https://nge.nung.edu.ua/index.php/nge/issue/feedOil and Gas Power Engineering2023-07-27T08:38:24+03:00Андрій Петрович Джус (Andrii Dzhus)ngejournal@nung.edu.uaOpen Journal Systems<p>The journal publishes materials based on the results of scientific and productive activity in the field of oil and gas complex in the following directions:</p> <p>Geology, exploration and geophysics of oil and gas fields</p> <p>Scientific and technical problems of petroleum engineering</p> <p>Materials, structures and equipment of petroleum complex facilities</p> <p>New solutions in modern equipment and technology</p>https://nge.nung.edu.ua/index.php/nge/article/view/606EXPERIMENTAL LABORATORY STUDIES OF THE PROCESS OF RECEIVING HYDROGEN FROM FORMATION FLUIDS2023-06-28T15:28:58+03:00I. I. Chudykchudoman@ukr.netO. R. Kondratchudoman@ukr.netA. O. Kotsiubynskyichudoman@ukr.netYe. V. Skirkoihor.chudyk@nung.edu.ua<p>The article focuses attention on the necessity and possibilities of implementing the decarbonisation process in the oil and gas production sector, which over the last 250 years of operation in Ukraine has become both a source of the main energy supply of the state and a problem of serious emissions of greenhouse gases and pollution. Attention is concentrated on the fact that due to the aging of the oil and gas infrastructure and the continuity of hydrocarbon regeneration processes in the subsoil, there are threats of polluting substances emission into the atmosphere, which requires the search for effective solutions that could prevent this problem and be effective in the field of energy generation. In accordance with the relevance of the problem, the purpose of the scientific publication and research tasks have been formulated, which consist in creating a laboratory facility for thermobaric investigation; physical modelling of the process with the reproduction of the appropriate thermobaric conditions and the use of reservoir fluids of various composition; selection of optimal process parameters when assessing possible risks at various stages of its implementation. To implement the research objectives, the authors outlined an algorithm for the laboratory practical implementation of the process of thermobaric transformation of water-oil fluids in the created research facility, which allows us to approximately model the conditions of in-situ combustion. To evaluate the studied gas mixture, a series of analyses of known gases and their relative mixtures was conducted. At the same time, gas containers with methane, oxygen, a mixture of argon and hydrogen, oxygen and nitrogen were used, as well as carbon monoxide and hydrogen synthesized chemically under laboratory conditions. At a fixed temperature and pressure, the progress of the chemical reaction was monitored for a certain time, after which the obtained gas mixture was analysed using several approaches (chromatographic, chemical, cryogenic). On the basis of in-situ combustion physical modelling process of water-oil mixtures selected compositions with different concentrations of water and oil (20-70% of its volume) under the influence of appropriate thermobaric conditions (pressure 2-4 MPa and temperature 360 and 500 оС) for 50-60 minutes of conducting each of the experiments, the direct signs of hydrogen presence were found, which confirms the assumption about the possibility of obtaining it. In order to determine the quantitative indicators of obtaining hydrogen from water-oil mixtures during in-situ combustion, it is necessary to improve the design of the experimental facility and conduct additional studies for establishing the optimal parameters of the process while assessing possible risks at various stages of its implementation.</p>2023-03-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineeringhttps://nge.nung.edu.ua/index.php/nge/article/view/611ANALYSIS OF METHODS FOR DETERMINING GAS LOSSES DURING BLOWDOWN OF GATHERING PIPELINES AND WELLS TO REMOVE LIQUID ACCUMULATIONS2023-06-12T09:40:06+03:00V. P. Holubenkoviacheslav.golubenko@ugv.com.uaS. M. Stetsiukstetsyuk.sergey@ugv.com.uaО. О. Philipchukviacheslav.golubenko@ugv.com.ua<p>The process of blowdown the internal cavity of gathering pipelines and wells of gas and gas condensate fields from accumulated liquid was considered as one of the methods of stabilizing their operation mode, which does not require additional capital investments. The "well - gas collection pipeline" system blowdown through the flare pipeline to the blowdown pit in order to