Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering
The journal «Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering» is a peer-reviewed journal, published since 1903. Founder and publisher: Tomsk Polytechnic University. Publishing house address: room 139 b, 30, Lenin avenue, Tomsk, Tomsk region, 634050. Telephone number: (3822) 60-62-91 E-mail: izv@tpu.ru Publication frequency: monthly The journal is registered by the RF Ministry of Press, Broadcasting and Mass Communications (Certificate PE no. FM 77-65008, March 04, 2016). ISSN (print) – 2500-1019 ISSN (on-line) – 2413-1830 Coverage: Russian Federation, foreign countries. Publication languages: Russian, English. Subscription index in the unit catalogue «Russian Press» – 18054 The journal «Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering» presents original papers, review papers, rapid communications and discussions covering recent advances in geology, exploration and extraction of mineral resources, transportation technologies and deep processing of natural resources, energy-efficient production and energy conversion based on mineral resources as well as on safe disposal of geo assets. The journal will be of interest to geologists, chemists, engineers, physicists, ecologists, power engineers, specialists in storage and transportation of energy resources, IT specialists as well as other specialists in the related fields. Topic areas of the journal «Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering»: • Geo Assets Exploration and Refining; • Geo Assets Mining and Transportation; • Geo Assets Deep Processing; • Energy-efficient Production and Conversion of Energy Based on Geo Assets; • Safe Disposal of Geo Assets and Geoecology Issues; • Geo-Engineering of Eurasia and Marginal Sea; • Economic and Social Aspects of Using Geo Assets. The journal publishes only original research articles in Russian and English not published before. The journal is indexed and archived in: – Scopus; – GeoRef; – Web of Science Core Collection's Emerging Sources Citation Index; – DOAJ. All articles in the journal are peer reviewed. Authors can suggest two reviewers familiar with the research focus of the article. Final decision on any paper is made by the Editor in Chief. The editorial board does not charge authors for the preparation, placement and printing of materials. There are no accelerated timing of issue date. The papers already submitted in other editions are not considered. If the fact of such submission is revealed the paper will be withdrawn by the editorial stuff.
National Research Tomsk Polytechnic University
Ensuring the specified productivity of liquid media ultrasonic atomization
Relevance. Ultrasonic atomization is widely used in many areas of industry for processing liquid media and melts into particles of a given size, safe disposal of gas waste, and spray drying. The feasibility of using ultrasonic atomization is due to the possibility of obtaining fine particles of a monodisperse composition with minimal energy costs compared to other atomization methods. Since atomization is carried out by feeding a liquid medium onto a surface oscillating at an ultrasonic frequency, it is necessary to form on this surface the maximum amount of liquid placed in a layer of the optimal thickness for atomization. To ensure maximum productivity, it is not enough to feed the sprayed liquid onto the surface through one channel, and increasing its diameter does not solve the problem due to the impossibility of distributing a large amount of liquid on the surface around one feed channel with the optimal thickness. Aim is due to the need to ensure the supply of liquid onto the oscillating surface through multiple channels on this surface in order to ensure the highest possible atomization performance without increasing the size of the resulting droplets. Methods. The paper proposes a method for calculating the shape of the spray surface and the distance between the holes through which liquid is supplied to the oscillating surface to ensure a given spray performance. Results and Conclusions. The work resulted in an experimental determination of the dependence of the liquid spreading radius R0 on viscosity and surface tension. It was found that with an increase in viscosity, the liquid spreading radius decreases and an increase in the oscillation amplitude is required for spraying. With a decrease in the surface tension coefficient, the liquid spreading radius R0 increases, and the oscillation amplitude for spraying can decrease. The proposed and developed method, as well as certain numerical values ​​of the R0 parameter, made it possible to design an ultrasonic atomizer of liquid media with the formation of sprayed droplets with an average diameter of no more than 65 μm, with a productivity of more than 15 ml / s at a total power consumption of less than 150 VA. For citation: Khmelev V.N., Shalunov A.V., Terentiev S.A., Genne D.V. Ensuring the specified productivity of liquid media ultrasonic atomization. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 16-24. https://doi.org/10.18799/24131830/2026/7/5223
Copyright (c) 2026 Khmelev V.N., Shalunov A.V., Terentiev S.A., Genne D.V. https://creativecommons.org/licenses/by-nc/4.0
Experimental study of thermal effects on rock properties in one of the super-viscouse oil fields of the Timan-Pechora oil and gas province
Relevance. Thermal methods of reservoir stimulation, such as hot water and steam injection, are widely used in the development of super-viscouse oil and bitumen oil fields. The use of these methods can be complicated by the presence of impermeable formations represented by mudstones, siltstones and silty sandstones, which reduce the efficiency of stimulation. This effect is especially pronounced in fields where steam-assisted gravity drainage technology and various modifications of this technology are used. Low-permeability interlayers, having different location and orientation in the reservoir, shield the vapor chamber advancement and lead to its deformation, which creates additional uncertainties in forecasting the development performance. In addition, high temperatures created during the injection of the heat carrier into the reservoir can have a significant effect on the lithological, petrophysical and mechanical properties of rocks, contributing to the development of microfractures due to the expansion of rock minerals, changes in the chemical composition and filtration-capacitive properties. These changes can cause more intense heat distribution in the formation, increase the coverage of the deposit by thermal action, which ultimately allows for more accurate forecasting of development indicators. Aim. Laboratory studies to investigate temperature effect on the filtration-capacitive properties of rocks in one of the super-viscous oil fields of the Timan-Pechora oil and gas province, developed using the steam-assisted gravity drainage technology. Methods. Experimental methods of study. Results and conclusions. As the studies have shown, thermal effect in the conditions of this object has a noticeable impact on the change of filtration-capacitance properties of both low-permeable and high-permeable rock samples, which can affect the efficiency of the steam-assisted gravity drainage. For citation: Skvortsov A.S., Dementieva K.V., Putilov I.S. Experimental study of thermal effects on rock properties in one of the super-viscouse oil fields of the Timan-Pechora oil and gas province. Bulletin of the Tomsk Polyethnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. xx–xx. https://doi.org/10.18799/24131830/2026/7/5279
