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    Wyświetlanie 1-7 z 7
    Tytuł:
    Enhanced natural gas recovery from low-permeable reservoirs
    Autorzy:
    Kondrat, O. R.
    Hedzyk, N. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/299129.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    low-permeable reservoirs
    desorption
    gas recovery factor
    Opis:
    This paper presents the analysis of challenges concerning development of natural gas fields with low- -permeable reservoirs and experimental results of conducted laboratory researches, which provide the opportunity to establish regularities of adsorption-desorption processes in tight sands and develop technologies that enable increasing gas recovery factor from low-permeable reservoirs. For this purpose, a series of laboratory experiments were carried out on the sand packed models of layers with different permeability (from 9.7 to 93 mD) using methane, nitrogen and carbon dioxide. The pressure in the experiments varied from 1 to 10 MPa, temperature – 22–60 degrees of Celsius. These studies revealed the influence of pressure, temperature, reservoir permeability and non-hydrocarbon gases injection rate on the course of adsorption-desorption processes and their impact on the gas recovery factor. The obtained results of conducted experiments show high efficiency of non-hydrocarbon gases injection to enhance gas recovery and feasibility of their application in the natural gas field with low-permeable reservoirs.
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 2; 323-339
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The maximization of the ultimate recovery factor in mature gas reservoirs implementing wellhead and field compression
    Maksymalizacja współczynnika wydobycia w sczerpanych złożach gazu ziemnego z zastosowaniem kompresji
    Autorzy:
    Stefanescu, D.-P.
    Tataru, A.
    Rotar, D.
    Popa, A.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/300463.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    eksploatacja
    gaz ziemny
    produkcja
    ciśnienie głowicowe
    exploitation
    natural gas
    production
    wellhead pressure
    Opis:
    Mature fields contribute more than 50% of the world's gas production and therefore it is necessary to understand and to optimize the performance of these reservoirs. The obvious decline of the natural gas reserves associated with relatively reduced volume of the new reserves discoveries, reclaim the implementation of a new technical-economical approach of the mature gas field. The final target is in fact, the extending the life of the reservoirs, in terms of increasing the ultimate recovery factor. One of the Romgaz concepts regarding this problem is to develop compression capacities close to the wells. Many gas wells can be subjected to increased production by reducing the wellhead pressure. By installing a compressor at the wellhead or in the field, the wellhead pressure can be reduced to increase the gas production and the ultimate recovery factor. These types of compressors are characterized by low to medium throughputs with low to medium compression ratios. The implementation of this method is imposed by production behavior of the semi-depleted Romgaz fields. The biggest advantages of this type of compression are represented by the installation low costs, a low maintenance, as well as a big flexibility at the working parameters' variation.
    Sczerpane złoża stanowią ponad 50% światowej produkcji gazu ziemnego, dlatego też konieczne staje się zrozumienie i optymalne wykorzystanie tych złóż. Konsekwentny spadek zasobów gazu ziemnego związany ze zmniejszającą się objętością odkrywanych złóż wymusza zastosowanie nowych podejść technologiczno-ekonomicznych. Ostatecznym celem badań jest wydłużenie żywotności złóż a tym samym podniesienie wartości jego wskaźnika wydobycia. Jednym z rozwiązań reprezentowanych przez Romgaz jest rozwinięcie zdolności kompresyjnych w otoczeniu otworu. W wielu otworach gazowych produkcję można zwiększyć przez obniżenie ciśnienia głowicowego. Po zainstalowaniu kompresora na głowicy lub na złożu, wartość ciśnienia może zmaleć zwiększając tym samym produkcję gazu ziemnego. Tego typu kompresory charakteryzują się średnią przepustowością i średnią bądź niską wartością współczynnika ściśliwości. Zastosowanie wymienionej metody zostało opracowane w wyniku obserwacji zachowania na wpół sczerpanych złóż gazowych Romgaz. Największą zaletą tego typu kompresji jest niski koszt instalacji, utrzymania jak i możliwość dostosowania do bardzo zmiennych parametrów roboczych.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2008, 25, 2; 659-665
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing recovery factor in multilayers mature gas field, based on decline curve analysis methodology
    Autorzy:
    Stefanescu, D. P.
    Iturbe, Y.
    Falk, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/299016.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    mature gas fields
    Laslau Mare field
    recovery factor
    Opis:
    Generally, the mature fields have a good portion of the remaining reserves still trapped due to inefficient drainage, pressure decline, inerease in water cut, sand production and aging of the existing system. This paper addresses a methodology applied on the historical produetion behavior to identify techniques and initiatives to optimize the recovery factor based on redevelopment plans in a mature field. For Laslau Mare field in particular, there have been identified and implemented opportunities such as: infill drilling, work over optimization, dynamie underbalance perforation (DUP), acidizing, kick off with N2, propellant stimulation, snubbing, soaping, sand management, Wavefront Technology stimulation and wellhead and/or group compressor installation.
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 2; 367-393
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operations for improving the gas flow in the wellbore adjacent zone
    Autorzy:
    Sutoiu, F.
    Foidas, I.
