Pub Date : 2021-05-18DOI: 10.31471/1993-9973-2021-1(78)-43-50
Б. В. Копей, О. І. Стефанишин, О. Р. Мартинець, А. Б. Стефанишин
На даний час питання підвищення надійності та довговічності нафтогазового обладнання набули особливої актуальності. Колона насосних штанг (КНШ) є однією із найслабших ланок штангових свердловинних насосних установок (ШСНУ). Саме насосні штанги різко обмежують їх надійність і довговічність. Це пов’язано із надзвичайно важкими умовами роботи насосних штанг. Змінні навантаження розтягу та згину, вплив корозійно-активного середовища, тертя до колони насосно-компресорних труб (особливо в похилоспрямованих свердловинах), відкладення асфальто-смоляно-парафінових речовин та інші експлуатаційні фактори призводять до появи та інтенсивного розвитку корозійно-втомних тріщин і, як наслідок, до руйнування колони штанг. Такі аварії пов’язані з великими матеріальними затратами на ремонт і відновлення експлуатації свердловин. Близько 70% нафтових свердловин в Україні експлуатується штанговими свердловинними насосними установками (ШСНУ). Однією з основних проблем, пов'язаних з експлуатацією обладнаних ШСНУ свердловин, є частий вихід з ладу насосних штанг (НШ). Проведений аналіз існуючих способів ремонту насосних штанг дасть можливість визначити ефективний метод їх ремонту. Запропоновано комбінований метод ремонту штанг обробкою металевими щітками та нанесенням модифікованого поліуретанового покриття. Проведені експерименти відрізків натурних штанг показують, що металеві щітки є ефективним засобом очищення і зміцнення штанг, особливо тих, які вже були в експлуатації. Встановлено, що метод комбінованого зміцнення обробкою щітками та нанесенням поліуретанового покриття додатково підвищує величину G-критерію на 20%. Модифіковане поліуретанове покриття дасть змогу підвищити стійкість штанги до стирання при терті до колони насосно-компресорних труб, з однієї сторони, та попередити відкладання асфальто-смоляно-парафінових речовин на тілі штанг, з іншої.
{"title":"Дослідження та аналіз способів ремонту насосних штанг","authors":"Б. В. Копей, О. І. Стефанишин, О. Р. Мартинець, А. Б. Стефанишин","doi":"10.31471/1993-9973-2021-1(78)-43-50","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-43-50","url":null,"abstract":"На даний час питання підвищення надійності та довговічності нафтогазового обладнання набули особливої актуальності. Колона насосних штанг (КНШ) є однією із найслабших ланок штангових свердловинних насосних установок (ШСНУ). Саме насосні штанги різко обмежують їх надійність і довговічність. Це пов’язано із надзвичайно важкими умовами роботи насосних штанг. Змінні навантаження розтягу та згину, вплив корозійно-активного середовища, тертя до колони насосно-компресорних труб (особливо в похилоспрямованих свердловинах), відкладення асфальто-смоляно-парафінових речовин та інші експлуатаційні фактори призводять до появи та інтенсивного розвитку корозійно-втомних тріщин і, як наслідок, до руйнування колони штанг. Такі аварії пов’язані з великими матеріальними затратами на ремонт і відновлення експлуатації свердловин. Близько 70% нафтових свердловин в Україні експлуатується штанговими свердловинними насосними установками (ШСНУ). Однією з основних проблем, пов'язаних з експлуатацією обладнаних ШСНУ свердловин, є частий вихід з ладу насосних штанг (НШ). Проведений аналіз існуючих способів ремонту насосних штанг дасть можливість визначити ефективний метод їх ремонту. Запропоновано комбінований метод ремонту штанг обробкою металевими щітками та нанесенням модифікованого поліуретанового покриття. Проведені експерименти відрізків натурних штанг показують, що металеві щітки є ефективним засобом очищення і зміцнення штанг, особливо тих, які вже були в експлуатації. Встановлено, що метод комбінованого зміцнення обробкою щітками та нанесенням поліуретанового покриття додатково підвищує величину G-критерію на 20%. Модифіковане поліуретанове покриття дасть змогу підвищити стійкість штанги до стирання при терті до колони насосно-компресорних труб, з однієї сторони, та попередити відкладання асфальто-смоляно-парафінових речовин на тілі штанг, з іншої.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115514229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.31471/1993-9973-2021-1(78)-17-24
S. Matkivskyi, O. Kondrat, O. Burachok, L. I. Haidarova
To investigate the effectiveness of technologies for the secondary production of hydrocarbons by injecting non-hydrocarbon gases into productive reservoirs, a study has been carried out using the Schlumberger’s prime hydrodynamic simulation tools –Eclipse and Petrel. On the basis of a live geological and technological model of the Hadiach oil and gas condensate field, an investigation has been made of the process of injecting carbon dioxide into the reservoir of the V-16 horizon in order to slow down the flow of formation water into gas-saturated intervals and displace residual natural gas reserves. Based on the results of modeling the development of the V-16 horizon of the Hadiach oil and gas condensate field, a high technological efficiency of carbon dioxide injection at the gas-water contact boundary has been established. When injecting carbon dioxide, the