Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu最新文献

{"title":"Recycling of barite ore tailings into porcelain: microstructure and dielectric properties","authors":"O. Djezairi, A. Bouzidi, N. Bouzidi, B. Ayaden, A. Benselhoub","doi":"10.33271/nvngu/2023-6/048","DOIUrl":"https://doi.org/10.33271/nvngu/2023-6/048","url":null,"abstract":"Purpose. To study the dielectric properties of porcelain obtained from a mixture of sand, kaolin, and feldspar. The latter has been partially substituted with solid barite wastes (SBWs). Methodology. The study involves preparation of porcelain using conventional solid-state reaction methods, employing two firing temperatures (1200 and 1300 °C) and a soaking time of 3 hours. SBWs are progressively added to the mixtures at levels of 0, 10, 20 and 30 wt%, replacing feldspar content. Structural and dielectric characterizations are conducted to examine the influence of SBWs substitution on macroscopic dielectric properties. Microstructural observations reveal various crystalline phases and micropores, contributing to property effects. Following sintering at 1200 °C, primary mineralogical phases include mullite, anorthite, and quartz. At 1300 °C, the celsian phase emerges alongside anorthite and quartz phases. The technological attributes of the produced porcelain samples, encompassing dilatometric properties, apparent density, and porosity, are determined. Findings. Dielectric characterization, conducted within the frequency range of 102–105 Hz, demonstrates that the relative constant permittivity values rise from 4.3 to 7.4 for samples sintered at 1200 °C and from 5.1 to 9.9 for those fired at 1300 °C, specifically for samples containing 10 wt% SBWs. Additionally, the dielectric loss tangent decreases with increasing sintering temperature. The macroscopic permittivity of porcelains can be accurately calculated using a mixing rule, which aligns well with experimental results. Originality. The original contribution lies in the use of 10 wt% Solid Barite Wastes (SBWs) from the Boucaid mine in order to effectively create environmentally friendly porcelain insulators. The study showcases the potential of SBWs as a partial substitute, thus promoting sustainability in porcelain insulator production. Practical value. The results of this study hold practical significance for the ceramics and insulator manufacturing industries by providing insights into enhancing the dielectric properties of porcelain through the incorporation of SBWs. This approach contributes to the production of environmentally friendly insulators.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139162504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peculiarities of truck transportation in wartime conditions","authors":"S. Minakova, T. Volobuyeva, V. Minakov, O. Minakova, A. Tselikova","doi":"10.33271/nvngu/2023-6/184","DOIUrl":"https://doi.org/10.33271/nvngu/2023-6/184","url":null,"abstract":"Purpose. To identify the peculiarities and problems of automobile transport (AT) in the war conditions (WC) in Ukraine. To propose ways to solve the mentioned problems, to eliminate reasons that lead to an increase in the risks for AT. To develop a mathematical model for optimization of transportation by AT under unclear military risks. Methodology. The method of abstract-logical analysis made it possible to establish peculiarities and problems of AT in WC and propose ways to solve these problems, to eliminate the causes that lead to increase in risks of AT. The method of analysis and synthesis is used to determine the circumstances of the narrowing of the influence of institutional approaches on the optimization of AT and to propose a combination of direct and indirect institutional influence. The method of comparative analysis finds that the unevenness of risks on transport routes leads to the imbalance of transportation and proposes measures to reduce the level of imbalance, to approach optimal results as well as proposes the formation of multi-stage transportation, which will ensure the variability of transport chains due to fragmentation and an increase in the level of organization of transport networks. Mathematical methods were applied to develop a model for optimization of AT in WC. Findings. The key tasks of building a strategy of a highly adaptive transport system were formulated and its peculiarities were indicated. Circumstances of narrowing the influence of institutional approaches to AT in WC were established and a combination of direct and indirect institutional influence was proposed, which will be based on the developed mathematical model. It is established that unevenness of risks on transport routes leads to imbalance of transportation and measures to reduce the imbalance are proposed. The formation of multi-stage transportation is proposed for variability of transport chains, organization of transport networks and ensuring the reliability of AT. Originality. To take into account risks with a significant level of uncertainty, a strategy for building a highly adaptive transport system was proposed, and a mathematical model for optimization of AT in the presence of uncertain military risks was developed. Practical values. The peculiarities and problems of AT in the conditions of the war in Ukraine are given. Ways to solve the mentioned problems, to eliminate the causes that lead to increase in risks for AT are proposed.