Oil and Gas Power Engineering https://nge.nung.edu.ua/index.php/nge <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> IFNTUOG en-US Oil and Gas Power Engineering 1993-9868 Technical and technological support for preventing the destruction of well walls https://nge.nung.edu.ua/index.php/nge/article/view/551 <p><em>At present stage of the development of the domestic gas production industry, the problem of increasing the volume of hydrocarbon production is extremely urgent for our state. In the dynamics, there is a significant increase in the volume of directional wells drilling. However, the drilling of such wells is associated with a number of problems. The main problems that may arise in this case are associated with insufficient stability of their bore, which in most cases leads to sticking of the drill string and a significant increase in material costs and production time for their elimination. Therefore, ensuring the integrity of the borehole walls during their drilling is a priority and extremely important problem in the system of measures aimed at improving the quality and improving the technical and economic indicators of their construction. The work is devoted to the improvement of the technology for preventing the destruction of the walls of directional wells, through the influence of technical, technological, mining, and geological factors on the change in the stress-strain state of the mass of the near-wellbore zone of the well. The production material on the sticking of the drill string was analyzed during the construction of wells in the Dnieper-Donets depression fields. It was found that the reasons for the loss of mobility of the drilling tool are mainly the violation of the integrity of the borehole walls as a result of caving and collapse of rocks, as well as the formation of keyseats on the borehole walls. Such complications arose, despite the observance of the operating and technological parameters, when deepening the well and recommendations for reducing keyseats on the walls of the well and preventing caving and collapse of rocks. The existing scientific and practical methods and approaches to prevent the loss of stability of the wellbore walls do not allow eliminating the indicated cause of complications, since the correct selection of the BHA, as well as the development of measures to reduce the intensity of capping and grooving, plays an important role. The paper proposes measures to prevent cavities and keyseats when drilling directional wells. The factors influencing the stability of the borehole walls in conditions prone to collapse and rock caving have been analyzed. The expediency of using baths for strengthening the walls of wells in clayey rocks has been established and substantiated. The formulation of a modified fuel-bitumen bath, the duration of which is 1.5÷5 times longer than that of a fuel-bitumen bath is proposed. A method is proposed for predicting intervals prone to complications associated with the loss of stability of the wellbore walls. According to industrial data, a technology has been proposed for installing a fuel-bitumen bath to prevent keyseats formation during well drilling. To eliminate the keyseats in the well, a bottom-hole assembly is proposed, which consists of stepped heavyweight drill pipes with simultaneous installation of tapered adapters at the transition points from a larger diameter of a drill string element to a smaller one and an eccentric carbide bit</em></p> А. І. Riznychuk О. S. Beizyk І. І. Vytvytskyi L. V. Pavlyshyn R. B. Stetsiuk Yu. D. Voloshyn Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 25 38 10.31471/1993-9868-2021-1(35)-25-38 Influence of roughness of pipes surface on flow capacity and energy efficiency of gas pipelines operation https://nge.nung.edu.ua/index.php/nge/article/view/562 <p><em> Long-term operation of main gas pipelines, the presence of water and mechanical impurities in the transported gas lead to erosion and corrosion damages to the inner surface of pipes, which causes an increase in its roughness. The increase in roughness results in an increase of the hydraulic resistance of natural gas pipelines, as well as affects theirs transport and energy consumption parameters. To manage the regimes of operation of main gas pipelines it is necessary to adequately predict their flow capacity and energy consumption for natural gas transportation under real values of pipe roughness which is higher than designed ones. On the basis of gas-dynamic equations of the steady-state gas movement the regularities of the influence of the pipe surface roughness on the hydraulic energy consumption of gas transportation at constant gas flow in the section of the gas pipeline are established. The regularities of the influence of the pipe surface roughness on the hydraulic efficiency coefficient of the gas pipeline section under idem difference of squares of inlet and outlet gas pressure values are clarified. It is established that the value of hydraulic efficiency coefficient of the gas pipeline section for specified value of absolute equivalent roughness of the pipe surface actually does not depend on the pipe inner diameter and slightly depends on the flowrate in the gas pipeline. The method of capacity and energy efficiency determination of the gas-dynamic system called compressor station – pipeline section for