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Упит dcterms_subject_txt:Gas Hydrate Formation

344 items

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... suggest that main factor for its occurrence was the sudden re- lease of methane hydrate from oceanic sediments caused by massive volcanic eruptions. Recent study by GINGERICH (2019) compared the rate of greenhouse gas accumulation in the PETM to modern climate change today (Fig. 10) and find out that ...
    ... recent research on the Trias- sic Chinle Formation in Petrified Forest National Park in Arizona confirms the existence of a foreseen 405.000-year Milanković’s cycle influenced by the movement of the planets jupiter and venus. The core samples from the Chinle Formation were dated and correlated to Newark Basin ...
    ... Earth’s oceans to reach Antarctica (Fig. 9). This seems to have played a key role in the formation of the icehouse due to the up- welling of cold water from the deeper parts of the water column that aided the formation of ice sheets. The Late Cenozoic Ice Age that began 33.9 mil- lion years ago was probably ...

  • Preparation, synthesis and characterization of nanometric Ca0.9Er0.1MnO3

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... a dual role (complexant and fuel), and metal nitrates were used as oxidants - calcium nitrate tetrahydrate Ca(NOs),x*4H,O, manganese(II) nitrate hydrate Mn(NOyx)xH,O, erbium(III) nitrate pentahydrate Er(NOs)sx5H,O. Nanopowder was prepared by combining metal nitrates in thcir respective stoichiometric ...

  • Synthesis and characterization of nanostructured Ca0.9Er0.1MnO3

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... combustion method, sucrose Ci.H»Ori which is both fuel and complexant and metal ions in the form of calcium nitrate tetrahydrate, manganese(II) nitrate hydrate, erbium(III) nitrate pentahydrate were used. Metal nitrates and sucrose were combined to prepare this nanostructured in their appropriate stoichiometric ...

  • Investigation of nanostructured Ca0.9Er0.1MnO3 obtained by sucrose nitrate procedure

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... sucrose, which plays the role of fuel and complexant. Other chemicals used are calcium nitrate tetrahydrate Ca(NOxy))x4H.O, manganese nitrate hydrate Mn(NOx)>xH»O, erbium nitrate pentahydrate Er(NOay)ax5H»O. Metal nitrates and sucrose were mixed in stoichiometric ratios, in order to obtain a perovskite ...

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... wellhead therefore limiting any corrosion and hydrate formation. To be able to handle 1 Mt CO per year, four parallel units were needed. Each unit has a fluid knockout drum, a compressor, a cooler and a gas turbine driver. Again, the compressor train with its gas turbine drive was designed and installed ...
    ... HBauification — Gas treatment — Utilization Figure 3.2 Desalination process 3.2. Enhanced Oil Recovery Enhanced oil/gas recovery refers to the injection of materials into the reservoir to maintain the pressure in the formation and to release trapped oil/gas within the pores of the formation. The recovery ...
    ... operations with calcium oxide or be used as a feedstock for the synthesis of ammonia and chlorine. The hydrate-forming method is another technique that is used for desalination, and it involves the formation of hydrates by using CO2 to separate the salts from water [16]. A challenge with the desalination ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... the Kolubara lignite, which released only 19.64 nmol CO2 g -1 day-1 (Fig. 5a). Desorption of CO2 gas from lignites requires the consideration of both physical desorption and biological de novo formation, which co- occur. It is a well-known phenomenon that low rank coals adsorb CO2 and that (due to ...
    ... materials (Prem et al., 2021). 3.3. Nitrous oxide formation Nitrous oxide is approximately 265 times more potent than CO2 in atmospheric warming and contributes to stratospheric ozone depletion (Liu et al., 2020). Most anthropogenic emissions of this gas occur in drained peatlands (Liu et al., 2020). Peat ...
    ... the restoration of anaerobic conditions in the deposit and the re- activation of processes the lead to the formation of potent GHG, i.e., CH4, CO2 and N2O. Here, we hypothesize that GHG formation occurs in aban- doned and submerged lignites. We also aim to recognize the GHG pro- duction potential of lignites ...

  • Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field

    Bojan Martinović, Dušan Danilović, Branko Grubač, Robert Fadiga (2022)
    Most of the wells in the oilfield Turija are operating with sucker rod pumps, where casing pressure at around 15 bar, and with marginal production rates. The high value of casing pressure indicates high pressure on the face of the formation and depends directly on well productivity. In addition, with increasing value of the casing pressure gas column in the annulus is moving the dynamic fluid level near pump intake and more gas is entering the pump, it results ...
    beam gas compressor, BGC, increase productivity, sucker rod pump, SRP, mature field, artificial lift, production optimisation

