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    Tytuł:
    New low-cost method for determination of heating value of natural gas
    Nowe, tanie metody oznaczania wartości opałowej gazu ziemnego
    Autorzy:
    Rybitskyi, I.
    Karpash, O.
    Darvay, I.
    Karpash, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/299334.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    wartość grzewcza
    gaz ziemny
    CO2
    prędkość akustyczna
    heating value
    natural gas
    speed of sound
    Opis:
    New method for heating value determination has been proposed earlier which lays in simultaneous measurement of carbon dioxide and nitrogen concentrations and speed of sound in natural gas and use of neural network utilized for calculation of heating value. Based on reference data bases application of the method allowed to achieve relative error of 2.6% for heating value determination. Afterwards additional investigation has been made aimed to exclude nitrogen concentration measurement, which also gave good accuracy of heating value determination. Special experimental setup has been developed for experimental verification of the method. Experimental setup included commercial ultrasonic device for speed of sound measurement, special carbon dioxide concentration meter, relative humidity and temperature measuring units. Numerous experiments were completed using the setup with subsequent natural gas chromatographic analysis. Analysis of the achieved results showed good accordance of the theoretical model with experimental data.
    W artykule zaproponowano nową metodę określania wartości grzewczej polegającą na równoczesnym pomiarze stężenia dwutlenku węgla i azotu, prędkości akustycznej gazu ziemnego i wykorzystania sieci neuronowych do obliczenia wartości grzewczej. Korzystając z metody opartej na bazie danych odniesienia uzyskano względny błąd 2,6%. Następnie przeprowadzono dodatkowe badanie ukierunkowane na oddzielenie pomiaru stężenia azotu, co również dało dokładny wynik pomiaru wartości cieplnej. Opracowano specjalny zestaw badawczy w celu przeprowadzenia doświadczalnej weryfikacji metody. Zestaw ten składa się z komercyjnego urządzenia ultradźwiękowego do pomiaru prędkości dźwięku, specjalny miernik stężenia dwutlenku węgla, jednostki do pomiaru wilgotności względnej i temperatury. Przeprowadzono równocześnie liczne eksperymenty za pomocą wspomnianego zestawu i analizę chromatograficzną gazu. Analiza uzyskanych wyników wykazała dobrą zgodność teoretycznego modelu z danymi doświadczalnymi.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2011, 28, 1-2; 333-338
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Remote monitoring system of main gas pipeline linear part sections position and condition
    System zdalnego monitorowania położenia i stanu głównych części liniowych gazociągu
    Autorzy:
    Yavorskyi, A.
    Karpash, O.
    Vaschyschak, S.
    Rybitskyi, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/299610.pdf
    Data publikacji:
    2011
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    zdalny monitoring
    gazociągi
    potencjalne zagrożenie
    niewidoczne pęknięcia
    korozja
    remote monitoring
    gas pipelines
    potential emergency
    hidden cracks
    corrosion
    Opis:
    Paper is devoted to the system for remote monitoring of areas of the linear part of main gas pipelines in the presence of geodynamic effects. This concept provides: - Identify potential emergency and dangerous places on pipelines; - localize active geodynamic zones and tectonic violation; - identify hidden cracks and separation of soil ground plane slip masses on slopes of laying and operating pipelines; - find areas of corrosion processes. Technical implementation of the above described approach involves the development of methods and tools to identify areas on the route position main gas pipeline with a high degree of risk and geodynamic development of remote monitoring of posts to be installed in the identified potentially dangerous areas.
    W artykule przedstawiono system do zdalnego monitorowania obszarów liniowej części gazociągu w warunkach zjawisk geodynamicznych. Koncepcja ta przewiduje: - określenie potencjalnego zagrożenia i niebezpiecznych miejsc na rurociągach; - lokalizację aktywnych stref geodynamicznych i zaburzeń tektonicznych; - identyfikację ukrytych pęknięć i wydzielenie płaszczyzn poślizgu gruntu w miejscach układania i działania istniejących rurociągów; - znalezienie obszarów, w których zachodzą procesy korozji. Techniczna realizacja powyżej opisanego podejścia wiąże się z opracowaniem metod i narzędzi do wyznaczania na długości rurociągu gazu miejsc o wysokim stopniu ryzyka i przygotowanie zdalnych punktów do monitorowania potencjalnie zagrożonych miejsc.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2011, 28, 1-2; 469-473
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Developing a complex of measures for liquid removal from gas condensate wells and flowlines using surfactants
    Autorzy:
    Volovetskyi, V.B.
    Doroshenko, Ya.V.
    Kogut, G.M.
    Rybitskyi, I.V.
    Doroshenko, J.I.
    Shchyrba, O.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175794.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    well
    gas
    flowline
    gas pipeline
    liquid removal
    hydrocarbon extraction
    internal cavity cleaning
    studnia
    gaz
    linia przepływu
    gazociąg
    usuwanie cieczy
    ekstrakcja węglowodorów
    czyszczenie wnęk wewnętrznych
    Opis:
    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.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 108, 1; 24--41
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of gas gathering pipelines operation efficiency and selection of improvement methods
    Autorzy:
    Volovetskyi, V. B.
    Doroshenko, Ya. V.
    Kogut, G. M.
    Dzhus, A. P.
    Rybitskyi, I. V.
    Doroshenko, J. I.
    Shchyrba, O. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2055762.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    gas
    gas gathering pipeline
    hydraulic efficiency
    liquid contamination
    foam
    inner cavity cleaning
    gaz
    rurociąg
    sprawność hydrauliczna
    piana
    Opis:
    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.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2021, 107, 2; 59--74
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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