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"186 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139163114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A methodological approach to assessing the durability of welded structures of screens using SolidWorks Simulation software","authors":"A. Shkut","doi":"10.33271/nvngu/2023-6/079","DOIUrl":"https://doi.org/10.33271/nvngu/2023-6/079","url":null,"abstract":"Purpose. To develop methodological recommendations for studying the characteristics of screen welded assemblies of ГВЧ-31 С type using specialized tools of the SolidWorks Education Edition software package. Methodology. The methodology for analyzing welds when designing a vibrator fixation system is based on the use of current software tools, in particular SolidWorks Simulation in combination with SolidWorks Motion, as well as the HOT SPOT STRESS technology. To analyze the accuracy of determining the dynamic loads arising during the screen operation, the results of modeling using the SolidWorks Motion program are compared with those obtained by traditional methods using the Lagrange equation of the second kind. The computation discrepancy is within 10 %. Findings. It has been determined that it is rational to analyze welds using the SolidWorks Education Edition software shell, taking into account the least profitable option, namely, when their edges are not finished. Furthermore, during solid-state modeling, the formation of a cavity in the weld is simulated in the form of a gap between the welded elements. The stress-strain state analysis of welded constructions using the Finite Element Method has revealed that when the computational mesh cell size is reduced, the stress value increases significantly, which indicates the result singularity and the need for further application of the HOT SPOT STRESS method. In the course of research, it has been determined that the highest stresses in welds occur on the central rib. The duration of use of welded joints is more than 2·106 cycles. Originality. For the first time, the methodology has been substantiated for determining the service life of welded elements of screen constructions using the latest computer analysis tools. The method makes it possible to calculate the dynamic forces arising in constructions performing oscillatory movements, as well as to analyze the stress-strain state of welds using the HOT SPOT STRESS technology and assess their service life. Practical value. It has become possible to implement the method for calculating the stress-strain state of welds in the design of a vibrator fixation system and assessing their service life, which is important for analyzing and determining the parameters of various vibrating machines. The results derived from the investigation were incorporated by the local entity, Ukrprommineral, to modernize the screens.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"59 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139162900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of backscattering ultrasound parameters for iron ore varieties recognition","authors":"V. S. Morkun, N. Morkun, V. Tron, O. Serdiuk, A. Haponenko","doi":"10.33271/nvngu/2023-6/019","DOIUrl":"https://doi.org/10.33271/nvngu/2023-6/019","url":null,"abstract":"Purpose. Development of the method for recognizing the main mineral-technological varieties of iron ore in the deposits being developed by selecting an analytical model for the spectral characteristics of the received ultrasonic echo signals and quantitative assessment of their parameters. Methodology. The work uses methods for modeling the processes of propagation of ultrasonic waves in a randomly heterogeneous medium. The process of backscattering of ultrasound in mineral structures formed by inclusions of iron ore of various varieties and associated rock was considered. The estimated parameters of the spectral characteristics of the inversely scattered probing ultrasound pulse were studied. Findings. A method for recognizing the main mineral and technological varieties of iron ore of the deposit being developed, based on the parameters of the propagation of ultrasonic waves in the studied samples, was proposed. This is achieved by selecting an analytical model for the spectral characteristics of the received echo signals and quantifying their parameters. The amplitude of the echo signal and its spectral properties depends on the size and concentration of the scatterers, i.e., the structural and textural features of the iron ore sample under study. Taking into account these factors, the extracted parameters of the model were used to identify the main mineralogical and technological varieties of iron ore of the studied deposit. Originality. The proposed method for recognizing mineral-technological varieties of iron ore differs from the known ones in that the amplitude, central frequency, and bandwidth of the amplitude spectrum of the Gaussian parametric model of the measured echo signals are used as evaluation parameters. Practical value. The proposed scientific and technical solution allows for operational non-destructive control of the main mineralogical and technological types of iron ore in the process of its extraction and processing.