Recently, when controlling the development of oil deposits, extractive companies increasingly use the indicator (tracer) method. The tracer method is based on introducing a predetermined volume of labeled liquid into the control injection well, which is pushed to the control wells by a displacing agent, by the subsequent feeding of the water into the control injection well after the injection of the labeled substance. Simultaneously, sampling is started from the mouth of the producing wells. Selected samples are analyzed in the laboratory to determine the presence of a tracer and quantify it. Based on the results of the analysis, the curves for the dependence of the tracer concentration change in the samples are plotted against the time elapsed from the beginning of the tracer injection for each control production well.