Wyniki wyszukiwania - BazTech

1

Development of software for creating and visualising technological schemes of gas flow in underground gas storage facilities for forecasting their operation modes

Volovetskyi V. B., Bugai A. O., Altukhov S. O., Levin O. A., Romanyshyn Y. L., Sheketa V. I., Kasyanchuk I. P.

Journal of Achievements in Materials and Manufacturing Engineering

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2025

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Vol. 129, nr 1

27--41

EN

Purpose: The objective of the study is to develop software for analysing the performance characteristics of individual technological facilities of underground gas storage (UGS) facilities. The software will determine the forecasted performance indicators and operating modes of gas storage facilities. Design/methodology/approach: The paper provides an in-depth analysis of the technological processes involved in withdrawing and injecting gas from/into underground gas storage facilities. Following an analysis of the initial data from the technological equipment, a database structure was developed and created. The software provides an object-by-object analysis of performance characteristics for individual technological units of gas storage facilities, enabling users to determine their predicted performance indicators, technological limitations, and optimal operating modes. Modules were developed to collect, process, and view data, as well as perform the necessary calculations. Findings: Based on the results of the work carried out, specialists will be able quickly to solve problems related to determining the forecast indicators of operation of UGS facilities and conduct an object-by-object analysis of their operation mode to identify the least efficient sections of the technological scheme in terms of hydraulic efficiency and productivity in different operating modes. Research limitations/implications: To enhance the efficiency of UGS operations, it is recommended that the necessary software be implemented to calculate the predictive modes of operation of UGS technological units and to create a catalogue of their performance characteristics. Practical implications: The results of the work carried out allow specialists to create design schemes for UGS facilities that provide the ability to conduct a detailed, facility-by-facility analysis of the performance characteristics of individual process units. The analysis allows users to determine the forecast performance of both individual process facilities and UGS facilities as a whole. Originality/value : It is proposed that software be developed to determine UGS modes, considering the performance of the relevant technological equipment. Applying the approach ensures the efficiency of analysing UGS modes and selecting the optimal one.

2

Developing a gas-dynamic model of an underground gas storage facility

Volovetskyi V. B., Bugai A. O., Levin O. A., Serediuk M. D., Romanyshyn Y. L., Shchyrba O. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2025

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Vol. 128, nr 1

18--32

EN

Purpose: The aim of the study is to create a gas-dynamic model of the Dashava underground gas storage (UGS) facility. It studies reservoir properties and well operation parameters during underground gas storage facility (UGSF) operation in the seasons of withdrawal and production. Design/methodology/approach: The research methodology comprehensively examines the findings from geophysical, seismic, and gas-dynamic investigations. It also encompasses data on well design, operational indicators, and the primary parameters associated with the underground storage facility’s operational performance during its operational lifespan. Additionally, geological and gas-dynamic models are created. The geological model will be refined by adapting its filtration and capacitance characteristics to align with the actual gas-dynamic parameters of cyclic operation. Additionally, a gas-dynamic model will be developed and adapted to align with the calculated reservoir pressures in the wells and the actual reservoir pressure in the actively drained zone. Findings: The reservoir and operational parameters of the gas storage wells were analysed, and gas-dynamic calculations were performed using the Petrel software package. The Petrel software package was used to build a 3D geological model of the Dashava structure for the gas-bearing horizons ND-8 (XIV) and ND-9 (XV), and the physical properties of gas reservoir rocks were substantiated. A gas-dynamic model was developed and adapted by comparing the main indicators of the gas storage facility between the calculated and actual values of the Dashava UGSF. Based on the results obtained, it was found out that the discrepancy between the average calculated and actual pressure values is minimal. The developed gas-dynamic model provides forecasting of the main indicators of the gas storage facility with a reliability of more than 90%, which indicates the feasibility of using the model for approximate calculations of the predictive mode of operation of the Dashava UGSF. Practical implications: The studies performed by means of gas-dynamic modelling of UGS facilities allow for a more thorough approach to the study of the reservoir system of gas storage facilities and promptly perform forecasting of the main indicators of its operation during gas withdrawal and production. Originality/value: The application of the developed gas-dynamic model of the UGS facility will provide an opportunity to quickly analyse the main indicators of its work to solve problematic issues in a timely manner.

3

Information and software for forecasting and planning technological modes of gas injection and withdrawal at underground gas storage facilities

Volovetskyi V.B., Shchyrba O.M., Romanyshyn Y.L., Sheketa V.I., Pikh V.Y., Vovk R.B., Yatsyshyn M.M.