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"27 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creation of conceptual solutions for the manufacture of component freight wagons from composites","authors":"O. V Fomin, A. M Fomina, S. M Turpak, O. O Padchenko","doi":"10.33271/nvngu/2023-5/102","DOIUrl":"https://doi.org/10.33271/nvngu/2023-5/102","url":null,"abstract":"Purpose. To present the results on the possibility of increasing the efficiency of the use of the operated fleet of freight wagons by creating conceptual solutions for the manufacture of their component load-bearing systems from composites. Methodology. To increase the efficiency of using the operating fleet of freight wagons measures are offered on the development of conceptual solutions for the manufacture of their components load-bearing systems made of composites. In order to determine the possibility of service life of the basic structures of the freight wagons, the methodology given in the works by A. V. Afanasyev was used. To study the dynamic loading of the freight wagon with the actual dimensions of the constituent elements, a calculation was made. At the same time, a mathematical model was used, formed by Professor G. I. Bogomaz, taking into account its adaptation to the determination of the dynamic loading. The vertical loading of the load-bearing structure of the freight wagon was also investigated. In this regard, a mathematical model formed by Professor Yu. V. Demin was used. The accelerations obtained in the simulation of dynamic loading were taken into account when calculating the strength of the basic structure of the freight wagon. Findings. It has been established that the design service life of the load-bearing structure of a freight wagon is at least 50 years. The results of determining the longitudinal loading of the basic structures of the freight wagon established that the acceleration acting on it is 37.7 m/s2, and with the vertical one – 5.5 m/s2. The strength calculation of the basic structure of a freight wagon showed that the maximum equivalent stresses are recorded in the zone of interaction of the center beam with the pivot and amount to 333.4 MPa, i.e. do not exceed the permissible values. Originality. The feasibility of manufacturing component load-carrying systems of freight wagons from composites is substantiated. Practical value. The research carried out will contribute to an increase in the efficiency of the use of railway transport, the transportation process through international transport corridors, as well as the creation of developments in the design of multifunctional car structures.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptation of business and consumers to modern challenges in Ukraine","authors":"I Bila, L Zakrevska, I Kovalchuk, O Tkachenko, O Shevchenko","doi":"10.33271/nvngu/2023-5/178","DOIUrl":"https://doi.org/10.33271/nvngu/2023-5/178","url":null,"abstract":"Purpose. To study the process of adaptation and identify factors influencing the adaptability of business and consumers. To develop recommendations for increasing the level of adaptation of business and consumers and for ensuring the appropriate level of consumption by individuals. To develop a mathematical model of the current assessment of the level of adaptation. Methodology. General and special methods of cognition are used: abstract-logical method – to establish the complex nature of impact of large-scale challenges on the level of adaptation; induction and deduction – to establish the additive and multiplicative nature of threats; comparative analysis – to establish the fact that the adaptation process has a differentiated and unstable character and to identify factors influencing the adaptability of business and consumers. The generalization method is applied to propose the formation of a state Strategy for promoting the adaptation of business and consumers and ways of implementing it. The method of induction and deduction is used to establish the fact that the unstable nature of the adaptation capabilities of consumers requires the implementation of institutional measures, to propose these measures. Based on mathematical methods, a model of step-by-step adaptation and assessment of the level of adaptation was developed. Findings. Factors affecting the level of business and consumer adaptation were studied. It is established that adaptation processes have differentiated, uneven and unstable character and reasons for this are indicated. It is indicated that the impact of set threats can be additive and multiplicative in nature. It is indicated that effective adaptation of enterprises is possible only with the integration of efforts by management of enterprises and by state institutions. It is proposed to introduce the State Strategy for Facilitating the Adaptation of Businesses and Consumers. Originality. A mathematical model of the current assessment of the level of adaptation is developed. Practical value. The developed mathematical model makes it possible to assess compliance with the direction of adaptation and conduct operational planning of the enterprise in a more relevant manner.