the increased pipe inner surface roughness in comparison with its designed value is proposed. The method involves mathematical modelling of gas-dynamic characteristics of centrifugal compressors, thermohydraulic calculation of the pipeline section taking into account the actual roughness of the pipe, consideration of pressure and gas flowrate technological limitations as well as energy consumption determination taken per unit of work lost in transport</em></p> М. D. Serediuk Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 39 47 10.31471/1993-9868-2021-1(35)-39-47 The research beam pumping unit of start-up mode https://nge.nung.edu.ua/index.php/nge/article/view/556 <p><em>In the article, research of the beam-pumping unit start-up mode has been performed in accordance with the existing configurations of the rod column, the diameter of the plunger and the dynamic fluid level in the well. A mathematical model of the pumping unit actuator has been developed, it takes into account the mechanical characteristics of the drive motor, the moments of inertia of the belt drive and gears of the gearbox and the mass of the actuator components. Calculations have been performed for the variant of the pump rod column layout - two-stage, for the diameters of the plunger 55mm and depths of pump suspension of 1456 m. The problem of the beam-pumping units’ startup is defined for two cases. The first case is applied when the mass of the counterweights installed on the cranks of the pumping unit exceeds the mass of the column of rods and liquid, which is located in the tubing column above the plunger of the pump (rebalance of the beam pumping unit). The second - when the mass of counterweights is insufficient to balance the column of rods and the liquid in the tubing column above the pump plunger (imbalance of the beam pumping unit). The cases of rebalancing and imbalancing of the pumping unit occur in wells that are under periodic operative conditions. The first case - rebalancing occurs when the oil rocking pumping unit does not work, and the liquid level behind the tubing gradually increases up to its static level. After switching on the drive motor, the torque created by the crank counterweights exceeds the moment caused by means of the weight of the rod column and the liquid in the tubing column. Therefore, it is recommended to start the pumping unit from the lowest position of the rod suspender. In the second case, the imbalance occurs when the liquid’s dynamic level behind the tubing is lowered before receiving the submersible pump. Then the torque, created by the crank counterweights is insufficient to compensate the moment, caused by means of weight of the rods’ column and the liquid in the tubing column. Therefore, it is recommended to start the beam pumping unit from the top position of the rod suspension. As a result of calculations, the conditions of overload occurrence in wells with periodic operative conditions of the pumping unit are determined</em></p> V. R. Kharun V. М. Senchishak V. Ya. Popovych І. І. Shostakivskyi Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 48 59 10.31471/1993-9868-2021-1(35)-48-59 Investigation of the influence of spraying angle on engine performance indicators in the process of biodiesel fuel use https://nge.nung.edu.ua/index.php/nge/article/view/553 <p><em>The use of alternative fuels in internal combustion engines poses a number of difficulties associated with the adaptation of the engine and its systems. However, the prospect of using alternative fuels has significant economic and environmental feasibility, and therefore is extremely important. Therefore, the issue of studying the main performance indicators of engines in the process of using biodiesel fuel RME B20 is relevant. From the analysis of literary sources, it was found that diesel engines are promising for the use of biodiesel fuel. The efficiency of these engines largely depends on the main parameters of mixture formation, which have not been sufficiently investigated for RME B20 fuel. In the process of using B20 biodiesel fuel on a Renault 2.5 DCI engine with a decrease in the fuel spray angle to 60<sup>o</sup>, it was established: a decrease in engine torque by 12.5%; drop in effective power to 15.7%; reduction of the effective pressure in the engine cylinders up to 24.8%; increase in specific effective fuel consumption up to 15%. This is due to the fact that with a decrease in the fuel atomization angle, the contact area of </em><em>the fuel drops and air in the engine cylinders decr</em><em>eases. And this, in turn, worsens the mixture formation process and leads to incomplete combustion of the fuel-air mixture. With an increase in the spray angle of the fuel to 750, the efficiency of using B20 biodiesel fuel on the Renault 2.5 DCI engine increases. Therefore, according to the results of studies of the operation of the Renault 2.5 DCI engine on commercial and biodiesel fuel RME B20, it was found that the use of biodiesel fuel leads to a deterioration in mixture formation due to which heat generation decreases, as a result, fuel consumption increases, and engine power, and torque decrease. To improve these indicators, it is necessary to change the mixture formation process by increasing the fuel atomization angle to 75<sup>0</sup>. </em></p> V. М. Melnyk Т. Y. Voitsekhivska