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology

  • Analiza rada električnih centrifugalnih pumpi

    Milica Stanojević (2024)
    Ovaj rad analizira rad električne centrifugalne pumpe (ESP) u naftnoj industriji, sa fokusom na problem taloženja kamenca (karbonatnih naslaga) unutar sistema. Električne centrifugalne pumpe (ESP) predstavljaju srce mnogih naftnih bušotina. Njihova visoka pouzdanost i sposobnost rada u zahtevnim uslovima čine ih neophodnim za stabilnu i kontinuiranu proizvodnju.Senzori igraju ključnu ulogu u praćenju rada ESP sistema i detekciji ranih znakova taloženja kamenca. Problem taloženja kamenca je izuzetno značajan, jer može dovesti do smanjenja efikasnosti pumpe, povećanja troškova održavanja, i dugoročnih zastoja ...
    električne centrifugalne pumpe (ESP), formiranje kamenca (karbonatnih naslaga), hemijski inhibitori
    ... rada električnih centifugalnih pumpi 26.Benchmark Lab., n.d. URL: https://benchmark-lab.com/services- archives/scale-formation-in-oil-wells/ 27.Fatmala, N., 2016. „Hydrate/Bax/A4sphalt in Subsea Pipeline“. URL: https://nfatmala.blogspot.com/2016/02/hydratewaxasphalt-in-subsea- pipeline.html ...
    ... Standardni i integrirani usis ne odvajaju gas. lako može doći do odvajanja gasa ı tečnosti, to se dešava kao prirodno odvajanje jer deo gasa ne uđe zajedno s tečnošću u usis. Ova vrsta usisa koristi se kod bušotina koje imaju izrazito mali udeo gasa u proizvodnom fluidu. Za pumpe s radijalnim ...
    ... rešenjima koja onemogućavaju ulazak slobodnog gasa u pumpu. Postoje dve vrste separatora a to su statički (povratnog toka) separator gasa ı dinamički (rotacijski) separator gasa. Izvorni dizajn gasnih separatora temeljili su se na povećanom odvajanju gasa prisiljavanjem toka fluida prema bušotini ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • Gas-lift wells optimization at the oil field "K"

    Dušan Danilović, Marija Ilić, Miroslav Crnogorac, Lola Tomić (2022)
    naftna bušotina, raspodela gasa, gas-lift, optimizacija

  • Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia

    Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić (2019)
    Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology
    ... are known in the Internal Dinarides under the name of “Grivska Formation”. This formation was infor- mally established by DIMITRIJEVIĆ & DIMITRIJEVIĆ (1991) and supposed to be synchronous with the lower part of Wetterstein Formation (Ladinian) (DIMITRIJEVIĆ & DIMITRIJEVIĆ, 1991). According to ...
    ... revised the Grivska Formation using new biostratigraphic and microfacial data. The age of Grivska Formation was determined on the base of conodonts as Late Triassic (Carnian-Rhaetian) (Su- DAR & GAWLICK, 2018). It should be noted that lime- stones ofthe Grivska Formation are characterized by ...
    ... The Grivska Formation was informally introduced by DIMITRIJEVIĆ: & · DIMITRIJEVIĆ (1987, 1991): the definition of this formation was not based on chronostratigraphy only, but it also took into ac- count lithostratigraphic and facial aspects. Sediments of the Grivska Formation were i ...

  • Анализа рада гас лифта на нафтном пољу К

    Тамара Бркан (2024)
    Анализа рада гас лифта укључује детаљну процену перформанси, идентификацију проблема, симулацију и моделирање, као и опримизацију и прилагођавање система. Циљ је осигурати да гас лифт функционише ефикасно уз повећање производње и уз што мање оперативне трошкове. У даљем тексту биће описана анализа рада гас лифта на нафтном пољу К, као и поређење најекономичнијег решења.
    поврмени гас лифт, континуални гас лифт, оперативни вентил, компримован гас
    ... Измењено: 2024-09-25 11:03:46 Анализа рада гас лифта на нафтном пољу К Тамара Бркан Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Анализа рада гас лифта на нафтном пољу К | Тамара Бркан | | 2024 | | http://dr.rgf.bg.ac.rs/s ...
    ... SA VENTILI KOJI ! MEHOM, REAGUJU NA ı ISPUNJENI | —K PRITISAK U ! KOMPRIMOVANIM TUBINGU l GASOM l | || VENTILI SA || MEHOM ISUNJENI DIERENCIUALNMI __ L PILOT VENTIL SA KOMPRIMOVANIM OPRUGOM GASOM SA DUPLOM ZAŠTITOM KOMBINOVANI VENTILI PILOTVENTII +— Cnuka 2.2 – Tun zac nudim eenmuna ...
    ... l | VENTILI SA NEURAVNOTEŽEN ; MEHOM IVENTIL KOJI ı ISPUNJENI | —K REAGUJENA -— |, VENTILI SA MEHOM KOMPRIMOVANIM PRITISAKU 7 ISPUNJENI AZOTOM GASOM (AZOTOM) MEĐUPROSTORU | ' VENTILI SA URAVNOTEŽENI ! MEHOM VENTIL KOJI l NAPUNJENI REAGUJENA —K ! TEČNOŠĆU SA PRITISAK U || OPRUGOM BEZ MEĐUPROSTORU ...