Copyright (c) 2026 Skvortsov A.S., Dementieva K.V., Putilov I.S. https://creativecommons.org/licenses/by-nc/4.0
Impact of the spraying parameters of coal-water slurries and their properties on droplet primary atomization in a jet
Relevance. Modern environmental and power challenges dictate the need to switch to clean energy technologies. This is the basis for an active search and creation of innovative sources of energy and fuel. One of the most promising approaches to meeting such requirements while maintaining electricity production at thermal power plants is the use of multicomponent fuel mixtures, for example, coal-water slurries. Aim. Experimental studies of the fragmentation processes of the coal-water slurries jet (quantity, size, shape) at short distances from the nozzle, depending on the spraying parameters and the slurry properties. Object. Experimental studies were carried out with coal-water slurries based on lignite (2B grade) with addition of 1 and 2% by weight of carbon black. A slurry consisting of coal and water, without the addition of the third component, was used as a reference sample. Methods. Coal-water slurries were prepared using a homogenizer with a cavitation effect. A pneumatic nozzle with an internal mixing of the slurry and the spraying agent were used to spray the coal-water slurries. The average size of fuel droplets after spraying was determined using the Interferometric Particle Imaging method. Droplet velocities were determined using the Particle Image Velocimetry method. Results and conclusions. The effect of spraying parameters and the component composition of the slurries on droplet shape, size and velocity was experimentally proven. It was found that the third component, nano dispersed carbon black, contributes to a significant increase in the kinematic viscosity of the slurry and a slight change in its density. Large (more than 1 mm) slurry fragments were proved to be present in a jet in the immediate vicinity of the nozzle at low air pressure (0,1 MPa). Fuel droplets have the shapes of spheres, elongated ellipsoids, and droplets. The spray mode at air pressure of 0,2 MPa is transitional – from a coarse-dispersed gas droplet jet to a finely dispersed one. The number of large droplets and fragments of the slurry increases to 88% with the addition of 2% by weight of nano dispersed carbon black. For citation: Gvozdyakov D.V., Zenkov A.V. Impact of the spraying parameters of coal-water slurries and their properties on droplet primary atomization in a jet. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 36-48. https://doi.org/10.18799/24131830/2026/7/5324
Copyright (c) 2026 D.V. Gvozdyakov, A.V. Zenkov https://creativecommons.org/licenses/by-nc/4.0
Environmental risks of pollution of the Modonkul River bottom sediments, South-Western Transbaikalia
The planning of water management measures in the Modonkul River Basin require a comprehensive studying the heavy metal pollution of bottom sediments flowing through the drainage runoff area of ​​ore deposits and waste from their development. Aim. To determine the environmental risks of pollution of bottom sediments, which can be a source of secondary pollution of surface waters and toxicity to biota. Object. The bottom sediments of the Modonkul River. Method. X-ray fluorescence analysis. Results and conclusions. It was established that when compared the mouth with the upper reaches of the river, the environmental risks of pollution of bottom sediments increase downstream. The accumulation of Cd in bottom sediments increases by 6.3, Cu – 3.2, As – 2.0, Co – 1.5, Pb – 1.8, Mn – 1.5 times. According to the value of the geoaccumulation index, Cd accumulations vary from weak to strong pollution, Pb – from weak to moderate pollution, Cu – weak pollution. The indicators of total pollution and additional load of heavy metals in bottom sediments increase by 3.63 times. According to the classification of the degree of pollution by heavy metals, bottom sediments are characterized as objects of strong pollution. The ecological risk of toxicity of bottom sediments increases by 4.6–5.4 times. During the formation of bottom sediments, the lithogenic contribution decreases for Cd, Pb, Cu to 4–17%, for As, Ni, Zn, Mn to 40–67%. The lithogenic contribution of Co varies within 77–90%. For citation: Khazheeva Z.I., Doroshkevich S.G., Plyusnin A.M. Environmental risks of pollution of the Modonkul River bottom sediments, South-West Transbaikalia. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 49-57. https://doi.org/10.18799/24131830/2026/7/5203
Copyright (c) 2026 Z.I. Khazheeva*, S.G. Doroshkevich, A.M. Plyusnin https://creativecommons.org/licenses/by-nc/4.0
Hydrodynamic modeling of an industrial reactor for sulfuric acid alkylation of isobutane with olefins