remove the accumulated liquid, which creates excess pressure losses and negatively affects the production potential of the fields, is accompanied by irreversible gas losses, on the vol-umes of which, moreover, according to the legislation of Ukraine, rent payments are distributed. At the same time, the gas that is consumed during blowdown into the atmosphere belongs to the category of greenhouse gases and has a negative impact on the environment. To assess the reliability of the results obtained by the analytical meth-od, the research analyzed the methods of gas enterprises for determining gas losses during blowdowns gathering pipelines and wells of gas and gas condensate fields into the atmosphere. In the study have been determined and analyzed the major parameters of the main equations on which the calculation formulas of the considered methods are based. The results of calculations for the determination of gas losses during blowdowns according to existing methods were considered and compared with actual measurements by a gas meter. It was established that there are significant discrepancies in the results. Thus, the error for methods based on the parameter of the critical flow rate is from 250,6 % to 1065,2 %, for methods that depend on the working flow rate and the correction factor for the flow rate, it is from -48,5 % to 99,3 %. The reasons for the significant calculation error by the considered methods are determined. It was described and defined in the PipeSim software the operating parameters of the gathering pipelines and wells, which result in the formation of a gas flow with a significant liquid content during their blowdowns.</p>2023-03-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineeringhttps://nge.nung.edu.ua/index.php/nge/article/view/614ASSESSMENT OF ACCURACY OF DETERMINING GAS RESERVES IN PIPES UNDER CONDITIONS OF INCOMPLETE LOADING OF THE GAS TRANSPORTATION SYSTEM2023-07-27T08:38:24+03:00V. Ya. Grudzoleksandr.ivanov@nung.edu.uaYa. V. Grudzoleksandr.ivanov@nung.edu.uaV. B. Zapukhliakoleksandr.ivanov@nung.edu.uaO. V. Ivanovoleksandr.ivanov@nung.edu.uaO. A. Turovskyioleksandr.ivanov@nung.edu.uaB. M. Sukharskyioleksandr.ivanov@nung.edu.ua<p>The problem of determining the amount of gas in the sections of the linear part of the gas transportation system under the conditions of non-stationary mode of its operation is considered. In the conditions of war and post-war times, non-stationary processes in gas transport systems are characteristic of conditions of increased emer-gency and changes in the directions of gas flows and consumers. Therefore, the estimation of gas volumes in gas pipeline sections has to be carried out under conditions of non-stationarity, which leads to significant errors in the calculation results. In conditions of non-stationarity, fluctuations in gas pressure along the length and in time are observed, due to which the average pressure differs from the value found by stationary methods. The use of frequency methods, which is considered in the tasks of applying impedance methods in the calculation of non-stationary processes, to estimate the frequency range of gas pipeline operation, to obtain simplified methods of analysis of gas pipeline modes, numerical methods of applying operational equations, when analyzing the opera-tion of a gas pipeline by methods of statistical dynamics, equations of unsteady gas movement along a gas pipe-line. The frequency and amplitude of pressure fluctuations caused by disturbances in gas flow parameters are characteristics of a non-stationary process, therefore there should be a relationship between the amplitude-frequency characteristics and the non-stationarity criterion. The analysis of non-stationary processes in the gas pipeline caused by the change in gas flow was carried out on the basis of analytical modeling methods. As a model, the differential equations of gas motion and continuity, supplemented with stationary initial conditions and boundary conditions of the second kind, were used. Appropriate analytical solutions of pressure fluctuations and flow in the gas pipeline along the length and in time were obtained. The conducted analysis shows that the error in determining the volume of gas in the pipes under non-stationary conditions can be significant and must be taken into account. In this regard, a numerical amendment to non-stationarity of the regime when determining the amount of gas in the gas pipeline, which depends on the criterion of non-stationarity and which must be intro-duced into the calculation methodology.