The relevance of the study is caused by hydrodynamic relation between the injection and production wells is the most important condition for the full development of reserves.Studying the patterns of distribution of injection volumes within its target facility is the most important task of monitoring its development. To date, oil, and gas companies for these purposes use methods of hydraulic monitoring and indicator research. These methods can most accurately assess the direction of movement of the filtration flows, but due to the high cost and duration of these studies they are not often carried out in the Perm Krai fields. The paper proposes to evaluate the distribution of injection volumes within the element of the development system by correlating the accumulated characteristics of their work. The main aim of the study is to develop an indirect method for quantifying the distribution of water injected into the formation based on the use of field materials. Object: carbonate deposits of the Gagarinskoe, Ozernoe and Opalikhinskoe oil fields. Methods: geological and field research, correlation analysis. Results. Multilevel statistical modeling made it possible to establish the stage-by-stage process of the effect of cumulative injection on accumulated fluid production and to substantiate at a quantitative level the boundary values of the transition from one stage to another.The analysis of the dynamics of the correlation coefficient between the accumulated values of water injection and fluid production allowed us to establish qualitative indicators of the waterflooding system within the considered element of the development system.The obtained qualitative indicators of the waterflooding system demonstrate high reliability of practical application, which is confirmed by the materials of tracer studies, as applied to the carbonate deposits of the Gagarinskoe, Ozernoe and Opalikhinskoe oil fields.