formation pressure in the reservoir is maintained at a higher level compared to depletion development, which leads to an increase in condensate production. The high solubility of carbon dioxide in formation fluids increases the mobility of condensate that has already fallen out in the formation, and at the same time reduces the mobility of formation water. Due to the high displacing properties of carbon dioxide, a high efficiency of its use as an injection agent is manifested in order to control the flow of formation water into productive reservoirs and increase the final hydrocarbon recovery factor. The expected gas recovery factor at the time of the breakthrough of carbon dioxide into the last of the producing wells increases by 3,22 % in terms of residual gas reserves, while the condensate recovery factor increases by 1,29 %. The practical implementation of systems for optimizing the development of hydrocarbon fields under such conditions will increase their production capabilities and, accordingly, increase the final coefficients of hydrocarbon recovery factor.
{"title":"Increasing the degree of hydrocarbon recovery factor from the water-flooded Hadiach oil and gas condensate field by injection of carbon dioxide","authors":"S. Matkivskyi, O. Kondrat, O. Burachok, L. I. Haidarova","doi":"10.31471/1993-9973-2021-1(78)-17-24","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-17-24","url":null,"abstract":"To investigate the effectiveness of technologies for the secondary production of hydrocarbons by injecting non-hydrocarbon gases into productive reservoirs, a study has been carried out using the Schlumberger’s prime hydrodynamic simulation tools –Eclipse and Petrel. On the basis of a live geological and technological model of the Hadiach oil and gas condensate field, an investigation has been made of the process of injecting carbon dioxide into the reservoir of the V-16 horizon in order to slow down the flow of formation water into gas-saturated intervals and displace residual natural gas reserves. Based on the results of modeling the development of the V-16 horizon of the Hadiach oil and gas condensate field, a high technological efficiency of carbon dioxide injection at the gas-water contact boundary has been established. When injecting carbon dioxide, the formation pressure in the reservoir is maintained at a higher level compared to depletion development, which leads to an increase in condensate production. The high solubility of carbon dioxide in formation fluids increases the mobility of condensate that has already fallen out in the formation, and at the same time reduces the mobility of formation water. Due to the high displacing properties of carbon dioxide, a high efficiency of its use as an injection agent is manifested in order to control the flow of formation water into productive reservoirs and increase the final hydrocarbon recovery factor. The expected gas recovery factor at the time of the breakthrough of carbon dioxide into the last of the producing wells increases by 3,22 % in terms of residual gas reserves, while the condensate recovery factor increases by 1,29 %. The practical implementation of systems for optimizing the development of hydrocarbon fields under such conditions will increase their production capabilities and, accordingly, increase the final coefficients of hydrocarbon recovery factor.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114483922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.31471/1993-9973-2021-1(78)-61-72
Elchin F. Veliyev
High initial heterogeneity coefficient of reservoir coupled by a long period of exploitation, leads to a decrease in the effectiveness of most EOR methods based on the displacing agents injection and significantly increase economic costs. So, for example, in fields where the main oil recovery mechanism is waterflooding appearance of high-permeability channels is inevitable. Therefore this phenomenon negatively affects oil recovery factor, the displacement front uniformity and the injectivity profile. One of the most successful technologies to overcome these complications is the in-situ fluid diversion techniques based on creation of gel banks deep in the formation. The article presents a polymer-dispersed system (PDS) for deep flow diversion using on modified bentonite particles. Initially, bentonite particles were intercalated with precursor molecules, then copolymers of N-isopropylacrylamide (NIPAM) and acrylic acid (AA) were grafted onto the hydrophilic surface of bentonite particles by a graft polymerization reaction. The paper presents the study results of the physicochemical properties, rheology and colloid stability. The residual resistance factor has also been studied on sandpacks and core samples from the Azeri-Chirag-Guneshli field. The results of experiments shows increased hydraulic resistance while injection of PDS due to a sharp decrease in permeability. Core studies confirmed obtained results, showing a 61% decrease in permeability accompanied by an 11% increase in oil recovery. It was concluded that proposed composition is effective as deedp divertion agent and can increase oil recovery.