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"180 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136102386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlling as an enterprise management tool in the digital economy","authors":"H Dashchenko, N Klymash, L Dukhnovska, O Vialets, G Blokhina","doi":"10.33271/nvngu/2023-5/134","DOIUrl":"https://doi.org/10.33271/nvngu/2023-5/134","url":null,"abstract":"Purpose. Expansion of the ability to implement an adaptation approach in enterprise management because of the implementation of the new controlling concept (NCC) in a digital economy. Development of the mathematical model of the adaptive approach. Methodology. The study uses general and special methods of cognition: abstract-logical analysis – to determine NCC, its preconditions, new opportunities; inductions and deductions – to establish the importance of adaptation as a NCC component, to harmonize strategic and operational plans; mathematical methods – for presenting an adaptation in structural and logical form; generalization method – for proposing ways of implementing the adaptation; logical abstraction – for development of the scheme of implementation of adaptation approach, and study on the possibility of diversification of the strategy, with the coordination of enterprise sub strategy. Findings. The definition of the new controlling concept is proposed, its preconditions are detailed. Ways of implementing an adaptation approach to managing the enterprise in conditions of dynamic changes are proposed. It is indicated that a new opportunity opened by NCC is the use of diversification of the company’s strategy and the implementation of adaptive coordination of sub strategies in real-time conditions. It is stated that the indicator of development of diversification can be used as an indicator of the adaptation capacity of the enterprise. The requirements for the introduction of NCC and the two main methods for implementing the adaptation approach are specified. Originality. A mathematical model of the adaptive approach for the implementation of NCC has been developed. A mathematized approach has been developed to coordinate sub strategies. A basic block diagram of the realization of the adaptation approach when introducing a new controlling concept has been developed. Practical value. The results of the study can be used by scientists to improve the methods and tools of NCC and by practitioners in the development and implementation of management information systems. The proposed approaches will increase controlling efficiency.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"38 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136103259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Critical infrastructure defense: perspectives from the EU and USA cyber experts","authors":"I Leroy, I Zolotaryova","doi":"10.33271/nvngu/2023-5/165","DOIUrl":"https://doi.org/10.33271/nvngu/2023-5/165","url":null,"abstract":"Purpose. To examine the components of cyber autonomy according to the insights of seasoned professionals from the European Union (EU) and the United States of America (USA). The value of each element will be calculated by obtaining data from structured in-depth interviews. Methodology. Through an investigation of different aspects of the research, we used the Delphi technique and research interviews include the option of the Interviewee Transcript Review (ITR). The Delphi method is processed in several rounds, usually three, with two rounds being considered as a minimum and in that respect the Delphi method helps our study explore, predict and identify the nature and fundamental elements of Cyber Autonomy. Findings. The study findings demonstrate that elements such as “Policies”, “Reputation management”, and “Infrastructure and Architecture” hold substantial importance within Cyber Autonomy. These elements are considered critical for future perspectives. The research highlights the role of Cyber Autonomy in streamlining cybersecurity approaches, mitigating the impact of cyber-attacks, and safeguarding possible reputation damage. The study also highlights the importance of well-defined implementation methods and the organizational structure in successfully deploying Cyber Autonomy. Originality. The research demonstrates the interdisciplinary nature of cybersecurity and applies a comprehensive approach covering information security, information security policy, technical and economic aspects, noting the important role of governance in the company share value recovery process. Cyber Autonomy could offer a concept of defense reputation that helps to identify potential cyber threats that are further intensified in connection with the development of various platforms for remote control of artificial intelligence, distance learning, and opportunities for autonomous operation of enterprise systems, the influence of multinational companies on financial markets, and automated decision-making systems. Practical value. Experts’ insights are analyzed that can help to provide practical solutions for the Cyber Autonomy and risk management methods for implementing cyber resilience strategy for critical infrastructure. The research provides adjustments to existing cybersecurity frameworks and directives which consider new cyber elements of information security realities. The current study can be used as a guide to confidence-building measures for possible reputation and financial loss, reinforces protection actions against disinformation or negative cyber impact.