Polymer impaction is one of the modern technologies widely used to enhance oil recovery. The aim of this method is to increase the recovery efficiency by adjusting the heterogeneity of the oil reservoir and the differences in oil-water mobility. Various types of polymers, especially high molecular weight polymers, improve the filtration and oil recovery coefficient by adjusting the viscosity under reservoir conditions. However, the correct selection of the optimal concentration of the polymer solution and application parameters is of critical importance. This study aimed to determine the optimal polymer amount to increase the efficiency of polymer impaction through laboratory tests and hydrodynamic simulation. Polymer solutions of different concentrations were prepared in laboratory conditions and their rheological properties under temperature and pressure conditions were investigated. During the experimental studies, the dynamic viscosity, filtration properties, distribution within the reservoir and the effect on phase balance of the polymer were studied. In addition, the adsorption and molecular interactions of the polymer on rocks with different mineralogical compositions were also investigated.
Experimental data were incorporated into hydrodynamic modeling to simulate the flow dynamics and filtration properties of the polymer solution in oil reservoir conditions. The modeling results showed that the optimal concentration of polymer impact allows for an increase in the recovery factor by 15-25%, reduces early production water release, and balances pressure differences between wells. In addition, uneven distribution and high adsorption of the polymer can cause blockages within the reservoir, reducing production efficiency. Therefore, the rheological and filtration parameters of the polymer should be carefully determined according to the reservoir conditions. As a result of the studies conducted, the effectiveness of different polymer concentrations was compared and the optimal amount of impact was determined according to the geological characteristics of the reservoir. It was found that maintaining the polymer concentration between 0,5-1,0 % both increases production efficiency and prevents blockages and adsorption within the reservoir. The results of this study provide new approaches to the effective use of the polymer impact method in oil recovery, creating practical application opportunities for reservoir engineers and oil production specialists.