nitrogen injection demonstrates that this technology, due to several advantages, is very promising for enhanced oil recovery. The main merits of this technology include nitrogen's ability to dissolve in oil to some extent, thereby improving its mobility, especially under high pressures, as well as its accessibility and cost-effectiveness compared to other gases. In this way, it can be presumed that nitrogen injection technology in oil reservoirs allows for a significant increase in oil recovery. This technology can be used for the treatment of producing well bottom zones and injecting nitrogen through injection wells to maintain reservoir pressure.