Претрага
374 items
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Lowest possible flow temp. offers savings vs. pour point
Danilović Dušan, Karović-Maričić Vesna, Ivezić Dejan, Batalović Veselin, Živković Marija, Crnogorac Miroslav (2013)Danilović Dušan, Karović-Maričić Vesna, Ivezić Dejan, Batalović Veselin, Živković Marija, Crnogorac Miroslav. "Lowest possible flow temp. offers savings vs. pour point" in Oil & Gas Journal 111 no. 8, Houston:PennWell Corp (2013): 86-90. https://doi.org/10.1016/j.energy.2014.02.017
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Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)
This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...... history of sedi- mentary basins, maturation indices, and kinetics of oil and gas generation. AAPG Bulletin, 71: 1445–1466. Tissot, B. P. & Welte, D. H., 1978. Petroleum Formation and Occurrence: A New Approach to Oil and Gas Exploration. Springer-Verlag, Berlin, 538 pp. Van Gijzel, P., 1981. Char ...
... history of sedi- mentary basins, maturation indices, and kinetics of oil and gas generation. AAPG Bulletin, 71: 1445-1466. Tissot, B. PR & Welte, D. H., 1978. Petroleum Formation and Occurrence: A New Approach to Oil and Gas Exploration. Springer-Verlag, Berlin, 538 pp. Van Gijzel, P., 1981. Charac ...
... n risk in the area, in terms of the petroleum sys- tem, is uncertainty about the existence of e�cient seals. �ere has been no drilling for oil and gas so far, but there is a well-known bitumen seep east of Ljubinje (Mišljen, Fig. 1C – on the le� border) in the Cretaceous limestone. �e Mišljen ...Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić. "Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)" in Annales Societatis Geologorum Poloniae (2021). https://doi.org/10.14241/asgp.2021.16
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P-T analiza uglja RB Kolubara
Rada Vitomir (2024)Rudarski basen Kolubara predstavlja jedno od najvažnijih ležišta lignita u Republici Srbiji i ključni je faktor u snabdevanju zemlje energijom. Kvalitet uglja iz ovog basena direktno utiče na efikasnost termoelektrana i zadovoljenje energetskih potreba. U ovom radu, opisan je značaj tehničke i elementarne analiza uglja kako bi se utvrdili fizičko-hemijski parametri uglja iz Rudarskog basena Kolubara. U drugom delu rada dat je opis P-T analize uglja i njen značaj za ocenu mogućnosti čišćenja uglja. Takođe, dati su i rezultati ...... Istraživanje ranga uticaja prirodno-geoloških uslova na izbor sistema podzemnog otkopavanja ugljenih slojeva u Srbiji. Rudarski radovi, Bor, 49-60. . Kisić, D. M., Miletić, S. R., Radonjić, V. D., Radanović, S. B., Filipović, J. Z., & Gržetić, L. A. (2013). Prirodna radioaktivnost uglja i letećeg ...
... veću ekonomsku vrednost. U isparljive materije (volatili) ulaze pare ı gasovi koji se izdvajaju pri termičkim razlaganju uglja, a to su: vodena para, ugljen monoksid, ugljen dioksid, vodonik, ugljovodonici, sumporni gasovi, kiseonik, amonijak itd. Sadržaj isparljivih materijala izračunava se na ...
... ukupne vlage dostiže u trestu 90%, u mrkim ugljevima do 60%, kamenim ugljevima i antracitu 3-15%. Deo ukupne vlage koji se izdvaja iz uglja prirodnim isparavanjem predstavlja grubu ili jamsku vlagu, a preostali deo vlage koji se iz uglja izdvaja sušenjem na temperaturi od 100-110%C higroskopnu ...Rada Vitomir. P-T analiza uglja RB Kolubara, 2024
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Thermal evolution of the organic matter and oil generation in the Serbian part of the Pannonian Basin.
Stojanović Ksenija, Kostić Aleksandar, Nytoft Hans Peter, Stojadinović Sanja. "Thermal evolution of the organic matter and oil generation in the Serbian part of the Pannonian Basin." in 9th International Conference “Oil and Gas Chemistry”, Tomsk, Russia, September 22-25, 2015., Tomsk, Russia:IOA of the Siberian Branch of the Russian Academy of Sciences and Institute of Petroleum Chemistry, Russian Academy of Sciences, Tomsk. (2015): 116-121
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Praktikum iz Tehnologije materijala
Suzana Lutovac, Miloš Gligorić, Luka Crnogorac. Praktikum iz Tehnologije materijala, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2023
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Техничка дијагностика
Предраг Јованчић (2020)Предраг Јованчић. Техничка дијагностика, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2020
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Double traveling valve increases rod-pump efficiency
Traditional sucker rod pumps (SRP) use a single traveling valve, but recent double traveling valve innovations have improved SRP performance and efficiency in field applications with double traveling valves installed in pumps with top mechanical seating. The valves sealed better and produced similar fluid volumes compared with the previous single-valve pumps. They also enabled a reduction in pump diameter and optimized usage of surface equipment. Overall, the double travel valve SRPs produced stable production rates and annual production targets.Miloš Petrović, Bojan Martinović, Milica Ješić, Miroslav Crnogorac. "Double traveling valve increases rod-pump efficiency" in Oil & Gas Journal (2023)
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Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US
Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...... consumption of electricity. Total global energy-related greenhouse gas emissions rise by about 1% to a record high of 41.3 Gt CO»>eq. CO» emissions from energy-burning plants and the industrial sector accounted for 89% of greenhouse gas emissions in 2022. In particular, the global emission of carbon ...