Archives of Materials Science and Engineering

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2025

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Vol. 132, nr 1

5--20

EN

Purpose: The purpose of the work is to develop software to solve problems of forecasting and planning the operation of underground gas storage (UGS) facilities and the use of their capacities depending on the level of consumption, demand for natural gas storage services, and maximum daily productivity. Design/methodology/approach: Based on the analysis of various output data from technological units, as well as the study of wells digitised and entered into the database, software for predicting UGS operation modes has been developed. The developed software enables users to conveniently customise the user interface, allowing them to quickly locate the necessary information in the database and perform predictive calculations for various technological units, ensuring the efficient and uninterrupted operation of the UGS facility. Findings: The software is designed for easy use by specialists, enabling the prediction of gas extraction and injection modes in the shortest possible time and monitoring the primary indicators of stable UGS facility operation. The developed software significantly simplifies the work with large data sets, as well as the calculation of parameters of process equipment and UGS facilities. Research limitations/implications: To increase the efficiency of UGS operation, it is advisable to implement the developed software necessary to calculate the predicted operating modes of technological units, wells, and UGS in general, in order to select a rational mode of gas storage operation. In addition, it is necessary to plan a strategy for the development of underground gas storage facilities (reconstruction and modernisation), and determine the need for additional investments aimed at increasing the UGS facilities (active volume and/or capacity). Practical implications: The work results enable specialists to create design schemes for UGS facilities that allow for a detailed, facility-by-facility analysis of the performance characteristics of individual process units. It also allows the forecast performance of both individual process facilities and UGS facilities as a whole to be determined. Originality/value: The software enables specialists to make accurate predictions regarding gas storage capacity under specific conditions, ascertain the maximum feasible gas withdrawal volumes, and determine the requisite time for withdrawing a given volume of gas.

4

Development of the electronic catalogue on performance characteristics of technological equipment of underground gas storage facilities

Volovetskyi V.B., Bugai A.O., Levin O.A., Romanyshyn Y.L., Shchyrba O.M., Sheketa V.I., Kasyanchuk I.P.

Archives of Materials Science and Engineering

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2025

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Vol. 131, nr 1

14--26

EN

Purpose: The aim of the work is to develop software for digitising nomograms of production parameters of wells, technological equipment of underground gas storage (UGS) facilities, and the creation of electronic catalogues for storage and operational use in solving various problems. Design/methodology/approach: The paper analyses the existing downhole and separation equipment installed at UGS facilities. An electronic catalogue of equipment performance characteristics was created. The information on the characteristics of the X-mas tree of the well, column heads, tubing, flowlines, vertical and horizontal separators, dust collectors and absorbers was systematised. Industrial studies were conducted to measure the volume of transported gas and liquid contaminants coming with the gas flow from wells. The software has been developed to digitise nomograms of productive parameters of wells and UGS facilities and create an electronic catalogue of their productive characteristics. The developed electronic catalogue has a user-friendly interface that allows the user to decide on the optimal UGS operation mode quickly. Findings: Based on the results of the work carried out, the user gets an opportunity to digitise and create electronic catalogues of performance characteristics of all technological equipment of the gas storage facility, which will allow the use of performance indicators when determining the technological modes of the UGS facility. Research limitations/implications: In order to improve the efficiency of UGS operation, it is advisable to introduce modern approaches to timely analysis and forecasting of UGS process equipment operation using information technologies, in particular, the development and implementation of electronic catalogues of digitized information. Practical implications: Thanks to the developed software, it is possible to quickly find the necessary information in the electronic catalogue, as opposed to a traditional paper archive, which will allow faster and more accurate forecasting of UGS operation modes and operational work. Originality/value: It is proposed that software be developed to form an electronic catalogue of performance characteristics of downhole and separation equipment. The use of this approach generally ensures the efficiency of analysis of UGS regimes and timely action.

5

Study of gas gathering pipelines hydraulic efficiency in gathering facilities of depleted fields

Volovetskyi V. B., Romanyshyn Y. L., Raiter P. M., Serediuk M. D., Shchyrba O. M., Matkivskyi S. V., Filipchuk O. O.

Journal of Achievements in Materials and Manufacturing Engineering

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2024

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Vol. 122, nr 2

69--85

EN

Purpose: The study aims to investigate the hydraulic efficiency of gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF). Identify the main factors that lead to a decrease in the hydraulic efficiency of gas gathering pipelines. Design/methodology/approach: The modes of operation of gas gathering pipelines were studied experimentally at gas treatment units. Calculations determined the volume of liquid contaminants in the internal cavity of gas gathering pipelines. Industrial studies were conducted to measure the volume of transported gas and liquid contaminants entering the flow. A comparison of the obtained values makes it possible to assess objectively the presence of liquid contaminants in the internal cavity of gas gathering pipelines. Findings: Based on the results of studies of the gas gathering pipelines' hydraulic efficiency, it was found that the volume of liquid contamination determined by calculations is less than that determined by the results of industrial studies. The main factors that adversely affect the hydraulic efficiency of gas gathering pipelines have been identified. Timely monitoring of these main factors will help prevent a decrease in the hydraulic efficiency of gathering pipelines and a decrease in the volume of transported gas. Implementing a system for monitoring the efficiency of gas gathering pipelines will allow timely measures to be taken and prevent a decrease in gas transportation. Research limitations/implications: To improve the efficiency of gas gathering pipeline operation, it is advisable to introduce new approaches to timely prediction of complications, particularly developing and implementing various control systems. Practical implications: The performed studies make it possible to objectively assess the reasons for the decrease in the hydraulic efficiency coefficient of gas gathering pipelines, which will make it possible to predict it to prevent a decrease in the volume of transported gas. Originality/value: It is proposed to use a system for monitoring the efficiency of gas gathering pipelines. Applying this approach generally ensures the efficiency of analysing the state of gas gathering pipelines and timely action.

