FEATURES OF THE STRUCTURE AND NATURE OF POLLUTION OF THE UPPER PART OF THE SECTION OF OIL STORAGE FACILITIES IN THE VOLGA RIVER VALLEY

Link for citation: Mingaleva T.A., Shakuro S.V., Egorov A.S. Features of the structure and nature of pollution of the upper part of the section of oil storage facilities in the Volga River valley. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 7, рр. 137-147. In Rus. The relevance of the study is caused by the fact that soil pollution with oil products has a complex dynamic character in the spatio-temporal region. Therefore, the physical properties of soils in solving geophysical problems of contouring and determining the thickness of pollution can change under the influence of various factors, expanding the range of search signs of pollution. Determination of physical parameters for areas of oil pollution, similar in nature of development and geological conditions, can help in the future for the effective parameterization of hydrocarbons in soils. The main aim is to build a generalized model with physical properties (electrical resistivity, сompressional and shear-wave velocities) for the soils of long-term oil depot territories. Methods: analysis of literary sources on the research topic; processing and interpretation of field geophysical material for tank farms located on the banks of the Volga River; building a generalized model with a description of the physical characteristics of soils based on the results of geophysics for the soils of tank farms. Results. The authors have studied the nature of soil pollution of two oil depots in the Volga River region using materials published in domestic and foreign literature, which made it possible to substantiate the parameters of a generalized physical-geological model of soil pollution of oil depots. In the general case, the distribution of pollution areas is subject to the features of the geological structure and hydrogeological regime of the areas under consideration and generally includes five zones (the upper area, the area of pollution above the free-flow horizon, the area of seepage in the hydrogeological window, the area of groundwater pollution, the zone of secondary accumulation). This model can be used to predict the nature of pollution in tank farms, loading and unloading points, car repair shops, washing sites and gas stations located near river and lake basins. The model of distribution of oil products in soils will be complex, which will also be expressed in geophysical sections.