... Emissions in the electricity and heat generation sector increased by 1.8% (i.e., 261 Mt), reaching the highest level of 14.6 Gt. The shift from gas to coal in many regions was the main driver of this growth: CO> emissions from coal-fired power generation increased by 2.1%, led by increased Asian ...
... operation per year). 5. Literature [1] Madžarević, A., Ivezić, D., Živković, M., Tanasıijević, M., Ivić, M., Assessment of vulnerability of natural gas supply in Serbia: State and perspective, Energy Policy, Volume 121, 2018, pp. 415-425 [2] IKA, CO> Emissions in 2021 and 2022, IEA Publications, ...Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić. "Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US" in International Conference on Global Energy and Climate Change - ICGRECC-23, New York, 2023, Research Galery- Science Leagues (2023)
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Analysis of the exhaust emissions inventory from auxiliary mining machines
Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović. "Analysis of the exhaust emissions inventory from auxiliary mining machines" in 9th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology (2023)
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Managing mining project documentation using human language technology
Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentationAleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja . "Managing mining project documentation using human language technology" in The Electronic Library (2018). https://doi.org/10.1108/EL-11-2017-0239
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Хидрогеолошки услови формирања угљокиселих минералних вода Србије
Goran H. Marinković (2014-06-17)Докторском дисертацијом разматране су хидрогеолошке структуре угљокиселихминералних вода литосфере Србије. При истраживањима узети су у обзир:резултати испитивања старости, порекла и физичко – хемијских карактеристикаугљокиселих вода, геотемпературни услови и геотектонска грађа литосфере,резултати изотопских испитивања на δ13С у карбонатима хидротермалнихлежишта, резултати истраживања минималних температура трансформацијекарбоната и структурно - хидрогеолошки услови у областима дренирањаугљокиселих вода.Резултати показују да је угљеник угљокиселих вода пореклом из карбонатахидротермалне фазе младих магматских процеса, а да су матични супстратиовог елемента карбонати мезозојских и палеозојских седиментних иметаморфних стена. Угљендиоксид ...литосфера Србије, угљокиселе воде, генеза, супстрати, рејони,хидрогеолошке структуре, дубина залегања, геолошки услови, типови,потенцијал.... супстрата угљеника (СО2). Угљокиселе минералне воде су природан ресурс, различитог квалитета и самим тим се разликује могућност њихове употребе. Формирање хидрогеолошки специфичних услова, угљокиселим водама даје угљендиоксид. Овај гас се генерише у литосфери кроз регионалне и контактно-метаморфне ...
... угљендиоксидом у угљокиселим водама се у подређеним количинама налазе и гасови: азот, сумпор-водоник, радон и други гасови (Не, Аr) који могу бити важни показатељи геохемијских услова њиховог формирања. Основни извори угљокиселог гаса у литосфери су масиви карбонатних и магматских стена, из којих се ...
... Зона веома успорених процеса водозамене теоретски залеже на дубинама већим од 1000 m. Природна брзина кретања подземних вода је веома мала (0,05 – 0,1 m/год). Практично нема услова за обнављање природних резерви подземних вода. Карактеришу је високе температуре и притисци. У њој се претпоставља ...Goran H. Marinković. "Хидрогеолошки услови формирања угљокиселих минералних вода Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-06-17)
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Multihazard Exposure Assessment on the Valjevo City Road Network
Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović. "Multihazard Exposure Assessment on the Valjevo City Road Network" in Spatial Modeling in GIS and R for Earth and Environmental Sciences, Elsevier Inc (2019). https://doi.org/10.1016/B978-0-12-815226-3.00031-4.