Relevance. The need to intensify existing industrial installations for the production of environmentally friendly high-octane alkylbenzene. Dispersion of hydrocarbon and sulfuric acid in the synthesis reactor determines the quality of the resulting gasoline, therefore it is necessary to use a hydrodynamic model of the alkylation contactor, which will allow selecting process parameters to increase the conversion of feedstock components into branched C8 isomers and the quality of the product. Aim. To select hydrodynamic parameters for the synthesis of alkyl gasoline in a sulfuric acid environment, which increases the octane number of the product flow; to identify bottlenecks in the current alkylation contactor. Object. Industrial unit for sulfuric acid alkylation of isobutane with lower olefins using STRATCO technology. Methods. Hydrodynamic model taking into account the heat exothermic reactions of isobutane alkylation with C3–C4 olefins. The model allows calculating hydrodynamic parameters and distribution profiles based on the physicochemical characteristics of the flows. Results and conclusion. The article describes the hydrodynamic model of the contactor for sulfuric acid alkylation of isobutane with olefins, and presents equations for determining the density, heat capacity and thermal conductivity of hydrocarbons. During hydrodynamic calculations, hold-up spots were found in an industrial reactor, which were determined by the distribution profile of the sulfuric acid concentration in the reactor. Using hydrodynamic calculations, the authors estimated heat removal effect on the quality of mixing and the outlet temperature. They calculated thermal conductivity coefficient (λ). The paper shows the possibility of increasing the octane number by more than 0.7 points, and gives the temperature profiles of the alkylation reactor for different thermal conductivity coefficients. For citation: Kopycheva U.N., Chuzlov V.A. Hydrodynamic model of a contactor for sulfuric acid alkylation of isobutane with olefins. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 58-65. https://doi.org/10.18799/24131830/2026/7/5338
Copyright (c) 2026 U.N. Kopycheva, V.A. Chuzlov https://creativecommons.org/licenses/by-nc/4.0
Distribution of iron and manganese in the natural waters of Samarovsky Chugas (Khanty-Mansiysk)
Relevance. Fresh superficial and underground waters are very often used for drinking purposes, especially in settlements without centralized water supply. On the territory of the Khanty-Mansiysk Autonomous district – Ugra, there are many small remote villages, ancestral lands, pastures, where the local population uses the waters of rivers, lakes, or underground waters for drinking purposes (wells or springs, if any, are unloaded on the surface near the settlement). Aim. Study of the concentration levels of total iron and manganese and identification of sources of their entry into fresh underground waters of the Samarovsky Chugas Natural Park. Objects. Fresh waters, at different stages of chemical composition formation, starting with snow (melt waters), surface waters and ending with underground waters taken from wells in the Khanty-Mansiysk territory. Methods. The analysis of chemical composition of natural waters were realized by the following chemical analysis methods: titrimetry, potentiometry, photocolorimetry, etc. Results. Formation of underground waters chemical composition is due to the intensity of water exchange, the lithological structure peculiarities of the territory, as well as the geochemical conditions of the environment. Meltwaters are characterized by minimum contents of iron and manganese (atmospheric stage of formation of chemical composition of underground waters). At the biogenic stage, the soil layer accumulates chemical elements in the aquatic environment with a change in the acid-base balance and total mineralization of surface waters. Further, at the lithogenic stage, rocks rich in iron and manganese are containing the source of entry of the analyzed elements (goethite, siderite, rhodochrosite, pyrochroite). The level of the analyzed elements in the waters reaches an equilibrium state, after which iron and manganese begin to precipitate out of solution, turning into a solid phase. For citation: Romanova T.I., Koshin I.I., Akzhigitova A.V. Distribution of iron and manganese in the natural waters of Samarovsky Chugas (Khanty-Mansiysk). Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 66-77. https://doi.org/10.18799/24131830/2026/7/5249
Copyright (c) 2026 T.I. Romanova, I.I. Koshin, A.V. Akzhigitova https://creativecommons.org/licenses/by-nc/4.0
System analysis of the results of studying filtration in low-permeability formations of the Priobskoe field
Relevance. It is known that horizontal wells with multi-stage hydraulic fracturing are used in the exploitation of low-permeability productive oil formations in Western Siberia. For example, the development of the best parts of the Priobskoe field (with a confident prediction of the boundaries of the reservoirs, their lithological correlation and a reliable prediction of properties by area) by creation of man-made cracks has been virtually completed. The acquisition of additional oil production is associated with the growing role of “deep-water” reservoirs, which are characterized by the absence of clear differentiation of boundaries by seismic data, insufficient predictability of the properties and boundaries of reservoirs, and sharp lithological and facies variability of rocks. It was established that the efficient exploitation of these zones of low-permeability productive formations AC10 and AC12 is possible only in the case of the implementation of a selective plan for the development of the field. This provides for the selective application of methods taking into account the geology of the developed areas, for example, horizontal wells in which transverse cracks are created, ensuring an increase in the contact area of ​​the wellbore with the productive rock, taking into account the minimum horizontal stress. A number of specialists have reached different conclusions on the same exploitation object. This is due to the fact that tracer and microseismic studies revealed the presence of natural barriers and man-made channels of fluid movement in the formation and that crack development is not proceeding in the design direction. This also was revealed at other fields in Western Siberia. In this regard, a systematic analysis of well hydrodynamic survey data and development results is needed: features of the current state of development and the success of reserves development as a result of the formation of a branched system of man-made channels and cracks. Aim. To ensure the implementation of a selective field development plan that includes the use of technologies that form a spatially heterogeneous drainage zone for horizontal wells. Methods. Analytical and numerical modeling tools, pressure recovery and stabilization curves. Results and conclusions. As a result of computational experiments and calculation of waterflooding efficiency in the absence of impermeable barrier boundaries and isotropic permeability of the formation in the injection zone, it was established that the design value of oil production volume is achieved. For citation: Bikkulov M.M., Grachev S.I., Semenenko A.F., Gracheva S.K. System analysis of the results of studying filtration in low-permeability formations of the Priobskoe field. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 78-87. https://doi.org/10.18799/24131830/2026/7/5264