6

Development of software for automated digitisation of geophysical survey results of underground gas storage wells

Volovetskyi V. B., Romanyshyn Y. L., Bugai A. O., Doroshenko Ya. V., Shchyrba O. M., Vasko A. I.

Journal of Achievements in Materials and Manufacturing Engineering

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2024

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Vol. 125, nr 1

25--41

EN

Purpose: The purpose of the work is to store, process and analyse the materials of geophysical surveys of wells (GSW) of underground gas storage (UGS) facilities. In order to reduce the time needed to analyse paper-based GSW data accumulated during the operation of gas storage facilities, it is important to transfer them to electronic form for storage. A set of application software solutions has been developed to achieve the goal. Design/methodology/approach: The paper presents approaches to the operational analysis of geophysical information, including its verification, correction and accumulation in digital format. A software package (SP), „Karotazh”, was developed for automated recognition of the results of geophysical surveys of wells, which are important for solving various geological and technological problems by means of prompt processing, systematisation, accumulation of initial information, graphical and documented display of this information. The software for preparation of well logs is designed to enter them into the archive for storage, viewing and further automated recognition (digitisation). In order to solve the tasks set out in the study, it has been used such general scientific methods as systematisation (when selecting the necessary sources of information), generalisation (in the process of defining general terms that highlight the main features), formal logical method, method of systematic analysis of information, descriptive method and modelling method. Findings: Implementing the developed software for automated recognition of logging results can increase the efficiency of processing geological and geophysical information on wells and productive horizons to analyse their condition and eliminate complications promptly. For users' convenience, an interface for Ukrainian UGS conditions has been developed, allowing specialists to increase their work’s efficiency. The proposed software solution can be used by oil and gas companies in Ukraine to digitise and provide information support for the analytical processing of geophysical survey results. The approach enables to quickly digitise and analyse well logs and then store them in an electronic archive of geophysical surveys. Research limitations/implications: In order to solve problematic issues in gas storage wells on time, it is necessary to promptly analyse the results of geophysical surveys using modern software tools to predict possible complications and take appropriate measures in a timely manner. Practical implications: Implementation and use of the developed software solution for automated recognition of GSW results at UGS facilities enables to reduce the time for analysis of information in paper form and increase the efficiency of obtaining the necessary information for timely action in case of complications. Originality/value: The authors propose relevant and up-to-date software solutions for the automated processing of GSW results and their storage and use in an electronic archive. Implementing the approach in production enables specialists to quickly analyse information and solve problematic issues.

7

Development of information and software for automation and digitalisation of processing and analysing geological-geophysical data of underground gas storage wells

Volovetskyi V. B., Romanyshyn Y. L., Bugai A. O., Altukhov S. O., Shchyrba O. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2024

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Vol. 126, nr 2

66--85

EN

Purpose: The work aims to develop an information and software system for the operational analysis of geophysical well logging (GWL) data from underground gas storage (UGS) facilities for any period of their operation. In order to increase the efficiency of the detailed analysis of the well logging data accumulated over the entire period of operation of gas storage facilities, it is advisable to store them in electronic form. Design/methodology/approach: Information and software systems have been developed to allow geological and geophysical information accumulation, verification, correction and analysis. Data from the developed databases are used to automate the process of creating graphical geological materials for each well and for UGS facilities. The purpose of the systems is to provide automated solutions to various geological and technological tasks using personal computers by means of timely processing, systematisation, accumulation of initial information, and graphical and documented display of the information. Information and software systems have been developed to display the results of lithological analysis of UGS borehole sections and to correlate UGS borehole sections. Findings: The application of the developed software in production can increase the efficiency of analysis of geological and geophysical information on wells and production horizons, identify possible complications and take timely measures. Research limitations/implications: To solve possible complications in gas storage wells in time, it is necessary to analyse the results of geophysical surveys to predict them. Practical implications: Implementation of the developed information and software system will increase the efficiency of the analysis of geophysical information in order to provide timely solutions to various problems. Originality/value: The application of the developed information and software system will allow the timely analysis of geological and geophysical information to solve problematic issues.