{"title":"Polymer dispersed system for in-situ fluid diversion","authors":"Elchin F. Veliyev","doi":"10.31471/1993-9973-2021-1(78)-61-72","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-61-72","url":null,"abstract":"High initial heterogeneity coefficient of reservoir coupled by a long period of exploitation, leads to a decrease in the effectiveness of most EOR methods based on the displacing agents injection and significantly increase economic costs. So, for example, in fields where the main oil recovery mechanism is waterflooding appearance of high-permeability channels is inevitable. Therefore this phenomenon negatively affects oil recovery factor, the displacement front uniformity and the injectivity profile. One of the most successful technologies to overcome these complications is the in-situ fluid diversion techniques based on creation of gel banks deep in the formation. The article presents a polymer-dispersed system (PDS) for deep flow diversion using on modified bentonite particles. Initially, bentonite particles were intercalated with precursor molecules, then copolymers of N-isopropylacrylamide (NIPAM) and acrylic acid (AA) were grafted onto the hydrophilic surface of bentonite particles by a graft polymerization reaction. The paper presents the study results of the physicochemical properties, rheology and colloid stability. The residual resistance factor has also been studied on sandpacks and core samples from the Azeri-Chirag-Guneshli field. The results of experiments shows increased hydraulic resistance while injection of PDS due to a sharp decrease in permeability. Core studies confirmed obtained results, showing a 61% decrease in permeability accompanied by an 11% increase in oil recovery. It was concluded that proposed composition is effective as deedp divertion agent and can increase oil recovery.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127469859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.31471/1993-9973-2021-1(78)-35-42
І. L. Mykhalevych
The article dwells upon the effective method of seismic data analysis called spectral decomposition. This method has been used worldwide for identifying additional geological features, as a tool for seismic geomorphology in the conditions of complicated geological structures during identification of paleochannels, lenses, and thin formations. It should be noted that spectral decomposition is not a direct tool for identifying the hydrocarbon saturation. It allows to represent the seismic data in the RGB format (red, green, blue) by way of decomposing seismic data into frequency elements. Authors demonstrate results of applying the seismic data spectral decomposition method within the terrigenous deposits on the example of gas fields in the Carbon age within the northern edge of Dnieper-Donets Depression. Based on the results of the available seismic material analysis, it has been shown that within thick and porous sand bodies, spectral decomposition demonstrates reasonable results, and the most informative frequencies are 25, 28, 31, 37, 39, 47, 56 Hz. By confirming the really existing deposits in the Moskovian and Bashkirian ages, spectral decomposition gives grounds for considering this method an effective tool to be used within the northern edge of the DDD, because the latter usually clearly responds to lithology, and sometimes even to saturation. The 8 most representative horizons have been analyzed: М-2а, М-3а, М-4, М-6, М-7, B-6 (at different stratigraphic levels), B-7 and S-6. The most definite results have been received within the following horizons: M-2a (the deposit has been confirmed by drilling), M-3a (the deposit and paleochannel have been confirmed by drilling), M-4 (paleochannel). Having regarded the spectral decomposition in complex with the results of other geophysical methods, some perspective objects have been identified. The bodies have been confirmed by the results of AVO and Vp/Vs analyses. Both objects served the targets for two prospecting wells located in the most optimal conditions. It has been brightly illustrated that the spectral decompositions as a tool for geological prospecting should be specifically used when some individual lenses and channel bodies are being prospected, with structural factor being present.