М. М. Shtykh Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 10.31471/1993-9868-2021-1(35)-60-66 Study of the efficiency of nitrogen application for regulating the front of formation water movement in conditions of the manifestation of a water drive https://nge.nung.edu.ua/index.php/nge/article/view/552 <p><em>Using modern tools of hydrodynamic modeling, a study of the process of nitrogen injection into gas-condensate reservoirs near the initial gas-bearing contour was carried out in order to regulate the front of formation of water movement in conditions of the manifestation of a water drive. Calculations of the main technological indicators of the development of a productive reservoir were carried out for the duration of the nitrogen injection period at the level of 5, 6, 8, 10, 12, 14 months. The simulation results show that the injection of non-hydrocarbon gas ensures that the reservoir pressure in the reservoir is maintained at a higher level compared to depletion development. At the same time, it is possible to create additional hydrodynamic and filtration barriers at the initial gas-water contact, due to which there is an effective blocking of the flow of formation water into gas-saturated horizons. According to the results of the studies, it was found that in the case of the introduction of the nitrogen injection technology, significantly smaller volumes of produced water are produced in comparison with the development for depletion. The use of nitrogen as a pumping agent makes it possible to slow down the process of movement of the gas-water contact and prevent trapping of the residual reserves of natural gas. On the basis of the calculation results, the optimal value of the duration of the nitrogen injection period, beyond which the gas recovery coefficient changes insignificantly, was established. The optimum value for the duration of the injection period is 8.04 months. The predicted gas recovery factor for the optimum period of nitrogen injection is 58.11 %. When developing a gas condensate reservoir for depletion, the final gas recovery factor is 34.6 %. The results of the studies carried out indicate a high technological efficiency of nitrogen injection at the initial gas-water contact in order to regulate the process of formation water inflow into gas condensate reservoirs and increase the final gas recovery.</em></p> S. V. Matkivskyi Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-06-29 2021-06-29 1(35) 7 15 10.31471/1993-9868-2021-1(35)-7-15 Possibilities of attrtribute analysis of seismic data to clarify the structural features of geological section https://nge.nung.edu.ua/index.php/nge/article/view/555 <p><em>Seismic attributes are used for qualitative estimation of changes in the wave field performed within the analysis of seismic response characteristics. Related changes can be associated with sedimentation characteristics and structural features of the geological section. Subject of the study is Kovalivka field in the northern pre-flank zone of the western part of Dnieper-Donets basin. The aim of the study was to specify geological structure of the sub-salt Devonian sediments by means of attribute analysis of the wave field dynamic characteristics. It should be mentioned that Devonian sediments in Dnieper-Donets depression are very poorly studied by seismic and well drilling. New attempts to study Devonian formation here were caused by obtained inflows from similar Devonian reservoirs in Prypiat depression and by finding new prospects within the investigated area. The results of old seismic data re-processing have been analyzed as well as recent seismic and well data. Basing on the obtained data, the attribute analysis has been conducted and madden a prognosis of the geological section by wave field dynamic characteristics using Petrel software (Sсhlumberger). Due to performed interpretation procedures, we have specified location of faults, stratigraphic boundaries and distribution of sub-salt Devonian sediments. Also, we predicted a zone of development sub-salt carbonate sediments with possible a rifogenic origin. Significant increase of a total thickness of sub-salt formation and presence of quite thick relatively pure low-density organogenic carbonate sediments take place in Kovalivka field. It significantly increases the prospect potential of the area. </em></p> S. Ye. Rozlovska О. P. Vergunenko B. B. Hablovskyi М. V. Shtogryn Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-06-29 2021-06-29 1(35) 16 24 10.31471/1993-9868-2021-1(35)-16-24 Increasing the economic indicators of diesel engines by transferring them to gas-like products of conversion of methyl alcohol https://nge.nung.edu.ua/index.php/nge/article/view/550 <p><em>The</em><em> </em><em> </em><em>work</em><em> </em><em> </em><em>aimed</em><em> </em><em> </em><em>at</em><em> </em><em> </em><em>solving</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>problem</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>conversion</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>existing</em><em> </em><em> </em><em>diesel</em><em> </em><em> </em><em>power</em><em> </em><em> </em><em>drives</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>oil</em><em> </em><em> </em><em>and</em><em> </em><em> </em><em>gas</em><em> </em><em> </em><em>technological</em><em> </em><em> </em><em>transport</em><em> </em><em> </em><em>into</em><em> </em><em> </em><em>gaseous</em><em> </em><em> </em><em>fuels</em><em>, </em><em>which</em><em> </em><em> </em><em>are</em><em> </em><em> </em><em>a</em><em> </em><em> </em><em>cheaper</em><em> </em><em> </em><em>alternative</em><em> </em><em> </em><em>to</em><em> </em><em> </em><em>diesel</em><em> </em><em> </em><em>fuel</em><em>. </em><em>A</em><em> </em><em> </em><em>method</em><em> </em><em> </em><em>has</em><em> </em><em> </em><em>been</em><em> </em><em> </em><em>proposed</em><em> </em><em> </em><em>to</em><em> </em><em> </em><em>increase</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>energy</em><em> </em><em> </em><em>efficiency</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>alternative</em><em> </em><em> </em><em>fuels</em><em>. </em><em>The</em><em> </em><em> </em><em>thermochemical</em><em> </em><em> </em><em>essence</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>increasing</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>energy</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>source</em><em> </em><em> </em><em>fuel</em><em> </em><em> </em><em>has</em><em> </em><em> </em><em>been</em><em> </em><em> </em><em>developed</em><em>. </em><em>The</em><em> </em><em> </em><em>choice</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>alternative</em><em> </em><em> </em><em>alcohol</em><em> </em><em> </em><em>fuel</em><em> </em><em> </em><em>as</em><em> </em><em> </em><em>a</em><em> </em><em> </em><em>starting</em><em> </em><em> </em><em>product</em><em> </em><em> </em><em>for</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>conversion</em><em> </em><em> </em><em>process</em><em>, </em><em>taking</em><em> </em><em> </em><em>into</em><em> </em><em> </em><em>account</em><em> </em><em> </em><em>its</em><em> </em><em> </em><em>cost</em><em> </em><em> </em><em>and</em><em> </em><em> </em><em>energy</em><em> </em><em> </em><em>value</em><em>. </em><em>The</em><em> </em><em> </em><em>calculations</em><em> </em><em> </em><em>showed</em><em> </em><em> </em><em>that</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>thermal</em><em> </em><em> </em><em>effect</em><em> </em><em> </em><em>from</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>combustion</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>converted</em><em> </em><em> </em><em>CO</em><em> </em><em> </em><em>and</em><em> </em><em> H<sub>2</sub> </em><em>exceeds</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>effect</em><em> </em><em> </em><em>from</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>combustion</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>same</em><em> </em><em> </em><em>amount</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>liquid</em><em> </em><em> </em><em>methanol</em><em>. Compared to other alternative fuels, the cost of methyl alcohol is low, in addition, when using methanol as a fuel for diesel engines, you can significantly reduce emissions of soot particles and nitrogen oxides. This is due to the fact that the combustion of methanol in the diesel cylinder does not form intermediates that promote the formation of acetylene and aromatic hydrocarbons, which lead to the formation of soot. Methanol is a renewable natural resource, ie there is a large raw material base to increase its production and much wider use as an energy source. Using of this alcohol as an alternative biofuel for vehicles is possible as a result of its production in affordable and cheap ways from agricultural and food waste, from gaseous fuel. </em><em>Fuel</em><em> </em><em> </em><em>energy</em><em> </em><em> </em><em>and</em><em> </em><em> </em><em>engine</em><em> </em><em> </em><em>power</em><em> </em><em> </em><em>were</em><em> </em><em> </em><em>increased</em><em> </em><em> </em><em>by</em><em> </em><em> </em><em>regenerating</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>heat</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>exhaust</em><em> </em><em> </em><em>gases</em><em>. </em><em>Experimental</em><em> </em><em> </em><em>studies</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>power</em><em> </em><em> </em><em>and</em><em> </em><em> </em><em>economic</em><em> </em><em> </em><em>performance</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>a</em><em> </em><em> </em><em>diesel</em><em> </em><em> </em><em>engine</em><em>, </em><em>which</em><em> </em><em> </em><em>was</em><em> </em><em> </em><em>converted</em><em> </em><em> </em><em>to</em><em> </em><em> </em><em>work</em><em> </em><em> </em><em>on</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>products</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>methanol</em><em> </em><em> </em><em>conversion</em><em>. </em><em>Experimental</em><em> </em><em> </em><em>studies</em><em> </em><em> </em><em>have</em><em> </em><em> </em><em>shown</em><em> </em><em> </em><em>that</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>conversion</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>diesel</em><em> </em><em> </em><em>engines</em><em> </em><em> </em><em>to</em><em> </em><em> </em><em>work</em><em> </em><em> </em><em>using</em><em> </em><em> </em><em>methanol</em><em> </em><em> </em><em>conversion</em><em> </em><em> </em><em>products</em><em> </em><em> </em><em>is</em><em> </em><em> </em><em>justified</em><em>. </em><em>Given</em><em> </em><em> </em><em>that</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>price</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>methanol</em><em> </em><em> </em><em>is</em><em>, </em><em>on</em><em> </em><em> </em><em>average</em><em>, 