8

Developing an electronic archive of geophysical survey results from underground gas storage wells

Volovetskyi V. B., Romanyshyn Y. L., Altukhov S. O., Bugai A. O., Doroshenko Ya. V., Shchyrba O. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2024

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Vol. 122, nr 1

14--30

EN

Purpose: The study aims to analyse and systematise the data from geophysical surveys of wells (GSW) of underground gas storage (UGS) facilities. In order to minimise the time required for a detailed analysis of the paper-based GSW data for the entire period of gas storage facility operation, it is advisable to transfer it to electronic form as much as possible. Design/methodology/approach: The software "Electronic archive of GSW" was developed. The software makes it possible to store the results of the GSW in various formats in the developed centralised database, sort them by various parameters, and provide prompt access to it with appropriate access rights for different configurations for individual users. Based on the developed database structure, modules were developed that ensure the export and synchronisation of cartographic materials with the data of the electronic archive of the results of geophysical surveys of UGS wells, namely: "Directory of well types", "Directory of horizons", "Status of well stock", "Export of surveys". The developed modules have a user-friendly interface and provide the user with the possibility of comprehensive use of geophysical survey data for viewing and exporting them directly to the user's terminal using mapping materials. Findings: With the help of the software "Electronic Archive of GSW", it is possible to increase the efficiency of processing geological and geophysical information on wells and productive horizons to analyse their condition and timely resolve problematic issues. To view the location of wells and improve the convenience of working with the electronic archive data, an interface has been developed that allows the user to process the electronic archive data using structural maps of UGS productive horizons. Research limitations/implications: To improve the efficiency of solving various problems at gas storage facilities, it is advisable to introduce new approaches to timely forecasting of complications, including prompt analysis of information from geophysical surveys of wells and the implementation of various measures. Practical implications: The implementation of the developed software "Electronic Archive of GSW" at underground gas storage facilities will significantly reduce the time for analysing information in paper form, facilitate the work of specialists and increase their efficiency in obtaining the necessary information in a timely manner. Originality/value: The use of an electronic archive (EA) of the results of geophysical surveys of underground gas storage facility wells is proposed. The application of this approach and the functioning of the software as a whole ensures the efficiency of information analysis and the decision-making process.

9

Numerical and laboratory experimental analysis of the movement of silicone cleaning pigs through 90-degree bends pipe

Stetsiuk S.M., Doroshenko Ya.V., Filipchuk O.O., Daniv Z.V., Volovetskyi V.B.

Archives of Materials Science and Engineering

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2024

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Vol. 126, nr 2

65--77

EN

Purpose: Analysis of the stress-strain state of cylindrical cleaning pigs manufactured of hyperelastic material during their movement through the pipe bends of the pipelines, identification of maximum contact forces' points, and places of their separation from the inner wall. The effect of the dynamic friction coefficient between the pig's lateral surface and the pipeline's inner wall on the value of the maximum equivalent von Mises stresses in the pig is investigated – determination of the required pressure for the passage of the pig through pipeline bends. Design/methodology/approach: The finite element method performs numerical modelling of the pigs' movement through pipeline bends is performed. The non-linear properties of a hyperelastic pig material (a silicone compound with a hardness of 30 units on the Shore scale) are described by the potential Yeoh strain energy model. The contact interaction of the pig with the inner wall of the pipe bend is modelled by a surface-to-surface contact with dynamic friction coefficients of 0.1, 0.2, and 0.3 between them. For research, pigs with a length of 60 mm, 75 mm and 90 mm with a convex front and a concave rear end were manufactured and modelled. The experimental unit was designed and mounted from metal and glass pipes, between which pipe bends were placed with a bending angle of 90° and a bending radius of 1.5 DN. The metal pipeline has an internal diameter of 49 mm and a total length of 5.3 m, and the glass pipeline is 54 mm and 5 m, respectively. The experimental installation made of glass pipes was designed for visual observation of the dynamics of the pig movement through the glass pipeline bend and from metal – for measuring the pressure during the pig movement along the straight sections and the pipeline bend. To verify the correctness of the numerical modelling, the fully calculated deformations of the cleaning pigs in the bends of the pipeline were visualized and compared with photographs of the deformations of the pigs during their movement through the glass bends of the pipelines. Findings: The bending of the pig in the pipe bend and contact forces increase equivalent von Mises stresses in the pig. Moreover, during the movement of the pig in a pipe bend, the distribution of equivalent von Mises stresses in it, as well as its deformations, changes continuously. It depends on the stage at which it is located. Numerical modelling and experiments have established that when the pig is at the stage of movement in the middle part of the pipe bend, due to bending, its lateral surface is partially separated from the inner wall of the pipe bend. With this, on the convex side of the pipe bend, the pig is separated from the wall in the front and rear parts and on the concave side – in the middle part. This separation of the lateral surface of the pig from the inner wall of the pipe bend results in the formation of a gap and cross-flows through the pig, reducing the pressure drop on it, which can lead to its sticking. For pigs made of silicone compound with a hardness of 30 units on the Shore scale to pass pipeline bends with a bending angle of 90° and a bending radius of 1.5 DN, the pressure in the pig space shall be at least twice as high as the pressure required for the pig to move along a straight section of the pipeline. Research limitations/implications: Modelling and experimental studies were performed for pigs made of silicone compound. Therefore, subsequent studies will establish the influence of other hyperelastic materials' physical and mechanical properties on the pig movement along the pipeline bends. Practical implications: The results obtained in this study allow for determining the possibility of pigs passing through the pipeline bends of gas gathering systems at gas fields and gas networks, determining the necessary pressure for this and, if necessary, optimising the geometric shape and dimensions of the pigs passing through the pipe bends. Originality/value: The influence of the location of a solid pig made of hyperelastic material in the pipeline bend and the coefficient of dynamic friction on the stress-strain state of the pig is studied. The article contains original experimental units designed and installed to study the movement of pigs through pipeline bends.