{"title":"Applying spectral decomposition for identifying lithological objects within Northern edge of Dnieper-Donets Depression","authors":"І. L. Mykhalevych","doi":"10.31471/1993-9973-2021-1(78)-35-42","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-35-42","url":null,"abstract":"The article dwells upon the effective method of seismic data analysis called spectral decomposition. This method has been used worldwide for identifying additional geological features, as a tool for seismic geomorphology in the conditions of complicated geological structures during identification of paleochannels, lenses, and thin formations. It should be noted that spectral decomposition is not a direct tool for identifying the hydrocarbon saturation. It allows to represent the seismic data in the RGB format (red, green, blue) by way of decomposing seismic data into frequency elements. Authors demonstrate results of applying the seismic data spectral decomposition method within the terrigenous deposits on the example of gas fields in the Carbon age within the northern edge of Dnieper-Donets Depression. Based on the results of the available seismic material analysis, it has been shown that within thick and porous sand bodies, spectral decomposition demonstrates reasonable results, and the most informative frequencies are 25, 28, 31, 37, 39, 47, 56 Hz. By confirming the really existing deposits in the Moskovian and Bashkirian ages, spectral decomposition gives grounds for considering this method an effective tool to be used within the northern edge of the DDD, because the latter usually clearly responds to lithology, and sometimes even to saturation. The 8 most representative horizons have been analyzed: М-2а, М-3а, М-4, М-6, М-7, B-6 (at different stratigraphic levels), B-7 and S-6. The most definite results have been received within the following horizons: M-2a (the deposit has been confirmed by drilling), M-3a (the deposit and paleochannel have been confirmed by drilling), M-4 (paleochannel). Having regarded the spectral decomposition in complex with the results of other geophysical methods, some perspective objects have been identified. The bodies have been confirmed by the results of AVO and Vp/Vs analyses. Both objects served the targets for two prospecting wells located in the most optimal conditions. It has been brightly illustrated that the spectral decompositions as a tool for geological prospecting should be specifically used when some individual lenses and channel bodies are being prospected, with structural factor being present.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129847371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.31471/1993-9973-2021-1(78)-51-60
N. Hedzyk, L. I. Haidarova
The final stage of development of natural gas fields is characterized by depletion of reservoir energy, deterioration of the bottomhole formation zone, which leads to low gas and condensate flow rates. Development of new and improvement of existing technologies for stimulation of oil and gas production for the conditions of Ukrainian fields should be carried out taking into account the fact that most fields are in the final stage of development; production wells are mainly marginal, water-flooded and are characterized by a significant decrease in the natural filtration properties of the bottomhole formation zone due to its colmatage with filtrates and dispersed particles used in drilling, well operation or workover, deposits of resins, asphaltens, paraffins, forming of high viscosity emulsions, swelling of the clay particles of the formation present in the reservoir, and the presence of other clogging agents. The well, its bottomhole zone and the formation part between the wells are interconnected and interacting elements of a single system. Failure to take into account the features and degree of impact of the bottomhole formation zone as one of the system’s elements leads to a general decrease in the development efficacy of the field as a whole. Therefore, the choice of technologies for the impact on the bottomhole formation zone requires a very careful assessment, taking into account the technological efficiency and payout time. The aim of the research is to determine the influence of the bottomhole formation treatment parameters on the well productivity. The tasks have been performed by analyzing the literature and conducting analytical calculations of the impact of various parameters of the treatment zone on the flow rate of the well. The described methods and results of calculations can be implemented in production when planning the action on the bottomhole formation zone by selecting the optimal treatment parameters at different stages of field development.