Copyright (c) 2026 M.M. Bikkulov, S.I. Grachev, A.F. Semenenko, S.K. Gracheva https://creativecommons.org/licenses/by-nc/4.0
Features of the technogenic geochemical background in the soil cover of mining-industrial areas in the Perm Krai
Relevance. Vast territories outside the zones of direct impact of industrial facilities and large settlements, retaining signs of normal zonal development, nevertheless experience anthropogenic load that does not lead to the loss of stability of geosystems. All the effects, overlapping each other, gradually transform the natural zonal geochemical background of the territory, forming a technogenic background. Aim. To analyze the geochemical features in the soils of territories outside the areas of direct anthropogenic impact and the specifics of the forming technogenic background of mining and industrial areas. Object. Soils of the territory of Verkhnekamsk industrial district (Perm region, Russia). The research was carried out in the territories with different anthropogenic load. Methods. System analysis, including the analysis of patterns of development of natural systems, generalization and statistical processing of empirical data. Geochemical and statistical methods were used to determine the anthropogenic background. Results. Ecological condition of soils adjacent to industrial areas, assessed by the refined pollution index S, is characterized in the rank “anthropogenic background”. In spite of different intensity of technogenic load, the soils of the areas adjacent to industrial territories differ little from the soils of background areas by geochemical features. The technogenic geochemical background is characterized by cadmium accumulation relative to the clark of the upper part of the continental crust, accumulation of elements relative to the background area in the form of geochemical series: Ni>Cd>Cu, Zn, Pb>As. For citation: Karavaeva Т.I., Tikhonov V.P., Belkin P.A., Khalilov R.I. Features of the technogenic geochemical background in the soil cover of mining-industrial areas in the Perm Krai. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 88-100. https://doi.org/10.18799/24131830/2026/7/5128
Copyright (c) 2026 Karavaeva Т.I., Tikhonov V.P., Belkin P.A., Khalilov R.I. https://creativecommons.org/licenses/by-nc/4.0
Geological and geochemical characteristics of the Riphean sediments of the Kamsko-Belsky trough based on drilling data from the Arlanskaya-7000 parametric well and adjacent areas
Relevance. The need to study the Riphean deposits of the Kamsko-Belsky trough, which is a promising but poorly studied object in relation to oil and gas potential in the east of the Russian Plate. At the same time, a detailed study of the geological and geochemical features of the Riphean deposits of the Kamsko-Belsky trough is especially relevant to understand their generation capabilities. Aim. To study the Riphean deposits of the northern axial zone of the Kamsko-Belsky trough based on drilling materials from the Arlanskaya-7000 parametric well and adjacent areas. Objects. Riphean deposits of the Kamsko-Belsky trough. Methods. Analysis of published, stock and archival materials on the geological, tectonic structure, oil and gas potential of the territory, luminescent-bituminous analysis, statistical analysis of geochemical data. Results. The paper demonstrates the features of the geological and tectonic structure of the territory, gives the lithological characteristics of the Riphaean rocks based on the results of the study of Arlanskaya-7000parametric well, the section of which is stratotypic for the lower Riphean. The authors have carried out the analysis of the revealed oil and gas potential of the studied territory. Oil and gas core occurrences were mainly detected in the Arlanskaya and Ashitskaya sub-formations of the lower Riphean and the Olkhovskaya and Tukayevskaya formations of the middle Riphean. Based on the analytical processing and systematization of the results of geochemical studies of 12 wells, the authors gave the geological and geochemical characteristics of the Riphean deposits of the northern axial zone of the Kamsko-Belsky trough. According to a few factual data, oil-bearing rocks were identified at all stratigraphic levels in the Kaltasin formation of the Lower Riphean, which confirms the previously established regional development of the generational Kaltasin formation in the Kamsko-Belsky trough. The results obtained indicate the need for further study of the sections of wells that have exposed the Riphaean deposits by comprehensive laboratory and analytical studies, which will make it possible to more effectively study the prospects for oil and gas content of the Riphaean deposits in the Kamsko-Belsky trough. For citation: Bashkova S.E., Chevtaeva A.K. Geological and geochemical characteristics of the Riphean sediments of the Kamsko-Belsky trough based on drilling data from the Arlanskaya-7000 parametric well and adjacent areas. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 101-112. https://doi.org/10.18799/24131830/2026/7/5245
Copyright (c) 2026 S.E. Bashkova, A.K. Chevtaeva https://creativecommons.org/licenses/by-nc/4.0
Designing a digital twin of a crude oil heating system
This article is devoted to the design of a digital twin of a crude oil heating system. For the successful functioning of the oil industry, it is very important to control the parameters of ongoing processes and indicators of devices and equipment involved in the production process. Every year, there is an increasing automation of the extraction and transportation processes to detect temperature changes in a timely manner. Lowering the oil temperature to the crystallization temperature of the paraffins in its composition is a favorable factor for the formation of asphalt-resin-paraffin deposits on the inner wall of the pipeline, which may be a factor that first reduces the productivity of the pipeline, and then completely prevents it. Therefore, the issues of the relevance of integrating the technology of digital deposits come to the fore. The aim of the work is to study various techniques and technologies to prevent the appearance and removal of asphalt-resin-paraffin deposits and, as a result, to develop a mathematical model of the temperature field of an oil pipeline and conduct an experiment simulating the oil flow inside the pipeline to measure the temperature of the liquid. In order to solve the tasks set, the article analyzes the state of the oil industry, examines the issues of ensuring industrial safety measures and limiting the harmful effects of the oil production on the environment. The article describes the characteristics and chemical composition of asphalt-resin-paraffin deposits, the causes of their occurrence and the mechanism of formation, methods of combating asphalt-resin-paraffin deposits. As a result, a digital twin model of the crude oil heating system was developed, an experiment was conducted that proved the system operability and confirmed its ability to respond to changes in the temperature field of the oil emulsion inside the pipeline. For citation: Stolbovskaya N.V., Esipova K.I., Pasternak S.N., Turovskaya L.G., Davydov T.G. Designing a digital twin of a crude oil heating system. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 113-124. https://doi.org/10.18799/24131830/2026/7/5027