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Основе енергетике
Марија Живковић, Дејан Ивезић (2019)Марија Живковић, Дејан Ивезић. Основе енергетике, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2019
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Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin
Balázs Németh, Gábor Tari, Gábor Bada, Dejan Radivojević, Bruno Tomljenovic, Csaba Krézsek. "Introduction to special section: Characterization of hydrocarbon and geothermal resource potential and carbon sequestration opportunities of the Pannonian Basin" in Interpretation, AAPG SEG (2018). https://doi.org/10.1190/INT-2017-1207-SPSEINTRO.1
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A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)
Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenikaGordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević. "A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)" in Marine and Petroleum Geology, Elsevier BV (2021). https://doi.org/10.1016/j.marpetgeo.2021.105383
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Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)
Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu. "Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)" in Carbonates and Evaporites, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s13146-020-00550-3
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Развој модела за управљање рударском пројектном документацијом
Aleksandra Đ. TOMAŠEVIĆ (2018)rudarstvo, projektna dokumentacija, digitalna biblioteka, prirodno jezičke tehnologije, ekstrakcija podatakaAleksandra Đ. TOMAŠEVIĆ. Развој модела за управљање рударском пројектном документацијом, Beograd:Rudarsko Geološki Fakultet, 2018
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Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells
Electric submersible pumps (ESP) are applied in wells where additional energy is needed to ensure discharge of the fluid to the surface through the tubing. At the discharge side of the pump the fluid has bigger velocity, thus the pump induces a forced convection between the fluid and the tubing inner surface. Understanding of convective heat transfer in wellbores and analyses of influential parameters provides a possibility to optimise value of convective heat transfer coefficient in order to avoid ...Bojan Martinovic, Marija Živković, Branko Grubač. "Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells" in International Journal of Oil, Gas and Coal Technology, Inderscience Publishers (2021). https://doi.org/10.1504/IJOGCT.2021.10043281
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Osnovi hidrogeologije
Petar Dokmanović (2021)... agensi formiranja (prirodnog) kvaliteta PV, koji su navedeni u poglavlju 14, doprinose formiranju hemijskog sastava PV. Atmosferske padavine imaju nizak sadržaj rastvorenih mineralnih materija i gasova, u opsegu od nekoliko do nekoliko desetina mg/l. Antropogena emisija (gasova i čađi) i vulkanska ...
... izotopa radijuma, najčešće se javlja 228Ra, čiji su sadržaji u PV znatno niži od uranovih. Već pomenuti plemeniti gas radon je najzastupljeniji prirodni radionuklid u PV. To je nevidljiv gas, bez ukusa i mirisa, teži od vazduha. Javlja se u vidu tri izotopa, a preovlađujući je 222Rn, koji nastaje emanacijom ...
... mogu osetno da utiču na kvalitet PV primorskih izdani. Kada je prirodni kvalitet PV narušen antropogenim uticajem, govorimo o zagađenju PV. Formiranje kvaliteta PV počinje već u atmosferi, gde kišne kapi rastvaraju/apsorbuju gasove i čvrste materije, a nastavlja se po dospeću atmosferskih padavina ...Petar Dokmanović. Osnovi hidrogeologije, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2021
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Geotermalne karakteristike područja Semberije , Republika Srpska
Igor Glavaš (2024)Cilj završnog rada predstavlja, opis geotermalnih karakteristika područja Semberije, Republika Srpska, BiH.Rad se sastoji od opšteg dijela u kojem se navode osnovne karakteristike područja (geomorfološke, geografske, hidrološke,hidrometeorološke, geološke, tektonske i hidrogeološke) i specijalnog dijela koji detaljnije ulazi u tematiku osobina geotermalne energije i njihovih karakteristika u zadatom području kao i definisanje geotermalnog potencijala koje to područje ima.Sa prognoznim litološkim profilima 6 dubokih istražnih bušotina su izrađena 2 regionalna geološka, a njegovom konverzijom i hidrogeološka profila na osnovu kojih je, stečena ...... fosilna goriva su nastali prirodnim raspadanjem žŽživih organizama pod anaerobnim uslovima i praktično su neobnovljivi u ljudskom vijeku. Takvi energenti su: ugalj, nafta i njeni derivati, prirodni gas i nuklearna goriva, kao i njihove varijacije u porijeklu kao prirodne (za nuklearnu energiju isključivo ...
... et al. 2003. godine) Odnosi emisija CO2 u atmosferi tokom proizvodnje 1 kWh energije za različite izvore energije Ugalj 955 Nafta 893 Prirodni gas 599 Geotermalna 91 energija 0 100 200 300 400 500 60 700 800 900 1000 1100 g CO)y/kWh 4.2. Geotermalne osobine područja Semberija pripada ...
... sektora privrede od kojih je primarni jedini izdvojen kao bitan za odgovor na temu završnog rada. Primarni sektor — poljoprivreda - Povoljan prirodni položaj na obodu Panonske nizije i skoro potpuno ravničarski teren su omogućili razvoj poljoprivrede, pa je preovlađujući dio privrede zasnovan ...Igor Glavaš. Geotermalne karakteristike područja Semberije , Republika Srpska, 2024