{"title":"The research of the gas wells bottomhole formation zone treatment efficiency","authors":"N. Hedzyk, L. I. Haidarova","doi":"10.31471/1993-9973-2021-1(78)-51-60","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-51-60","url":null,"abstract":"The final stage of development of natural gas fields is characterized by depletion of reservoir energy, deterioration of the bottomhole formation zone, which leads to low gas and condensate flow rates. Development of new and improvement of existing technologies for stimulation of oil and gas production for the conditions of Ukrainian fields should be carried out taking into account the fact that most fields are in the final stage of development; production wells are mainly marginal, water-flooded and are characterized by a significant decrease in the natural filtration properties of the bottomhole formation zone due to its colmatage with filtrates and dispersed particles used in drilling, well operation or workover, deposits of resins, asphaltens, paraffins, forming of high viscosity emulsions, swelling of the clay particles of the formation present in the reservoir, and the presence of other clogging agents. The well, its bottomhole zone and the formation part between the wells are interconnected and interacting elements of a single system. Failure to take into account the features and degree of impact of the bottomhole formation zone as one of the system’s elements leads to a general decrease in the development efficacy of the field as a whole. Therefore, the choice of technologies for the impact on the bottomhole formation zone requires a very careful assessment, taking into account the technological efficiency and payout time. The aim of the research is to determine the influence of the bottomhole formation treatment parameters on the well productivity. The tasks have been performed by analyzing the literature and conducting analytical calculations of the impact of various parameters of the treatment zone on the flow rate of the well. The described methods and results of calculations can be implemented in production when planning the action on the bottomhole formation zone by selecting the optimal treatment parameters at different stages of field development.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123277534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.31471/1993-9973-2021-1(78)-25-34
R. Kondrat, L. I. Haidarova
Based on the analysis of publications in domestic and foreign scientific and technical publications, the directions of increasing gas recovery from depleted gas reservoirs, which include the displacement of residual gas from the porous medium with nitrogen, are substantiated. Nitrogen can be obtained from the air in any oil and gas producing area using membrane, adsorption or cryogenic types of plants produced by the industry. The final gas recovery factor can be adjusted by choosing certain values of technological parameters that characterize the process of reservoir development. Using hypothetical digital models, the influence on the total final gas recovery factor and the residual gas recovery factor of the pressure of the beginning of nitrogen injection into the reservoir, the rate, duration and cyclicity of its injection, the system for locating production and injection wells on the gas-bearing area and the technological modes of their operation was investigated. The results of the studies are shown in the form of graphical dependencies of the final gas recovery factor and the gas recovery factor for residual gas on the investigated determining parameters. Using the research results, the optimal values of the parameters of the nitrogen injection process into a depleted gas reservoir of square and round shapes and the corresponding values of the gas recovery coefficient have been established. The results of the studies performed indicate a significant technological efficiency of the displacement of residual gas by nitrogen from depleted gas reservoirs. Depending on the system of placement of production and injection wells in the gas-bearing area and the technological parameters of the nitrogen injection process into the reservoir, the gas recovery factor for the residual gas varies on average within the range of 53,97 – 61,82 %.
{"title":"Improving the efficiency of additional development of depleted gas reservoirs by displacing the residual gas with nitrogen","authors":"R. Kondrat, L. I. Haidarova","doi":"10.31471/1993-9973-2021-1(78)-25-34","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-25-34","url":null,"abstract":"Based on the analysis of publications in domestic and foreign scientific and technical publications, the directions of increasing gas recovery from depleted gas reservoirs, which include the displacement of residual gas from the porous medium with nitrogen, are substantiated. Nitrogen can be obtained from the air in any oil and gas producing area using membrane, adsorption or cryogenic types of plants produced by the industry. The final gas recovery factor can be adjusted by choosing certain values of technological parameters that characterize the process of reservoir development. Using hypothetical digital models, the influence on the total final gas recovery factor and the residual gas recovery factor of the pressure of the beginning of nitrogen injection into the reservoir, the rate, duration and cyclicity of its injection, the system for locating production and injection wells on the gas-bearing area and the technological modes of their operation was investigated. The results of the studies are shown in the form of graphical dependencies of the final gas recovery factor and the gas recovery factor for residual gas on the investigated determining parameters. Using the research results, the optimal values of the parameters of the nitrogen injection process into a depleted gas reservoir of square and round shapes and the corresponding values of the gas recovery coefficient have been established. The results of the studies performed indicate a significant technological efficiency of the displacement of residual gas by nitrogen from depleted gas reservoirs. Depending on the system of placement of production and injection wells in the gas-bearing area and the technological parameters of the nitrogen injection process into the reservoir, the gas recovery factor for the residual gas varies on average within the range of 53,97 – 61,82 %.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132591813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-29DOI: 10.31471/1993-9973-2021-1(78)-7-16
S. Kurovets, Е. О. Chornyi
Здійснено регіональне прогнозування пластових вуглеводневих систем для газових родовищ Зовнішньої зони Передкарпатського прогину. Установлено залежності поширення різних типів вуглеводневих систем, що уможливлює їх прогнозування на великих глибинах в області високих температур і тисків на початкових стадіях пошукових робіт. За результатами проведених аналізів існує значна розбіжність у складі вільних газів, що робить малоефективним застосування класичної статистичної обробки наявних матеріалів. Проте, за домінуючим масивом точок вдається визначити тенденції до зміни вмісту в газі окремих компонентів, які в сумі характеризують повний (100 % об’ємних) склад флюїду на різних рівнях глибин залягання покладів для двох частин Зовнішньої зони – північно-західної та південно-східної. Побудовано графіки та виведено відносно глибин залягання покладів рівняння регресії прогнозних параметрів, які входять у формулу підрахунку запасів вуглеводнів об’ємним методом. Виведені рівняння регресії для прогнозування в поєднані з лабораторними дослідженнями термобаричних умов (тиску і температури) з глибиною, оскільки відомості про них потрібні для обчислення окремих параметрів вуглеводневих систем.