    Avramescu, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/298643.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    natural gas resources
    well operations
    stimulation technologies
    perforations
    re-perforations
    acidizing
    nitrogen injection
    polymer injection
    skin factor
    recovery factor
    Opis:
    During the whole period of a natural gas reservoir exploitation, from the start of production until the total reservoir energy depletion, may apear some phenomena which by their nature can affect the natural gas flow from the layer into the well. The flow resistance greeted by gas in the adjacent borehole may have multiple causes. In the majority of cases, geological elements are those which definitive influence the behaviour in exploitation of those reservoirs, so the existence of some traps due to the continuity and discontinuity character of the porous-permeable medium or to some reservoir parameters with low values, drasticaly reduces the posibility of extraction of a bigger volume of geological gas resource. Also the exploitation performances of gas reservoirs, through different wells, are major affected because of the skin factor. This produces an increased flow resistance in the adjacent zone of the borehole which is a plus to the resistance caused by the hydrodynamic imperfection to the mode and open degree of the productive layer. During the maturity stage of natural gas reservoirs, a special attention is granted to prevention and control of this unwanted effects which may affect natural gas flow from the reservoir into the well, through different operations. The stimulation of these productive layers through different operations aiming the reduction of geological nature constraints, thereby become a complex approach having the finality the increasing of exploitation performances itself. In Romgaz were tested and are used a series of stimulation technologies of the productive layers. From there historic we conclude that perforations or re-perforations using deep penetration tools, acidizing and nitrogen injection are applied with success to the productive wells. Regarding the increasing of the recovery factor for wells with high water income or for wells with mixed flow regime or with water drive regime, were successfully tested the polymer injection technology that helps to maintaining or optimising the productive wells.
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 2; 531-547
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analyzing and forecasting the performance of water drive gas reservoirs
    Autorzy:
    Lupu, Diana-Andreea
    Ştefănescu, Dan-Paul
    Foidaş, Ion
    Powiązania:
    https://bibliotekanauki.pl/articles/298653.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    natural gas reservoirs
    recovery factor
    water drive mechanism
    Fetkovich aquifer model
    performance prediction
    Opis:
    The manner of estimating water drive gas reservoir recovery can vary considerably. Several mathematical models have been developed for estimating water influx in petroleum industry, but the current paper will address the application of Fetkovich aquifer model to predict the gas reservoir performance considering the pressure changes that gradually occur within the aquifer and between the aquifer and reservoir. The applicability of this model has proven to be extremely useful in estimation of initial gas resources, aquifer volume and its parameters, confirming the producing mechanism but also forecasting the production performance of the gas reservoir. The authors will highlight through some case studies, the importance of the water influx analysis and prediction, in particular for natural gas reservoirs, which subsequently allows for adequate planning in optimizing the reserves’ recovery.
    Źródło:
    AGH Drilling, Oil, Gas; 2019, 36, 1; 143-159
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of Smart Field concept in mature gas field rehabilitation
    Autorzy:
    Tataru, A.
    Stefanescu, D. P.
    Simescu, A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/298749.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Smart Fields
    real-time monitoring
    production optimisation
    final recovery factor
    mature gas reservoir
    Opis:
    Since the concept of Smart Field emerged, the operating companies work hard to enable such capabilities through various technology developments, both in the field and the office. Smart Fields help to manage, deliver, optimize and develop short and long term decisions and plans. The technology of “Smart Fields” is based on the measurement of process parameters in the reservoir and on the surface [4]. Implementing Smart Gas Field help us to maximize the value of production and increase profitability, while reducing operating costs and the use of industrial services. The integrated and automated data from sensors, simulated models and controllers provide reliable diagnostic tests, enable measurable improvements and implement a favorable environment to plan and schedule phases of production [5]. The main challenge for Romgaz was to combine and integrate older system into newer one. The problem was the installed old technology equipment, which was difficult to replace by the new one. During the last years in the most majors fields has begun a process of rehabilitation. To extend the mature gas reservoir life we redeveloped and optimized the fields, improving productivity and reservoir performance. To aim these goals, today, we need monitoring / surveillance programs for optimizing the production . It is important to measure the parameters of process conditions as accurately as possible.
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 1; 183-194
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the efficiency of a gas-fueled ship power plant using a Waste Heat Recovery metal hydride system
    Autorzy:
    Cherednichenko, Oleksandr
    Tkach, Mykhaylo
    Timoshevskiy, Boris
    Havrysh, Valerii
    Dotsenko, Serhii
    Powiązania:
    https://bibliotekanauki.pl/articles/135623.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    waste heat recovery
    low-speed engine
    metal-hydride
    hydrogen
    LNG-powered ship
    total waste heat utilization factor
    Opis:
    Due to environmental, energy, and operating cost constraints, the number of liquefied natural gas (LNG)–powered ships is increasing. To avoid decreasing the thermal efficiency of two-stroke, low-speed diesel engines, high-pressure gas injection is used. The specific energy consumption of a gas fuel compressor is around 0.35 kWh/kg, which has a negative impact on the efficiency of ship power plants. To reduce the primary energy consumption of a gas fuel supply system, waste heat recovery (WHR) technologies may be used. This study investigated whether WHR metal hydride technology was suitable for improving the efficiency of low-grade heat waste in marine diesel engines. The key factors of this technology were revealed, and the design scheme was described. Working fluids were also analyzed, and a mathematical model of a WHR metal hydride plant was developed, and the results were represented. The calculations showed that the above technology could increase the operating power of a propulsion plant by 5.7–6.2%. The results demonstrate the possibility of applying WHR metal hydride equipment for gas fuel compressor drives in LNG-powered ships. The novelty of this study lies in the investigation of metal hydride technology for application in the waste heat recovery systems of LNG-powered ships.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 59 (131); 9-15
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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