10

Development of methods for predicting hydrate formation in gas storage facilities and measures for their prevention and elimination

Volovetskyi V. B., Doroshenko Ya. V., Matkivskyi S. V., Raiter P. M., Shchyrba O. M., Stetsiuk S. M., Protsiuk H. Ya.

Journal of Achievements in Materials and Manufacturing Engineering

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2023

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Vol. 117, nr 1

25--41

EN

Purpose: The purpose of this work is to study the processes of hydrate formation during the operation of wells and underground gas storage facilities. Development of a set of measures aimed at the prediction and timely prevention of hydrate formation in wells and technological equipment of gas storage facilities under different geological and technological conditions. Design/methodology/approach: The prediction of hydrate formation processes was carried out using a neural network that is a software product with weight factors calculated in MATLAB environment and the ability to adapt parameters of the network specified to updated and supplemented input data during its operation. So, within the MATLAB software environment, a software module of a two-layer artificial neural network with a random set of weight factors is created at the first stage. In the second stage, the neural network is trained using experimental field input/output data set, output data. In the third stage, an artificial neural network is used as a means of predicting hydrate formation with the ability to refine weight factors during its operation subject to obtaining additional updated data, as an input set, for modifying the coefficients and, accordingly, improving the algorithm for predicting of an artificial neural network. In the absence of new data for the additional training of an artificial neural network, it is used as a computing tool that, on the basis of input data about the current above-mentioned selected technological parameters of fluid in the pipeline, ensures the output values in the range from 0 to 1 (or from 0 to 100%), that indicates the probability of hydrates formation in the controlled section of the pipeline. Application of such an approach makes it possible to teach; additionally that is, to improve the neural network; therefore this means of predicting hydrate formations objectively increases reliability of results obtained in the process of predicting and functioning of the system. The authors of the work recommend to carry out an integrated approach to ensure clear control over the operation mode of wells and gas collection points. Findings: According to the results of experimental studies, the places of the most likely deposition of hydrates in underground gas storage facilities were identified, in particular, in the inside space of the flowline in places of accumulation of liquid contaminants (lowered pipeline sections) and an adjustable choke of the gas collection point. The available methods used to prevent and eliminate hydrate formation both in wells and at gas field equipment were analyzed. Such an analysis made it possible to put together a list of methods that are most appropriate for the conditions of gas storage facilities in Ukraine. The method of predicting hydrate formation in certain sections of pipelines based on algorithms of artificial neural networks is proposed. The developed methodology based on data on values of temperatures and pressures in certain sections of pipelines allows us to predict the beginning of the hydrate formation process at certain points with high accuracy and take appropriate measures. Research limitations/implications: To increase the efficiency of solving the problem of hydrate formation in gas storage facilities, it is expedient to introduce new approaches to timely predict complications, in particular, the use of neural networks and diverse measures. Practical implications: Implementation of the developed predicting methodology and methods and measures to prevent and eliminate hydrate formation in wells and technological equipment in underground gas storage facilities will increase the operation efficiency of underground gas storage facilities. Originality/value: The use of artificial intelligence to predict hydrate formations in flowlines of wells and technological equipment of underground gas storage facilities is proposed. Using this approach to predict and function the system as a whole ensures high reliability of the results obtained due to adaptation of the system to the specified control conditions.

11

Development of foam-breaking measures after removing liquid contamination from wells and flowlines by using surface-active substances

Volovetskyi V. B., Doroshenko Ya. V., Stetsiuk S. M., Matkivskyi S. V., Shchyrba O. M., Femiak Y. M., Kogut G. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2022