{"title":"Forecasting parameters of hydrocarbon systems for gas deposits of the Outer zone of Precarpathian Foredeep","authors":"S. Kurovets, Е. О. Chornyi","doi":"10.31471/1993-9973-2021-1(78)-7-16","DOIUrl":"https://doi.org/10.31471/1993-9973-2021-1(78)-7-16","url":null,"abstract":"Здійснено регіональне прогнозування пластових вуглеводневих систем для газових родовищ Зовнішньої зони Передкарпатського прогину. Установлено залежності поширення різних типів вуглеводневих систем, що уможливлює їх прогнозування на великих глибинах в області високих температур і тисків на початкових стадіях пошукових робіт. За результатами проведених аналізів існує значна розбіжність у складі вільних газів, що робить малоефективним застосування класичної статистичної обробки наявних матеріалів. Проте, за домінуючим масивом точок вдається визначити тенденції до зміни вмісту в газі окремих компонентів, які в сумі характеризують повний (100 % об’ємних) склад флюїду на різних рівнях глибин залягання покладів для двох частин Зовнішньої зони – північно-західної та південно-східної. Побудовано графіки та виведено відносно глибин залягання покладів рівняння регресії прогнозних параметрів, які входять у формулу підрахунку запасів вуглеводнів об’ємним методом. Виведені рівняння регресії для прогнозування в поєднані з лабораторними дослідженнями термобаричних умов (тиску і температури) з глибиною, оскільки відомості про них потрібні для обчислення окремих параметрів вуглеводневих систем.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"87 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126097329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-28DOI: 10.31471/1993-9973-2020-4(77)-16-22
R. Kondrat, N. Dremliukh, L. I. Haidarova
The negative consequences of sand production from the formation into the wellbore during the operation of wells with unstable rocks are characterized. A highly effective method of preventing sand from entering the well from the formation is the use of gravel packs, which are used in Ukraine and abroad. The types of gravel packs, the conditions for their application, the choice of the diameter of gravel grains for creating gravel pack are given. The types of gravel pack installation are considered depending on the geological and technical conditions of the reservoir. Calculations have been performed using Schlumberger's PipeSim software to assess the effect of gravel pack size and permeability on the performance specification of a gas well. Based on the research results, graphical de-pendences of gas flow rates in the presence of gravel pack on the permeability of the gravel pack at its various thicknesses have been constructed and analyzed. It has been found that the gas flow rate increases with an increase in the thickness of the gravel pack in the considered interval of its variation up to 0.9 m. The effect of the thickness of the gravel pack on the gas flow rate increases with an increase in its permeability. Based on the results of statistical processing of the calculated data using the least-squares method, the optimal values of the gravel pack permeability for various values of its thickness have been determined. The optimal values of the thickness and permeability of the gravel pack have been determined, beyond which the value of the gas flow rate practically does not change. The calculation of the pressure distribution along the bore of a gas well in the presence of gravel pack with certain optimal values of its permeability and thickness is performed. Using the PipeSim software, the influence of the de-gree of relative formation penetration on the productivity of a gas well in the presence of gravel packing has been investigated for determining certain optimal values of permeability and thickness of gravel packing.
