Relevance. Deposits of the Paleozoic basement are considered to be one of the promising and poorly studied objects of oil and gas exploration in Western Siberia. The complexity of the structure of the object and the hydrocarbon deposits identified in it is due to the variety of tectonical and sedimentary processes that manifested themselves in the territory under consideration in the Paleozoic era. Reconstructions of these processes are based on the analysis of the material composition, age determinations of the basement rocks obtained during drilling of deep wells and seismic data. The layered-folded structure of the productive reservoir of the roof part of the foundation (formation M1) requires a certain methodological approach in the development of hydrocarbon deposits concentrated in them. Based on the structural features, it is most rational to develop the M1 Archinskaya area oil reservoir using a horizontal fund of production wells drilled in its roofing part. Aim. To systematize the profiles of oil inflow and waterlogging of the production of the operating fund of horizontal wells of the M1 formation. To compare the intensity of drilling mud absorption with the type of collectors of the basement rocks of Archinskaya area. To analyze the obtained data of the inflow profiles in accordance with the heterogeneity of the filtration-capacitance properties of the intervals of the layered-folded model of the productive reservoir and to systematize them according to the dynamics of the behavior of the parameters under consideration over time. To formulate the reasons for the formation of the selected types of inflow in accordance with the predicted filtration and reservoir heterogeneity of the intervals opened by a horizontal well. To submit proposals for the efficient operation of the horizontal well fund. Object. Roofing part of the Paleozoic basement rocks (stratum M1) of Archinskaya area. Method. Based on the interpretation of the obtained profiles of oil inflow and water flow from a horizontal well with a predicted heterogeneity of the filtration properties of the layered model of the M1 formation, manifested in the interval absorption of the washing liquid during drilling. Results. For each selected type, a legend of the filtration-capacity heterogeneity of the inflow intervals by a horizontal well was compiled and measures were proposed to extend the period of its operation.