Copyright (c) 2026 Stolbovskaya N.V., Esipova K.I., Pasternak S.N., Turovskaya L.G., Davydov T.G https://creativecommons.org/licenses/by-nc/4.0
The influence of dynamic and geodynamic processes on the distribution of hydrocarbon-bearing regions
Relevance. The South Caspian megadepression is a structurally and geodynamically complex region where the formation and spatial distribution of hydrocarbon accumulations are controlled by an interplay of tectonic, lithofacies, and dynamic stress factors. Aim. To determine the orientation of predominantly submeridional belts associated with both active and passive continental margins and to evaluate whether their distribution reflects deep geodynamic processes and dynamic stresses induced by Earth rotation and gravitational interactions with celestial bodies. Methods. The study is based on an integrated regional comparative and geodynamic analysis of global and regional hydrocarbon basins. Tectonic maps, lithospheric plate reconstructions, and geological data were analyzed to evaluate the spatial relationships between hydrocarbon belts, subduction zones, rift systems, and passive continental margins. A comparative assessment of selected petroleum provinces, including the South Caspian Basin, was performed to determine how lithospheric stress fields, plate motions, and basin orientation control hydrocarbon accumulation and prospectivity. Structural trends were evaluated using regional tectonic maps and plate reconstructions, whereas geodynamic interpretation was performed through qualitative integration of plate kinematics, regional stress-field orientation, and basin evolution models. Conclusion. Alternating compressional and extensional forces along deep fractures have periodically replenished both sedimentary and crystalline reservoirs with fluids, sustaining continuous hydrocarbon generation in this “cold” basin. Vertical movements of lithospheric blocks, driven by these geodynamic processes, created zones of uplift and subsidence, promoting denudation in elevated areas and sediment accumulation in depressions. This structural heterogeneity created optimal conditions for organic matter deposition and hydrocarbon entrapment. Overall, the distribution of hydrocarbon accumulations in the South Caspian megadepression demonstrates a direct link to both global-scale geodynamic processes and local dynamic stress fields. Understanding these interactions is essential for evaluating petroleum potential in structurally complex basins and integrating tectonic, geophysical, and dynamic analyses for hydrocarbon exploration. For citation: Nasibova G.J., Ganbarova Sh.A. The influence of dynamic and geodynamic processes on the distribution of hydrocarbon-bearing regions. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 125-136. https://doi.org/10.18799/24131830/2026/7/5602
Copyright (c) 2026 Nasibova G.J., Ganbarova Sh.A. https://creativecommons.org/licenses/by-nc/4.0
Thermoelectric effects in higher fatty alcohols
Relevance. Currently, an active search is underway for alternative energy sources. Electrical effects that occur in the field of phase transitions during the directed crystallization of organic dielectrics can be the energy source. Aim. To study the effect of the physico-chemical properties and component composition of higher fatty alcohols on their phase states and the interelectrode potential difference during their crystallization. Methods.The effect of physico-chemical properties of individual even fatty alcohols (FA) C10–22, as well as fractions of fatty alcohols C20+ and C20–22 on thermoelectric effects during their crystallization has been studied by methods of temperature electrometry and differential scanning calorimetry. Results and conclusions. In the field of crystallization and solid-phase transitions of higher fatty alcohols the authors found thermoelectric effects ∆φ reaching 128.5 mV. The crystallization of alcohols is accompanied by the generation and emission of electric charge carriers, which are interpreted as thermoelectric effects. It is shown that the thermoelectric effects in individual fatty alcohols increase with growth in their molecular weight in the range from C10 to C20, followed by a decrease for alcohol C22. The temperature ranges of the existence of electric potentials in alkane alcohols depend on their molar mass, chemical and fractional composition. The temperature ranges of phase transitions and phase states for individual higher fatty alcohols are determined only using differential scanning calorimetry. Phase transitions and phase states of the fractions of higher fatty alcohols are identified according to the data of higher fatty alcohols and temperature electrometry. The melting and crystallization temperatures of higher fatty alcohols were found to correspond according to electrometry and differential scanning calorimetry, as well as their correspondence to literary data. The authors obtained with a high degree of approximation the correlation equations linking the physicochemical properties of individual fatty alcohols with their molar mass and refractive index at 100 ℃. The relationship between thermoelectric effects and phase states of fatty alcohols were established. Electrometric effects in fatty alcohols are inherent only for weakly packed crystal structures – for the hexagonal structure (rot2-state) and for the rot1-state. To assess the stability of thermoelectric potentials in fatty alcohols, the authors proposed the coefficients characterizing their temperature depolarization. For citation: Agaev S.G., Yakovlev N.S., Zanochuev S.A., Bayda A.A., Tyulkov M.A. Thermoelectric effects in fatty alcohols. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 137-149. https://doi.org/10.18799/24131830/2026/7/5076
Copyright (c) 2026 Agaev S.G., Yakovlev N.S., Zanochuev S.A., Bayda A.A., Tyulkov M.A. https://creativecommons.org/licenses/by-nc/4.0