{"title":"Investigation of the influence of gravel stuffing in an open drill on the productive characteristics of the well","authors":"R. Kondrat, N. Dremliukh, L. I. Haidarova","doi":"10.31471/1993-9973-2020-4(77)-16-22","DOIUrl":"https://doi.org/10.31471/1993-9973-2020-4(77)-16-22","url":null,"abstract":"The negative consequences of sand production from the formation into the wellbore during the operation of wells with unstable rocks are characterized. A highly effective method of preventing sand from entering the well from the formation is the use of gravel packs, which are used in Ukraine and abroad. The types of gravel packs, the conditions for their application, the choice of the diameter of gravel grains for creating gravel pack are given. The types of gravel pack installation are considered depending on the geological and technical conditions of the reservoir. Calculations have been performed using Schlumberger's PipeSim software to assess the effect of gravel pack size and permeability on the performance specification of a gas well. Based on the research results, graphical de-pendences of gas flow rates in the presence of gravel pack on the permeability of the gravel pack at its various thicknesses have been constructed and analyzed. It has been found that the gas flow rate increases with an increase in the thickness of the gravel pack in the considered interval of its variation up to 0.9 m. The effect of the thickness of the gravel pack on the gas flow rate increases with an increase in its permeability. Based on the results of statistical processing of the calculated data using the least-squares method, the optimal values of the gravel pack permeability for various values of its thickness have been determined. The optimal values of the thickness and permeability of the gravel pack have been determined, beyond which the value of the gas flow rate practically does not change. The calculation of the pressure distribution along the bore of a gas well in the presence of gravel pack with certain optimal values of its permeability and thickness is performed. Using the PipeSim software, the influence of the de-gree of relative formation penetration on the productivity of a gas well in the presence of gravel packing has been investigated for determining certain optimal values of permeability and thickness of gravel packing.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132906324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-28DOI: 10.31471/1993-9973-2020-4(77)-31-40
D. Panevnyk
The scope of downhole ejection systems is limited by the low value of the efficiency of the jet pump, the value of which usually does not exceed 35 %. Significant energy losses when mixing flows are the reason for the low efficiency of the jet pump. The energy performance of the downhole ejection system can be increased by creating swirling vortex circulating currents in the flow part of the jet pump. This optimizes the nature of the flow mixing and increases the energy performance of the jet pump. In the process of studying the structures, features of the working process and usage experience of ejection systems designed for drilling, operation and repair of oil and gas wells, it is established that the twisting of the working medium in downhole jet pumps can be carried out using guide elements placed at a certain angle in the oncoming flow and rotation of individual parts of the ejection system by means of an external drive and hydraulic turbines. The use of guide elements and hydraulic turbines necessitates the use of part of the energy of the working flow, which drives the downhole jet pump, to spin the working medium. In oil and gas ejection systems, the twisting of working, injected and mixed streams can be realized, as well as the combined simultaneous twisting of several streams. In the process of analyzing the experience of using vortex jet devices, it has been found that the flow twist allows to increase the injection coefficient of the jet pump by 38.1 %, efficiency – up to 70 %, vacuum in the receiving ch amber – up to 40 %. The increase in the basic geometric pa-rameter of the jet pump reduces the effect of flow twist on the characteristics of the ejection system. Flow twisting in downhole jet pumps can be recommended in the implementation of long-term processes, for example, in the ex-traction of formation fluid, when the value of the efficiency of the ejection system significantly affects the cost of oil production.
{"title":"Investigation of the flow twist influence on the well jet pumps characteristic","authors":"D. Panevnyk","doi":"10.31471/1993-9973-2020-4(77)-31-40","DOIUrl":"https://doi.org/10.31471/1993-9973-2020-4(77)-31-40","url":null,"abstract":"The scope of downhole ejection systems is limited by the low value of the efficiency of the jet pump, the value of which usually does not exceed 35 %. Significant energy losses when mixing flows are the reason for the low efficiency of the jet pump. The energy performance of the downhole ejection system can be increased by creating swirling vortex circulating currents in the flow part of the jet pump. This optimizes the nature of the flow mixing and increases the energy performance of the jet pump. In the process of studying the structures, features of the working process and usage experience of ejection systems designed for drilling, operation and repair of oil and gas wells, it is established that the twisting of the working medium in downhole jet pumps can be carried out using guide elements placed at a certain angle in the oncoming flow and rotation of individual parts of the ejection system by means of an external drive and hydraulic turbines. The use of guide elements and hydraulic turbines necessitates the use of part of