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Vol. 114, nr 2

67--80

EN

Purpose: The purpose is to consider the complications that arise during the operation of gas condensate wells, in particular, the accumulation of liquid contamination. Development of new approaches to improve the efficiency of the separation equipment performance of gas gathering and treatment systems when a multiphase flow enters. Development of a foam breaking method in a gas-liquid flow after removal of liquid contaminants from wells and flowlines using surfactants. Design/methodology/approach: An analysis was made of the complications that may arise when removing liquid contaminants from wells and flowlines using surfactants. Measures have been developed that will make it possible to timely prevent the ingress of foam into the separation equipment of gas gathering and treatment systems. Using computational fluid dynamics (CFD) modelling, an effective foam-breaking device was developed by supplying stable hydrocarbon condensate. Findings: A method to minimize the negative impact of foam on the operation of separation equipment after fluid removal from wells and gas condensate field flowlines using a surfactant solution was elaborated. A method for its breaking was proposed to prevent the flow of foam into the gas processing unit. This method foresees the application of the technological scheme layout for supplying a stable hydrocarbon condensate to a gas-liquid flow entering the separators of the first of separation, both the main line and the measuring line. CFD modelling was used to study the process of foam breaking by feeding hydrocarbon condensate into it. The influence of the hydrocarbon condensate supplying method on gas-dynamic processes (distribution of pressure, velocity, volumetric particles of phases), and the efficiency of foam breaking was estimated. It was established that the supply of hydrocarbon condensate from one branch pipe to the pipeline through which the foam moved did not ensure its complete breaking. To increase the efficiency of foam breaking, a device with designed four nozzles for supplying hydrocarbon condensate was developed. CFD modelling made it possible to substantiate that in this case, a pressure reduction zone appeared at the place of condensate supply. Because of a sharp change in pressure, a strong improvement in the effect of foam breaking occurred. The understanding of the regularities of foam breaking processes by hydrocarbon condensate was obtained, and the design of a device for the complete foam breaking was developed. Research limitations/implications: The obtained results of laboratory studies have shown that a sharp decrease in the stability of the foam occurs under the condition of an increase in the volume of stable hydrocarbon condensate added to the studied model of mineralized formation water. Based on the results of CFD modeling, a device for breaking foam by stable hydrocarbon condensate has been worked out, the effectiveness of which will be confirmed experimentally and in field conditions. Practical implications: The results of the performed laboratory studies and CFD modelling allow a more reasonable approach to using various available methods and measures to prevent the ingress of foam with a gas-liquid flow into the separation equipment of gas gathering and treatment systems. This approach makes it possible to develop new effective ways and measures to prevent this complication. Originality/value: Based on CFD modelling, it was found that when a stable hydrocarbon condensate is supplied into a gas-liquid flow, foam breaks. A method for breaking foam in a gas-liquid flow has been developed, which is original and can be introduced in practice.

12

Developing measures to eliminate of hydrate formation in underground gas storages

Volovetskyi V. B., Doroshenko Ya. V., Bugai A. O., Kogut G. M., Raiter P. M., Femiak Y. M., Bondarenko R. V.

Journal of Achievements in Materials and Manufacturing Engineering

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2022

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Vol. 111, nr 2

64--77

EN

Purpose: The objective of this article is the analysys of methods for preventing and eliminating hydrates formations, classifying them and choosing the best ones for use in underground gas storage facilities. Comprehensive measures for the stable operation of gas storage facilities in the presence of conditions for the occurrence of hydrates formations were developed. Zones, being potentially prone to the hydrates formation during the gas storage facilities operation were identified. Design/methodology/approach: The operational parameters of gas storage wells during gas withdrawal are analyzed. The identified wells were operated under difficult conditions due to the deposition of hydrates on the wellheads, in flowlines and process equipment of gas storage facilities. The places of the highest hydrates accumulation on underground gas storages were determined: from the bottomhole of wells to the gas purification unit of the gas gathering station. Hydrate-prone zones were identified by computational fluid dynamic (CFD) modeling at the location of regulating choke installations in underground gas storage facilities. Findings: The zones of the greatest hydrates accumulation on underground gas storages were determined: from the bottomhole of wells to the gas purification unit of the gas gathering station. The analysis of the methods used in gas storage facilities of Ukraine to prevent and eliminate hydrates formation was out. A set of measures was proposed to prevent the hydrates formation in storage facilities to ensure their stable operation. Based on the Euler approach (Mixture model) by CFD modeling, zones prone to hydrates formation were determined at the installation site of regulating chokes in underground gas storages. The influence of the degree of fittings opening on the location of potential zones prone to hydrates formation was estimated. The gas-dynamic processes in the internal cavity of the gas pipeline at the installation site of the control fittings were studied and their influence on the distribution of bulk particles of the gaseous and liquid phases was established. Based on the studies performed, it was recommended to change periodically the mode of well operation for a certain time by opening or closing the regulating choke under favorable conditions for the formation of hydrates, especially at low ambient temperatures. Research limitations/implications: The obtained results of experimental studies and calculations showed that in order to solve the problem of hydrates formation at gas storage facilities, it is advisable to use diverse measures through the introduction of modern intelligent systems for monitoring and controlling the technological process. Further refinement of the algorithm of the proposed monitoring and control system with its approbation in production was provided. Practical implications: The results of the experimental studies and CFD modeling carried out allowed providing a more reasonable approach to the application of various available methods and measures to prevent hydrates formation in underground gas storage facilities. This approach made it possible to develop new effective ways and measures to prevent such complication. Originality/value: Based on the conducted experimental studies and modeling, the major zones prone to hydrates formation in underground gas storages were determined. The developed measures will allow timely detection and prevention of hydrates formation at gas storage facilities are original.