10-20% </em><em>of</em><em> </em><em> </em><em>the</em><em> </em><em> </em><em>cost</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>diesel</em><em> </em><em> </em><em>fuel</em><em>, </em><em>the</em><em> </em><em> </em><em>conversion</em><em> </em><em> </em><em>of</em><em> </em><em> </em><em>diesel</em><em> </em><em> </em><em>engines</em><em> </em><em> </em><em>to</em><em> </em><em> </em><em>work</em><em> </em><em> </em><em>using</em><em> </em><em> </em><em>methanol</em><em> </em><em> </em><em>conversion</em><em> </em><em> </em><em>products</em><em> </em><em> </em><em>is</em><em> </em><em> </em><em>quite</em><em> </em><em> </em><em>profitable</em><em>.</em></p> М. М. Hnyp S. І. Kryshtopa L. І. Kryshtopa І. М. Mykytii F. V. Kozak Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 67 80 10.31471/1993-9868-2021-1(35)-67-80 Study of surface and rheological properties of clayless biopolymer drilling mud treated with M-1 surfactants https://nge.nung.edu.ua/index.php/nge/article/view/564 <p><em>An important issue of improving the quality of the initial opening of the reservoir through the use of a system of drilling fluids treated with surfactant M-1. For high-quality disclosure, it is proposed to use clay-free biopolymer drilling mud. The main analyzed features of M-1 use as an additive to biopolymer drilling mud used in Ukrainian deposits. The formulation is substantiated and the study of clay-free biopolymer solution for primary opening of productive layers is carried out. Processed non-ionic surface active agent (surfactant) M-1 model biopolymer clayless drilling mud. With the use of oil (density 838 kg /m<sup>3</sup>) Kachanivsky oilfield conducted measuring the interfacial tension coefficient at the interface "mud filtrate – oil" stalagmometric metod by changes in the concentration range (% by weight) M-1 from 0 to 5. The influence of M-1 concentration on the interfacial tension coefficient at the interface of "oil – biopolymer drilling fluid filtrate" is shown and the critical concentration of micelle formation (CCM) of surfactant in the filtrate is found, the excess of which does not reduce the interfacial tension. It has been experimentally established that with increasing concentrations of M-1, the interfacial tension factor at the interface between the phases of "oil – filtrate of the drilling fluid" is sharply reduced, which leads to an increase in the formation fluid formation fluid. The rheological properties of drilling fluids with rotational viscometry are determined. Polynomial dependences of temperature influence on rheological properties without clay biopolymer drilling mud have been established.</em></p> Yu. D. Voloshyn М. S. Polutrenko V. V. Bogoslavets Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 91 97 10.31471/1993-9868-2021-1(35)-91-97 Environmental performance of the Volkswagen 1,4 engine in the process of its operation on biogas https://nge.nung.edu.ua/index.php/nge/article/view/554 <p><em>In recent years, Ukraine and the world have seen a steady increase in the use of compressed natural gas (LNG) in cars. The main reason for such attention to gaseous motor fuel is its low cost compared to gasoline and diesel fuel. This is also facilitated by the extensive network of autogas filling compressor stations (CNG stations) ofUkrtransgaz, which today is about 150 stations and is constantly growing. Today, the network of CNG stations in the country is used by 35,000 cars, which allows Ukraine to rank seventh in the world in terms of the number of cars running on LNG. The use of methane-based natural gas as an alternative fuel in Ukraine has long begun. Road transport is actively switching to this gas. Currently, the country is conducting a powerful advertising campaign to convert cars from conventional fuel to natural gas. The economic benefits of such a transition are obvious. Natural gas turned out to be almost twice cheaper than propane, which is much cheaper than gasoline.</em> <em>Unlike gasoline and diesel fuel, natural gas does not contain toxic impurities and additives, has a wide range of ignition. Exhaust gases from natural gas engines contain a small amount of normalized harmful emissions. LNG, including biogas, burns more slowly than gasoline, reducing the load on the cylinder-piston group, the engine runs "softer" and quieter. In total, these factors provide double (and more) savings in operating costs, extend the life of the engine by 30-40%, oil and spark plugs - twice, and as a result significantly reduce repair costs. Optimization of the working process of the engine running on gas (increasing the degree of compression of the engine to 10-11; installation of a modern ignition system with modified, optimized for gas fuel characteristics at maximum and variable engine speeds) allows to ensure maximum engine power while maintaining efficiency and environmental parameters. high modern level.</em></p> Т. Y. Voitsekhivska V. М. Melnyk А. R. Sumer М. М. Shtykh Copyright (c) 2021 Oil and Gas Power Engineering https://creativecommons.org/licenses/by-sa/4.0 2021-08-10 2021-08-10 1(35) 81 90 10.31471/1993-9868-2021-1(35)-81-90