</p>2023-06-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineeringhttps://nge.nung.edu.ua/index.php/nge/article/view/613EXPERIMENTAL STUDY OF THE KINEMATIC CHARACTERISTICS OF A WALKING BEAM UNIT USING A SENSOR UNIT2023-07-10T09:25:01+03:00V. R. Kharunviktor.kharun@nung.edu.uaP. M. Raiternew_lazer@ukr.netR. V. Rachkevychnew_lazer@ukr.netI. I. Shostakivskyinew_lazer@ukr.net<p>At oil-production enterprises, much attention is paid to the diagnosis of the well rod pump installation's surface and underground equipment. Currently, methods of intelligent diagnostics are being developed, within including the usage of various sensors that are combined into sensor nodes for measuring a number of mechanisms and machines characteristics. The work presents the approbation of the universal wireless sensor node "Steval-MKSBOX1V1" by "STMicroelectronics"" (USA), which combines various sensors, a rechargeable battery and a wireless BLE interface that allows the remote parameters measuring. Two sensors a gyroscope and an accelero-meter have been chosen for the study. By means of them the kinematic characteristics of the executive mechanism of the swing machine have been measured: the angular velocity and acceleration of the crank, as well as the ac-celeration of the rod suspension. The research has been performed on a laboratory installation that allows simu-lating of an oil production well operation and consists of a SK3-1,2-630 rocking machine and an experimental well, equipped with a plug-in plunger pump, 55 mm in diameter which is located at a depth of 50 m. Since the sensor node measures angular velocity and acceleration in a three-dimensional coordinate system, the vector contour method has been used to create a mathematical model of the executive mechanism of the swing machine. Since the links of the executive mechanism move in one plane, the sensor signals are processed in two coordinates. A com-parison of theoretical calculations and experimental studies has been carried out, it showed that the usage of the assumption of a constant angular velocity of the crank introduces a small error of 3.6 % between the average val-ues of the angular velocity of the crank calculated theoretically and according to experimental data. However, the deviation in the calculation of the crank acceleration can reach 24.7 %, which is explained by the usage of the assumption that the angular acceleration is equal to 0.</p>2023-06-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineeringhttps://nge.nung.edu.ua/index.php/nge/article/view/610MODERNIZATION OF THE LABORATORY BENCH FOR RESEARCHING THE STRESS AND DEFORMATION STATE OF THE MODEL OF THE DRILL STRING SECTION2023-06-26T13:06:14+03:00R. V. Rachkevychruslan.rachkevych@nung.edu.uaI. I. Chudyki.chudyk@nung.edu.uaV. R. Kharunnew_lazer@ukr.netI. O. Rachkevychirachkevych@ifnmu.edu.ua<p>Evaluation of drill strings stress-strain state during their operation in the wells with random change of zenith and azimuth angles, non casing sections of well walls and dog-legs is very important scientific and practical prob-lem. One of the methods of its solution is the physical modeling of the "drill string – wellbore" system. On the basis of scientific works analysis in mentioned above field, aim of this article is formulated as modernization of the la-boratory test bench existing construction with the aim of explore stress-strain state of the drill string models in the wells with random curved axles with consideration of tension or compression forces and torque. In particular, support unit was rebuilt and made of steel profiles as rigid truss. Restriction of displacement of the one end of the drill string model was get as result. Also, loading unit is modified by the additional pulleys. As result we got possibility to load opposite end of the drill string model by the tension or compression axial force. Resistive foil strain gauge method is used for indirect measuring of the stresses in the drill string model cross section. Statistical anal-ysis of the results was operated by the Dixon’s criterion that is used for small experimental data samples. It gave possibility to separate incorrect values of the voltage on the resistive foil strain gauges and doesn’t use them for calculation of the stresses in the cross section of the drill pipe or its model. Was mentioned that further improving of the test bench construction will consist of adding of the electric motor for possibility of rotation of the drill string model and providing of the experiment in the dynamic mode.