13

Investigation of gas gathering pipelines operation efficiency and selection of improvement methods

Volovetskyi V. B., Doroshenko Ya. V., Kogut G. M., Dzhus A. P., Rybitskyi I. V., Doroshenko J. I., Shchyrba O. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2021

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Vol. 107, nr 2

59--74

EN

Purpose: The article implies theoretical and experimental studies of the liquid pollution accumulations impact on the efficiency of gathering gas pipelines operation at the Yuliivskyi oil and gas condensate production facility (OGCPF). Research of efficiency of gas pipelines cleaning by various methods. Design/methodology/approach: The research methodology consists of determining the hydraulic efficiency of gathering gas pipelines before and after cleaning of their internal cavity by different methods and comparing the obtained results, which allows to objectively evaluate the efficiency of any cleaning method. CFD simulation of gas-dynamic processes in low sections of gas pipelines with liquid contaminants. Findings: Experimental studies of cleaning efficiency in the inner cavity of the gas gathering pipelines of the Yuliivskyi OGCPF by various methods, including: supply of surfactant solution, creating a high-speed gas flow, use of foam pistons were performed. It was established that cleaning the inner cavity of gas gathering pipelines by supplying a surfactant solution leads to an increase in the coefficient of hydraulic efficiency by 2%-4.5%, creating a high-speed gas flow by 4%-7%, and under certain conditions by 8%-10 % and more. However, for two gas pipelines the use of foam pistons allowed to increase the coefficient of hydraulic efficiency from 5.7 % to 10.5 % with a multiplicity of foam from 50 to 90. be recommended for other deposits.The results of CFD simulation showed that the accumulation of liquid contaminants in the lowered sections of gas pipelines affects gas-dynamic processes and leads to pressure losses above the values provided by the technological regime. With the increase in liquid contaminants volume the pressure losses occur. Moreover, with a small amount of contamination (up to 0.006 m3), liquid contaminants do not have a significant effect on pressure loss. If the contaminants volume in the lowered section of the pipeline is greater than the specified value, the pressure loss increases by parabolic dependence. The increase in mass flow leads to an increase in the value of pressure loss at the site of liquid contamination. Moreover, the greater the mass flow, the greater the impact of its changes on the pressure loss. The CFD simulation performed made it possible not only to determine the patterns of pressure loss in places of liquid contaminants accumulation in the inner cavity of gas pipelines, but also to understand the gas-dynamic processes in such places, which is an unconditional advantage of this method over experimental. Research limitations/implications: The obtained simulation results showed that the increase in the volume of liquid contaminants in the inner cavity of gas gathering pipelines leads to an increase in pressure losses above the value provided by the technological regime. To achieve maximum cleaning of gas gathering pipelines, it is necessary to develop a new method that will combine the considered. Practical implications: The performed experimental results make it possible to take a more thorough approach to cleaning the inner cavity of gas gathering pipelines and to forecast in advance to what extent the hydraulic efficiency of gas gathering pipelines can be increased. Originality/value: The obtained results of CFD simulation of gas-dynamic processes in lowered sections of gas pipelines with liquid contaminants, experimental studies of the effectiveness of various methods of cleaning the inner cavity of gas gathering pipelines has original value.

14

Experimental effectiveness studies of the technology for cleaning the inner cavity of gas gathering pipelines

Volovetskyi V. B., Doroshenko Ya. V., Tarayevs'kyy O. S., Shchyrba O. M., Doroshenko J. I., Stakhmych Yu. S.

Journal of Achievements in Materials and Manufacturing Engineering

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2021

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Vol. 105, nr 2

61--77

EN

Purpose: The purposes of the article are to determine the hydraulic efficiency of two gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF) and develop a set of measures to increase it; to experimentally determine the efficiency of using foams to increase the hydraulic characteristics of the gas gathering pipelines in the Yuliivskyi OGCPF; to develop a set of measures that will help to improve the hydraulic characteristics of gas gathering pipelines. Design/methodology/approach: The research methodology consists in determining the hydraulic efficiency of gas gathering pipelines before and after cleaning their inner cavity with foams with different expansion ratios and comparing the obtained values, which allows to objectively assess the efficiency of this cleaning method. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The pilot testing was carried out to determine the efficiency of cleaning the inner cavity of gas gathering pipelines with foams with different expansion ratios. It showed positive results. It was determined that cleaning the inner cavity of gas gathering pipelines with foams with the expansion ratio from 80 to 90 led to an increase in the hydraulic efficiency coefficient by 10.5%, and with foams with the expansion ratio from 50 to 60 - by 5.7%. The measures taken to clean the inner cavity of gas gathering pipelines from liquid contaminations have proven their efficiency and can be recommended for other fields. Research limitations/implications: The obtained results show that it is reasonable to conduct the experimental studies on the efficiency of cleaning the inner cavity of gas gathering pipelines with the foams with higher expansion ratios. To achieve the maximum quality of cleaning the gas gathering pipelines, it is necessary to develop a new method that will combine the use of foam and gel piston. Practical implications: The performed experimental studies help to take a more reasonable approach to cleaning the inner cavity of gas gathering pipelines with foams and to predict in advance the effect of the foam expansion ratio on the hydraulic efficiency of gas gathering pipelines. Originality/value: The experimental studies on the effect of foam expansion ratios on the hydraulic efficiency of gas gathering pipelines are original.