the energy of the working flow, which drives the downhole jet pump, to spin the working medium. In oil and gas ejection systems, the twisting of working, injected and mixed streams can be realized, as well as the combined simultaneous twisting of several streams. In the process of analyzing the experience of using vortex jet devices, it has been found that the flow twist allows to increase the injection coefficient of the jet pump by 38.1 %, efficiency – up to 70 %, vacuum in the receiving ch amber – up to 40 %. The increase in the basic geometric pa-rameter of the jet pump reduces the effect of flow twist on the characteristics of the ejection system. Flow twisting in downhole jet pumps can be recommended in the implementation of long-term processes, for example, in the ex-traction of formation fluid, when the value of the efficiency of the ejection system significantly affects the cost of oil production.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127338173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-28DOI: 10.31471/1993-9973-2020-4(77)-7-15
L. Chelyadyn, V. Ribun, V. V. Vizinovych, І. V. Tarasiuk
Quantitative and qualitative characteristics of multi-ton materials in Ukraine and in Ivano-Frankivsk region, which Quantitative and qualitative characteristics of multi-ton materials in Ukraine and in Ivano-Frankivsk region, which contain energy components, are given. It is proposed to process water treatment sludges containing petro-leum products by preparing a raw material mixture from the following man-made substances: oil sludge, ash, zeo-lite screenings, calcium-containing compounds and viscous materials. The optimal composition of the raw material mixture is as follows: as a filler for construction products (concrete): ash – 60-65 %, liquid glass s olution – 5-7 %, limestone dust – 3-5 %, organic additives – 7-10 %, soda ash – 10-12 %, which is granulated and heat t reated at 120-140 °C. The research results and technical char acteristics of the obtained granular materials, which are formed from a mixture containing a significant amount of hydrocarbon sludge, have lower strength, but greater porosity and lower thermal conductivity. Granules from a mixture № 4-7 are characterized by higher strength, and due to their properties they belong to the structural and thermal insulation materials. The technology of obtaining a raw material mixture for soda production is based on the LeBlanc process – the interaction in the seco nd stage of sodium sulfate, carbon and calcium carbonate with the formation of calcium sulfide, sodium carbonate and carbon (IV) oxide. It is proposed to prepare a raw mixture for the production of sodium carbonate from sodium sulfate con-taining petroleum product, which is formed by the technology of obtaining oxygen-containing additives, and sludge containing petroleum products, which will provide a high temperature during the soda production process. The processing of sludge from oil refining and energy facilities into granular materials shows that they can be used in the construction industry and soda production, which reduces the energy consumption of the processes of obtaining such materials.
{"title":"Technology of conversion of materials of power and oil refining objects","authors":"L. Chelyadyn, V. Ribun, V. V. Vizinovych, І. V. Tarasiuk","doi":"10.31471/1993-9973-2020-4(77)-7-15","DOIUrl":"https://doi.org/10.31471/1993-9973-2020-4(77)-7-15","url":null,"abstract":"Quantitative and qualitative characteristics of multi-ton materials in Ukraine and in Ivano-Frankivsk region, which Quantitative and qualitative characteristics of multi-ton materials in Ukraine and in Ivano-Frankivsk region, which contain energy components, are given. It is proposed to process water treatment sludges containing petro-leum products by preparing a raw material mixture from the following man-made substances: oil sludge, ash, zeo-lite screenings, calcium-containing compounds and viscous materials. The optimal composition of the raw material mixture is as follows: as a filler for construction products (concrete): ash – 60-65 %, liquid glass s olution – 5-7 %, limestone dust – 3-5 %, organic additives – 7-10 %, soda ash – 10-12 %, which is granulated and heat t reated at 120-140 °C. The research results and technical char acteristics of the obtained granular materials, which are formed from a mixture containing a significant amount of hydrocarbon sludge, have lower strength, but greater porosity and lower thermal conductivity. Granules from a mixture № 4-7 are characterized by higher strength, and due to their properties they belong to the structural and thermal insulation materials. The technology of obtaining a raw material mixture for soda production is based on the LeBlanc process – the interaction in the seco nd stage of sodium sulfate, carbon and calcium carbonate with the formation of calcium sulfide, sodium carbonate and carbon (IV) oxide. It is proposed to prepare a raw mixture for the production of sodium carbonate from sodium sulfate con-taining petroleum product, which is formed by the technology of obtaining oxygen-containing additives, and sludge containing petroleum products, which will provide a high temperature during the soda production process. The processing of sludge from oil refining and energy facilities into granular materials shows that they can be used in the construction industry and soda production, which reduces the energy consumption of the processes of obtaining such materials.","PeriodicalId":159170,"journal":{"name":"Prospecting and Development of Oil and Gas Fields","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129808765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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