  • Using gravity data to define structural correlation affecting the formation of Neogene basins

    Snežana Ignjatović, Ivana Vasiljević, Branisav Sretković, Milanka Negovanović (2023)
    A gravity survey can help to define the structural correlation in the study area. The structures that have influenced the development of Neogene basins can be defined using gravity data. By applying mathematical transformations to gravity data, the geological structures (faults, nappes, etc.) that impacted the formation of Neogene basins can be defined. We have taken the part of the Dinarides as the test region. The paper presents the results obtained using the procedure residual, vertical gradient, and total ...
    gravity survey, mathematical transformation, basin

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија
    ...  has shown that oil and gas reservoirs are developed in  404  turbidites  of  the Majdan  Formation  deposited  at  the  bottom  of  the  Pannonian  Lake.  Hydrocarbons  accumulated  in the Mokrin field reservoirs are generated  in hemipelagic marls of the Hetin Formation  deposited in the Banat ...
    ...  Kikinda Formation sediments are deposited in shallow‐water environments and are  recognized by progradation and aggradation series (Figure 1a and 1b). Kikinda Formation sediments are  sealed by the Paludina Formation represented by fluvial sediments.   Hemipelagic marls of the Hetin Formation are re ...
    ... dite sandstones, clay and marl. Turbidite sandstones are always depo‐ sited over the Hetin Formation marls, while they are, in turn, always sealed by sediments of the Mokrin  Formation slope. Mokrin Formation is deposited on the slope, and almost across the entire exploration  area  it  is  represented  ...

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... the lower part of the Ljubiš Formation has a Middle Jurassic, ?Bajo­ cian to Bathonian age. 4. DISCUSSION The Ljubiš Formation was proposed by GAWLICK et al. (2017) as a possible age equivalent of the Middle to Upper Jurassic (Ba­ thonian-Tithonian) Gonje Formation (VISHNEVSKAYA et al., 2009) developed ...
    ... (YAO), Hexasaturnalis suboblongus (YAO), H. tetraspinus (YAO). Taking into account previous data from the upper part of the Ljubiš Formation, the age of the formation can be estimated to be in the interval from the ?Bajocian to Bathonian-Oxfordian. The new biostratigraphic data clearly show the ...
    ... distal slope or basinal facies represented by cherty lime­ stones (the “Grivska Formation”, DIMITRIJEVIĆ & DIMI- TRIJEVIĆ, 1991) and a Late Triassic reefal and slope facies (DIMITRIJEVIĆ, 1997). Recently, all Grivska Formation occur­ rences are attributed to the allochthonous and far­travelled nappe with ...

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ...                                                                     LEGEND Diameter gas pipeline D>20’’ Diameter gas pipeline 10’’20’’ Diameter gas pipeline<10’’ Planed gas pipelines Gas pipeline PE Srbijagas Gas pipeline Yugorosgas Main measuring regulation station Input transmitter station Output ...
    ... requirements of natural gas. 3.2.1. Scenarios of infrastructure development Diversification of sources and directions of the natural gas supply, with establishing a domestic and regional natural gas market and providing the secure supply of natural gas are important goals in the natural gas sector of Republic ...
    ... of intensive consumption of natural gas. This HIGH consumption scenario is characterized by higher consumption of natural gas, mainly because of combined heat and power production gas usage in industrial plants as well as in new gas plants with a combined cycle. Gas plants should be very important in ...

  • Middle Jurassic terebratulide brachiopods from the Jordan Valley (northwestern Jordan)

    Howard R. Feldman, Barbara V. Radulović, Vladan J. Radulović, Fayez Ahmadc (2021)
    U radu je izvršena revizija i detaljan opis srednjojurskih brahiopoda Jordanske doline, a takodje su izdvojeni i novi taksoni. Sa profila Arda iz gornjeg bata (Hamam formacija) i donjeg keloveja (Muganija formacija) odredjeni su novi rod i vrsta Jordanithyris ardainensis. Iz gornjeg bata Hamam formacije (krečnjaci, dolomiti, peščari i laporci) izdvojena je vrsta Ptyctothyris quillyensis. Zajednica koju čine Arabatia bihinensis, Ectyphoria sinaiensis, Ptyctothyris quillyensis, Dorsoplicathyris dorsoplicata i Tubithyris jurayfahiensis potiče iz donjokelovejskih krečnjaka sa proslojcima laporaca Muganija formacije. Brahiopodi ...
    Brachiopoda, Terebratulida, severozapadni Jordan, srednja jura, gornji bat, donji kelovej