</p>2023-06-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineeringhttps://nge.nung.edu.ua/index.php/nge/article/view/608EXPERIMENTAL STUDIES OF COMBUSTION PROCESSES OF STEAM-DIESEL MIXTURE IN BOILERS OF MOBILE STEAM GENERATOR INSTALLATIONS 2023-06-12T09:43:16+03:00S. I. Kryshtopaauto.ifntung@ukr.netM. I. Bogatchuktrans@nung.edu.uaL. I. Kryshtopal.i.kryshtopa@gmail.comT. T. Gristortrans@nung.edu.uaM. Yu. Virttrans@nung.edu.ua<p>The article aims to reduce fuel consumption in boilers of mobile vapor generating units of the oil and gas industry due to using vapor-diesel mixtures as fuel which are a cheaper and more environmentally friendly alternative to diesel fuel. Theoretical studies of physicochemical processes during the combustion of vapor-diesel mixture in boilers of mobile vapor generators were carried out. Assumptions of the mathematical model of combustion of vapor-diesel mixture in boilers of mobile vapor generators were formulated. The mathematical model of vapor-diesel mixture combustion in boilers of mobile vapor generators was created. The calculations showed that the thermal effect of burning a vapor-diesel mixture exceeds the effect of burning the same amount of diesel fuel. The use of vapor-diesel mixtures allows for to reduction of the contamination of heating surfaces in boilers with soot. The combustion speed of the vapor-diesel mixture is greater than that of commercial diesel fuel, and the indicator pressure during the combustion of the vapor-diesel mixture increases. Calculations of diesel fuel consumption by PPUA vapor generator units at different modes were carried out. To confirm theoretical studies in industrial conditions, experimental studies of the main patterns of changes in the fuel-economical characteristics of mobile vapor generator units PPUA-1600/100 and PPUA-1200/100 were carried out. Fuel consumption was determined per hour of operation of vapor generating units at constant conditions of pressure P, temperature t and degree of dryness of saturated steam x. The conducted experimental studies showed that the transfer of boilers of mobile vapor generators to work using products of a vapor-diesel mixture was accompanied by a decrease in fuel consump- tion during the operation of boilers, and therefore is technically justified. The use of pre-diesel mixtures made it possible to increase the thermal efficiency of boilers of mobile vapor generators for various modes and reduce diesel fuel consumption by 8-14 %.</p>2023-06-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineeringhttps://nge.nung.edu.ua/index.php/nge/article/view/609ASSTSSMENT OF THE EFFICIENCY OF HYDRAULIC FRACTURING BASED ON THE WELL LOGGING RESULTS2023-06-12T09:46:03+03:00Ihor Fedakmeduzaf@ukr.netV. V. Fedorivvolodymyr.fedoriv@nung.edu.uaV. A. Uskovmeduzaf@ukr.net<p>The vast majority of oil fields in Ukraine are at the final stage of development. The inherent energy of such deposits has been exhausted, and in order to further extract oil, engineers are forced to take measures to maintain internal reservoir pressure. However, despite these efforts, there are a number of factors that impede the free flow of fluids into the well. In particular, during a long period of products withdrawal from the perforated interval, the filtration properties of the formation in the near-well zone deteriorate due to its gradual colmatization as a result of physical and chemical processes that occur during fluid filtration along the pore space. One of the most effective ways to stimulate oil flow into a well is to use hydraulic fracturing technology. Performing such an operation in a well is a complex task that requires taking into account a priori information about the filtration, capacitance and mechanical properties of the formation, the mineral composition of the rock matrix and the degree of its heterogeneity, oil characteristics, reservoir pressure, temperature, etc., and ensuring the control of the efficiency of the work performed. In this case, the main source of information is well logging and well testing. This paper evaluate and shows the possibilities of using the results of a set of geophysical and hydrodynamic methods as an integral part of hydraulic fracturing technology and demonstrates the effectiveness of this technology for increasing the flow rates of old wells.</p> <p> </p>2023-06-30T00:00:00+03:00Copyright (c) 2023 Oil and Gas Power Engineering