Factors affecting the effectiveness of the application gel-forming dispersed compositions in chemical methods of oil recovery improvement

Abstract

The use of enhanced oil recovery (EOR) methods has a significant impact on the current level of hydrocarbon production. Therefore, the issue of maintaining the high efficiency of their application remains relevant at all stages of field development. Currently, in the field of flow diverting technologies (FDT) and technologies for leveling the injectivity profile many different reagents and compositions of EOR have been developed, as well as approaches and methods of their application. The choice of using certain methods of influencing a productive formation depends on its geological and physical conditions (HFC), therefore, the correctness of this choice has a direct impact on the effectiveness of the use of EOR technologies. This article is devoted to an analysis of the effect of certain HFCs on the efficiency of FDT use with the use of GFS gel-forming systems, heat-resistant GFS (T) gel-forming systems and GFS-1AS gel-forming systems with fillers. As a result of the analytical work carried out, the main trends in the efficiency of the application of the above technologies were predetermined from different indicators, such as the effective thickness of the formation, its reservoir properties, the volume of injected reagents, the compartmentalization of the formation, the injectivity of wells before treatment and the change in their mode of operation after treatment. The main conclusion, which is obtained based on the results of the work carried out, is that at the moment there is a need to search for or develop new approaches to the implementation of physical and chemical enhanced oil recovery methods, which will allow solving two main problems: improving the rheological characteristics of cross-linked polymer systems and reducing the cost of the work performed.