The article is devoted to a comprehensive study of the processes of oil extraction during in-circuit flooding using the example of various tectonic and stratigraphic elements of carbonate reservoir deposits in the Volga-Ural oil and gas province. As a criterion for the efficiency of the production of residual oil reserves, the possibility of introducing into the processes of analysis and interpretation of geological and field data an impact factor on deposits, defined as the product of the current density of the well grid and the ratio of producing wells to injection wells, is considered. The choice of this coefficient is due to both the possibility of interpreting data and making appropriate design decisions in conditions of uncertainty, and its high informativeness, taking into account the specifics of the placement of wells within the studied area of the field. Additionally, in order to improve scientific and methodological approaches to evaluating the effectiveness of the current development system using computer modeling systems, it is recommended to take into account the values of productivity coefficients obtained at the time of stabilization of the optimal flow rate of wells after cleaning the bottomhole formation zone and determined by multidimensional regression models for certain tectonic zones, strati- graphic elements or, in general, objects. Conclusions are drawn about the existence of a close correlation between the oil recovery coefficient and various technological indicators, in particular with the proposed coefficients of impact on deposits, which allows us to apply the results obtained in solving various fundamental problems of oil field development.