Analysis of vortex structures in the mixing head of a syngas generator
Relevance. The efficiency of syngas generators for small-scale methanol production is determined by the quality of mixing of the initial components – methane and oxygen – in the mixing head, which in its turn depends on complex vortex dynamics. Previously an optimal mixing head configuration was proposed; however, the physical mechanisms explaining its advantage and quantitative criteria for comparison with alternative designs were not analyzed in detail. Aim. Comparative analysis of vortex structures in various mixing head configurations and substantiation of the optimal design ensuring maximum mixing completeness with minimum pressure drop and the absence of stagnation zones. Methods. Numerical simulation in the ANSYS Fluent 2020 R2 software package using the standard k-ε turbulence model and the Eddy Dissipation Model. Results and conclusions. Using ten design variants, it is shown that coaxial arrangement of centrifugal injectors leads to the formation of a stable toroidal vortex and an extensive stagnation zone in the chamber center, drastically worsening mixing. Unidirectional swirl of the flows generates a precessing vortex core that blocks mass transfer. Conversely, fuel injection through six jet injectors at an angle of 45° into the cavity of the centrifugal oxidizer injector creates intense shear turbulence, breaks up large-scale vortices, and eliminates the stagnation zone, ensuring complete mixing over a length of 30 mm. The obtained results reveal the physical reasons for the effectiveness of the previously selected optimal configuration. For citation: Gashevskiy E.M., Kuzmin A.M. Analysis of vortex structures in the mixing head of a syngas generator. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 150-159. https://doi.org/10.18799/24131830/2026/7/5695
Copyright (c) 2026 Gashevskiy E.M., Kuzmin A.M. https://creativecommons.org/licenses/by-nc/4.0
Development of a mathematical model for vacuum gas oil hydrocracking based on experimental and numerical studies
Relevance. Modern refineries must increase conversion depth of heavy crude feedstocks while meeting stringent environmental standards for fuels. In this context, vacuum gas oil hydrocracking serves as a key technology for producing high-quality light petroleum products. Developing accurate mathematical models that account for complex hydrocarbon composition and catalytic process features has become essential for refinery digitalization. Aim. To develop a mathematical model of vacuum gas oil hydrocracking based on integrated experimental and numerical studies. Methods. Laboratory tests were performed in a catalytic reactor using a commercial Ni-W catalyst at temperatures from 400 to 420 °C. Product composition was analyzed by chromatographic techniques. Structure-oriented lumping approach is used combined with group contribution method to describe petroleum fractions. This approach enabled the creation of an extended component library with calculated physicochemical and thermodynamic properties. Components were grouped into 74 lumps based on structural features and carbon number. The model was formulated as a system of differential equations that includes material and energy balances. Results and conclusions. A detailed kinetic scheme was constructed using the lumped components and composed of 330 elementary hydrogen-involving reactions. Kinetic parameters were identified by solving an inverse problem using experimental data. The resulting model accurately reproduces product composition and can optimize industrial process conditions, including hydrogen-rich gas flow rate and temperature. For citation: Grigorash M.S., Ivashkina E.N., Dementyev A.Yu., Chekmeneva D.V., Vaganov R.A., Chuzlov V.A., Boev A.S. Development of a mathematical model for vacuum gas oil hydrocracking based on experimental and numerical studies. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 160-172. https://doi.org/10.18799/24131830/2026/7/5453
Copyright (c) 2026 Grigorash M.S., Ivashkina E.N., Dementyev A.Yu., Chekmeneva D.V., Vaganov R.A., Chuzlov V.A., Boev A.S. https://creativecommons.org/licenses/by-nc/4.0
The influence of wettability on oil displacement processes in porous media: a comprehensive approach based on micro-computed tomography data, numerical and hydrodynamic modelling
Wettability is a fundamental parameter governing phase distribution, capillary behaviour and the overall efficiency of waterflooding in hydrocarbon reservoirs. This study presents an integrated multi-scale framework for assessing the impact of wettability on two-phase displacement mechanisms by combining micro-computed tomography (micro-CT), direct numerical simulation (DNS) of immiscible flow within a digital core, and three-dimensional reservoir simulation. At the pore scale, strongly water-wet conditions promote uniform front propagation, reduced residual oil saturation and efficient pore-space drainage, whereas oil-wet systems exhibit pronounced capillary trapping and early-front instabilities. Reservoir-scale simulation demonstrates consistent trends, with displacement efficiencies reaching 0.94 in water-wet rocks and decreasing to 0.51 under oil-wet conditions. The integration of pore- and reservoir-scale results provides a coherent understanding of wettability-controlled displacement dynamics and highlights wettability alteration towards more water-wet states as a significant opportunity for improving ultimate oil recovery and enhancing waterflood performance. For citation: Lvov I.A., Badlyuk A.A. Wettability impact on oil displacement processes in porous media: a comprehensive approach based on micro-computed tomography data, numerical and hydrodynamic modelling. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 173-186. https://doi.org/10.18799/24131830/2026/7/5427
Copyright (c) 2026 Lvov I.A., Badlyuk A.A. https://creativecommons.org/licenses/by-nc/4.0
Advancing SDG 7: a hybrid LASSO-RFR approach for enhanced solar energy forecasting in extreme weather conditions