15

Developing a complex of measures for liquid removal from gas condensate wells and flowlines using surfactants

Volovetskyi V.B., Doroshenko Ya.V., Kogut G.M., Rybitskyi I.V., Doroshenko J.I., Shchyrba O.M.

Archives of Materials Science and Engineering

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2021

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Vol. 108, nr 1

24--41

EN

Purpose: The purpose of this work is to consider the complications that arise while operating gas condensate wells, in particular, the accumulation of hydrocarbon condensate, formation and condensation water at wells and flowlines, to develop a method for removing liquid from wells and flowlines before it entering a gas treatment unit and being treated with surfactants and to develop a method for the foam destruction in the gas-liquid flow. Design/methodology/approach: The operational parameters of gas-condensate wells of the Yuliivske oil and gas condensate field (OGCF) have been analysed. Wells have been identified that are operated in difficult conditions due to the accumulation of the liquid at the bottom hole and in flowlines. The volume of the liquid accumulated at the bottom hole of gas condensate wells is estimated. The quantity of surfactants, the volume and concentration of the solution required to remove the liquid were calculated individually for each well. The program of experimental researches has been made. The efficiency of the application of surfactant solution was experimentally determined and a positive result was achieved in the form of an increase in production by 10%. A new approach to the use of surfactant solution, as well as the foam destruction, has been proposed. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: Comprehensive measures are proposed to increase the efficiency of gas condensate wells operation. They are monitoring of operational parameters of wells by pressure and temperature gauges installed at the wellhead and at the inlet gas pipelines of the gas treatment unit; calculation of the volume of accumulated fluid in the wellbore and flowline; installation of a complex of automated feeding a surfactant solution of both in the annulus of the wells and in the flowline. For this purpose, two options for the complex and and have a different principle of operation. To prevent foam from entering the gas treatment unit, a method of its destruction has been proposed. The implementation of the proposed comprehensive measures will allow controlling the well operation mode, timely liquid removal from the well and the flowline and ensure stable hydrocarbon production. Research limitations/implications: The obtained results of laboratory and experimental studies have shown that using a surfactant solution is reasonable to remove the liquid from gas condensate wells. To increase the efficiency of the measure, a new method of feeding surfactant solution was developed by installing a unit for automated feeding (UAF) of a surfactant solution at the mouth. Practical implications: The results of laboratory tests allow using a surfactant solution reasonably in order to remove the liquid from gas condensate wells, as well as possible further destruction of foam in the gas-liquid flow for increasing both the efficiency of the extraction and production volume. Originality/value: On the basis of previously performed experimental research, it has been established that it is advisable to use a surfactant solution to remove the liquid from gas condensate wells and flowlines. A new method of removing liquid from gas condensate wells and flowlines has been developed, as well as a method of destroying foam in a gas-liquid flow, which are original and can be implemented.

16

Developing a set of measures to provide maximum hydraulic efficiency of gas gathering pipelines

Volovetskyi V. B., Uhrynovskyi A. V., Doroshenko Ya. V., Shchyrba O. M., Stakhmych Yu. S.

Journal of Achievements in Materials and Manufacturing Engineering

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2020

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Vol. 101, nr 1

27--41

EN

Purpose: The purposes of this article are to study the effective ways of increasing the hydraulic efficiency of gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF); to calculate the operation efficiency of gas gathering pipelines of the Yuliivskyi OGCPF and develop a set of measures to monitor their condition and improve their hydraulic characteristics; to investigate the technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam, to perform the feasibility study on the prospects of its application in practice. Design/methodology/approach: The technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam was investigated to objectively evaluate its application and determine the effectiveness of this measure. The research was carried out within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The results of production studies showed that due to cleaning the flowlines of gas-condensate wells (No.85 and No.60) from the accumulation of liquid, the coefficients of their hydraulic efficiency increased by 12% and 7%, respectively. Measures taken to clean the inner cavity of the flowlines from liquid have proven their efficiency and can be recommended for other flowlines of wells at other production fields. Research limitations/implications: Based on the characteristics of gas gathering pipelines, it is reasonable to conduct experimental studies on the use of the proposed technology of cleaning the inner cavity with foam in the case of increasing its multiplicity. Practical implications: Using the wells of the Yuliivske oil and gas condensate field as case studies, the operating parameters were measured and the pressure losses along the length of the flowlines were calculated. According to the results of calculations at two wells (No.85 and No.60), a significant excess of the actual value of the flow friction characteristic over the theoretical value was established. To reduce excessive pressure losses due to the presence of liquid and improve the hydraulic characteristics of the wells, their inner cavities were cleaned using foam with the expansion ratio from 40 to 100. Originality/value: It is important to note that the advantages of foam piston include: ease of use, no occurrence of hydraulic shocks and preventing stuck during movement in the gas pipeline, application in both straight and inclined sections, no wear of the elements of the cleaning equipment, a rather efficient cleaning of gas pipelines.