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"161 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136069909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the input material flow of the transport conveyor","authors":"O. M Pihnastyi, M. O Sobol","doi":"10.33271/nvngu/2023-5/156","DOIUrl":"https://doi.org/10.33271/nvngu/2023-5/156","url":null,"abstract":"Purpose. To develop a method for analyzing the material flow entering the input of a conveyor section, based on the decomposition of the input material flow into a deterministic material flow and a stochastic material flow. Methodology. The analysis of experimental data characterizing the input material flow was performed using the methods of the canonical Fourier representation of a random process. Findings. A method for representing a stochastic material flow as a combination of a deterministic process and a stationary random process with ergodic properties is proposed. Originality. The originality of the obtained results lies in the fact that, for the first time, a method of analysis based on the decomposition of the input material flow for a conveyor section has been proposed, which, unlike the existing methods of input flow typing for the mining industry, will allow us to independently perform deterministic flow typing and stochastic material flow typing in transport conveyors. The proposed approach makes it possible to highlight special characteristics separately for deterministic and stochastic material flows. This will make it possible to use the obtained regularities to increase the accuracy of the conveyor model and will accordingly increase the quality of the belt speed control systems and the flow of material coming from the input bunker. The obtained results are of particular importance due to the fact that the characteristics of the deterministic material flow are directly related to the technical or technological factors of material extraction. Practical value. The obtained results allow determining statistically stable regularities for the incoming flow, which makes it possible, based on these regularities from the set of available control algorithms, to choose the optimal control algorithm for the parameters of the operating conveyor section. This allows reducing the enterprise’s energy costs of the transportation of material. The proposed method can be successfully applied to build random number generators simulating the sequence of values of the input flow of material. The developed generators can be used both for validating existing belt speed control systems and creating new control systems based on neural networks. This opens perspectives for the design of effective systems for controlling the flow parameters of transport system, based on the transport conveyor model, which takes into account the stochastic nature of the incoming material flow.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"2 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reducing the formation of asphaltene deposits and increasing the flow rates of oil wells","authors":"D. Zh Abdeli, Wisup Bae, B. R Taubayev, A. S Yskak, A. K Yesimkhanova","doi":"10.33271/nvngu/2023-5/041","DOIUrl":"https://doi.org/10.33271/nvngu/2023-5/041","url":null,"abstract":"Purpose. Reducing the formation of asphaltene deposits in the bottom-hole zone of wells and increasing their flow rate. Methodology. The purpose of the work is achieved by conducting theoretical and experimental studies on the formation of asphaltene and paraffin deposits in the bottom-hole zone of the oil reservoir and identifying patterns of their dissolution by pumping heated low-boiling oil components containing carbon atoms C6–C9 in molecules into the well. Findings. The experimental studies conducted under laboratory conditions showed high solubility of asphalt-resin and paraffin compounds in low-boiling oil components. To prevent the deposition of asphaltene deposits in the bottom-hole zone of wells, the turbulent nature of oil movement is necessary, which is achieved by increasing reservoir pressure when water or gas is injected into the oil reservoir. It is also necessary to have a reservoir pressure above the saturation pressure of oil with gas. Effective methods are recommended to reduce the formation of asphaltene deposits in the oil reservoir in the bottom-hole zone and to restore the production rates of producing wells by pumping heated low-boiling oil components containing carbon atoms C6–C9 in molecules into the well. It has been experimentally established that when the temperature of the specified solvent changes from 20 to 800 °C, the time of complete dissolution of the asphalt-resin compound (bitumen) in the form of balls with a diameter of 5 mm is within 0.20–3.0 hours, and in reservoir conditions with a temperature of 60–80 °C – significantly less for 0.2–0.25 hours. This indicates that before pumping low-boiling oil components containing C6–C9 carbon atoms in the molecules, they must be preheated to reservoir temperature. A method is also proposed for treating the bottom-hole zone of an oil reservoir with a complex solution including low-boiling oil components containing carbon atoms C6–C9 in molecules, hydrochloric and fluoric acids. Originality. Effective methods are proposed to reduce the formation of asphaltene and paraffin deposits in the bottom-hole zone of the oil reservoir and to restore the production rates of producing wells by pumping heated low-boiling oil components into the well, as well as a complex solution with the inclusion of acids. Practical value. A technique has been developed to improve technological processes to reduce the formation of asphalt-resin-paraffin deposits and to establish rational parameters of the installation for producing low-boiling oil components containing carbon atoms C6–C9 in industrial conditions. Using the results of research in oil fields allows you to restore the initial permeability and thereby increase the flow rate of oil wells by 20–30 %.","PeriodicalId":19101,"journal":{"name":"Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}