Relevance. This study is focused on the use of hybrid models in environmental analytics, especially in areas like Siberia, which have highly dynamic short-term climate variables. Findings from the research further advance strategies for efficient and reliable renewable energy system operation by assisting decision-making, such that it improves their management and planning. The study introduces a novel application of a hybrid LASSO-RFR model to solar power prediction in extreme climatic conditions, offering a methodologically innovative and practical tool for improving the accuracy of renewable energy forecasts. This contributes to the broader goal of sustainable energy transition as outlined in SDG7. Aim. Enhance the predictive accuracy of solar power availability in Siberia. Develop a robust hybrid machine learning model with outstanding capabilities. Contribute to SDG7 through improved renewable energy forecasts. Methods. This system combines statistical modelling and machine learning techniques, utilising LASSO for feature selection and Random Forest Regression to handle complicated data relationships, thus tackling the challenges of non-linear, high-dimensional datasets in predicting solar power generation. A hybrid LASSO-RFR approach is employed to forecast solar power output. The method combines LASSO capability for feature reduction and RFR robustness in predictive accuracy. Data collected includes the ones on solar radiation, temperature, humidity, and wind speed in Tomsk and Siberia, spanning January 2021 to January 2024. Results and conclusions. The proposed hybrid model outperformed all individual models in terms of forecasting accuracy (in its optimal configuration, the MSE value was 0.006 with R-squared, 85.7%) and showed great potential to accurately predict solar power output which is essential for effectively coping with renewable energy source variability. For citation: Akpuluma D., Yurchenko A.V., Alkahderi L.A., Abam J.I., Firoz N., Tamunomiebi G., Belan B.D. Advancing SDG 7: a hybrid LASSO-RFR approach for enhanced solar energy forecasting in extreme weather conditions. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 187-197. https://doi.org/10.18799/24131830/2026/7/5132
Copyright (c) 2026 Akpuluma D., Yurchenko A.V., Alkahderi L.A., Abam J.I., Firoz N., Tamunomiebi G., Belan B.D. https://creativecommons.org/licenses/by-nc/4.0
Monitoring of oil and gas pipelines using an unmanned aerial vehicle with reduced vibration of drive electric motors through the use of a damper with a cellular structure
Relevance. This article examines the pressing issue of reducing vibration activity onboard unmanned aerial vehicle-based oil and gas pipeline monitoring devices. Unmanned aerial vehicle onboard equipment, particularly optical instruments used for photography and videography, is susceptible to vibration from electric motors. This vibration degrades the quality of the resulting images. An assessment of the vibration activity of electric motors reveals that the sources of vibration have various physical origins: imbalances, electromagnetic phenomena, ball bearing errors, manufacturing defects in structural components, and assembly quality. Since completely eliminating the vibration activity of electric motors is technically impossible, it is advisable to reduce it through a technical solution by introducing a damping element into the kinematic chain of the vibration source. Specifically, a damper design based on a cellular structure is proposed to minimize the impact of vibration from electric motors. A study of the effectiveness of the developed damper prototype was conducted using laser Doppler vibrometry, a method that has been rapidly developing over the past decade. The equipment allowed for contactless recording of vibrations on the surface of vibrating components, which is essential for non-destructive testing of structures. The study demonstrated that different cellular structures of the damper body have different effects on its effectiveness. The damper, based on a "cross-shaped" cellular structure, reduced the vibration level emitted by the electric motor by 53%, confirming its suitability for this study. Object. Cellular damper manufactured using additive manufacturing. Aim. To develop a design for a damper prototype with a cellular structure and evaluate the effectiveness of its application for reducing vibration activity on board a device for monitoring oil and gas pipelines. Methods. Modern vibration diagnostics approaches, computational mathematics methods, and modern vibration measurement tools. Results. The developed damper minimizes the vibration amplitude level by 53% in the range of operating speeds of the electric motor shaft. For citation: Ermakov D.V., Derusova D.A., Shpilnoy V.Yu., Gavrilin A.N., Lee A.P. Monitoring of oil and gas pipelines using an unmanned aerial vehicle with reduced vibration of drive electric motors through the use of a damper with a cellular structure. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 198-207. https://doi.org/10.18799/24131830/2026/7/5638
Copyright (c) 2026 Ermakov D.V., Derusova D.A., Shpilnoy V.Yu., Gavrilin A.N., Lee A.P. https://creativecommons.org/licenses/by-nc/4.0
Modern directions of using lignin derivatives
Relevance. The article is devoted to an overview of the main directions of practical use of the natural polymer lignin and its derivatives, in particular lignosulfonates of various production methods. The current situation is when lignosulfonates from both sulfite and neutral sulfite production methods are used extremely irrationally and most of them are high-tonnage waste, polluting the environment, while potentially they are valuable renewable raw materials of natural origin. The paper introduces the annual statistical data on the production of various lignosulfonates, and show some promising areas in modern conditions of industrial import substitution, related to the production of in-demand products relevant to various sectors of the Russian economy and where lignins and lignosulfonates are the raw material base. To substantiate the possibility of using ligno derivatives, information is provided on the results of a study of physico-chemical properties published in the press in different years, both in foreign and domestic publications. The article also contains some experimental data obtained by the authors of this review, which either confirms or refutes the published information in accordance with the current state of the lignosulfonate market, when economic, technological, raw materials and production factors are significantly changing. Aim. Comparison and analysis of accumulated information on the main areas of use of lignosulfonates as domestic renewable raw materials. Objects. Lignosulfonates and sulfite liquors obtained by various methods of delignification of a natural polymer – wood. Methods. Methods of analytical chemistry (potentiometry, conductometry, spectrophotometry) and chemical technology (hydrolysis, evaporation, heat treatment, acid treatment, fractionation). Results and conclusions. The information provided showed that lignosulfonates can be reasonably transferred from the category of multi-tonnage waste to a promising category of raw materials, on the basis of which chemical technology methods can be used to produce products for the construction industry (plasticizers for concrete), additives to lubricating greases to reduce friction loads and improve tribological properties; biosystems based on cross-linked gels, uronic acid esters; transport systems for the flotation of natural ores. It is important that the use of the pentosan-containing component of neutral sulfite lignosulfonates is promising for the production of furfural, while the hexosan-containing fraction is promising for the restoration and development of hydrolysis production associated with the obtaining of alcohol, fermentation feed products, and vanillin. For citation: Teptereva G.A., Rolnik L.Z., Ivanchina E.A., Naumova D.S., Lukmanova I.F., Agishev R.E., Dimitriev E.N., Ilminsky M.V., Naumov S.V., Kazyeva A.I. Modern directions of using lignin derivatives. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 208-227. https://doi.org/10.18799/24131830/2026/7/5481
Copyright (c) 2026 Teptereva G.A., Rolnik L.Z., Ivanchina E.A., Naumova D.S., Lukmanova I.F., Agishev R.E., Dimitriev E.N., Ilminsky M.V., Naumov S.V., Kazyeva A.I. https://creativecommons.org/licenses/by-nc/4.0
Impact of relative permeability and capillary pressure parameterization on the inversion results of unsteady-state core flooding data
Relevance. Simultaneous estimation of relative permeability and capillary pressure-saturation functions from unsteady-state core flooding experiments is considered a promising way to reduce the scope of laboratory measurements. However, practical application of this approach is complicated by the non-uniqueness of the inverse problem, the limitation of experimental data, and the dependence of the result on the selected representation of the target curves. Under these conditions, the type of parameterization of relative permeability and capillary pressure curves becomes one of the key factors controlling both the quality of curve reconstruction and the uncertainty assessment. Aim. To evaluate the impact of the parameterization of relative permeability and capillary pressure on the results of numerical inversion and on the subsequent uncertainty quantification. Methods. Two approaches for describing the target functions were considered: analytical parameterization based on the Corey–Brooks and Skjaeveland models, and pointwise parameterization at saturation nodes. The analysis was performed on three two-phase computational experiments of unsteady-state oil displacement by water: a baseline synthetic case with smooth curves, a more complex synthetic case with variable curvature of the functions, and a digital LBM-based experiment at the pore scale. The inverse problem was solved using gradient-based optimization combined with an ensemble-based uncertainty analysis over multiple initial models. Results and conclusions. It was shown that analytical parameterization provides fast inversion and acceptable reconstruction for simple smooth curves, but leads to biased solutions and underestimated uncertainty bounds when the true saturation functions have a complex shape. In some cases, analytical models fail to reproduce complex saturation profiles and yield non-physical capillary pressure estimates. Pointwise parameterization is computationally more expensive, but it allows a wider class of functional shapes to be represented, provides a better match to complex experimental data, and produces more realistic confidence intervals. It is concluded that analytical parameterization is suitable for rapid estimates and simple cases, whereas the pointwise approach is a more reliable tool for reconstructing complex relative permeability and capillary pressure curves and for consistent uncertainty assessment. For citation: Dzharkinov R.B., Fokin M.I., Duchkov A.A., Krutko V.V., Avdonin A.S. Impact of relative permeability and capillary pressure parameterization on the inversion results of unsteady-state core flooding data. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 228-246. https://doi.org/10.18799/24131830/2026/7/5739
Copyright (c) 2026 Dzharkinov R.B., Fokin M.I., Duchkov A.A., Krutko V.V., Avdonin A.S. https://creativecommons.org/licenses/by-nc/4.0
Development of solar and wind energy in Siberia with the participation of China
The article examines the prospects for implementing renewable energy sources in the Siberian region by leveraging China expertise and technologies. Relevance. The study is highly relevant due to the global shift toward a low-carbon economy, the need to diversify Russian energy sector, and Siberia vast potential for renewable energy sources. China, as the world leader in renewable energy sources production and utilization, emerges as a strategic partner capable of accelerating this process through its technological and investment capabilities. Siberia proximity to China and the growing bilateral trade turnover ($245 billion in 2024) underscore the importance of cooperation within the framework of the Belt and Road Initiative and the commitments of the Paris Agreement. Aim. To assess the potential for renewable energy sources development in Siberia by drawing on Chinese experience, analyzing the region climatic, geographical, and economic features, and proposing recommendations for joint projects. Methods. Comparative analysis of Russian and Chinese energy strategies, statistical data from Russian Ministry of Energy, Chinese National Energy Administration, IRENA, and the IEA, alongside an examination of Siberia climatic and geographical conditions. Results. Siberia has significant renewable energy sources potential (wind – 200–300 GW, solar – 1200–1400 kWh/m² annually), yet renewable energy sources accounts for only 2.1 GW of the region 50 GW total capacity. China, with a renewable energy sources capacity of 1479 GW and $271 billion invested in 2023, offers a successful model applicable to Siberia. Conclusions. Collaboration with China, encompassing technology transfers, investments, and cross-border energy networks, could reduce CO2 emissions by 50–100 million tons annually, create 5000–10000 jobs, and generate $250–500 million yearly from energy exports. Recommendations include strengthening state support, adapting Chinese technologies, and developing local equipment production. For citation: Iuritskii S.A. Development of solar and wind energy in Siberia with the participation of China. Bulletin of the Tomsk Polytechnic University. Geo Assets Engineering, 2026, vol. 337, no. 7, pp. 247-260. https://doi.org/10.18799/24131830/2026/7/5096
Copyright (c) 2026 Iuritskii S.A. https://creativecommons.org/licenses/by-nc/4.0