Претрага

Упит dcterms_subject_txt:upstream oil and gas

2395 items

  • Double traveling valve increases rod-pump efficiency

    Miloš Petrović, Bojan Martinović, Milica Ješić, Miroslav Crnogorac (2023)
    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.
    дубинска пумпа на клипним шипкама, производња нафте, ефикасност

  • Energetska bezbednost sektora prirodnog gasa Srbije

    Aleksandar Madžarević, Predrag Jovančić, Miroslav Crnogorac (2023)
    U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gasom domaćeg tržišta bio je jedan od prioriteta razvoja energetike Srbije. Istovremeno, aspekt sigurnog snabdevanja bio je neizostavni deo slagalice stvaranja energetske bezbednosti. Izražena uvozna zavisnost je dominantna karakteristika sektora prirodnog gasa, tačnije, Republika Srbija je snažno zavisna od ruskog gasa, sa više od 80% uvezenih količina gasa, a do pre dve godine snabdevala se isključivo kroz jednu interkonekciju. U radu se razmatra aktuelna situacija u sektoru prirodnog ...
    N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja
    ... natural gas sector, more precisely, the Republic of Serbia is strongly dependent on Russian gas, with more than 80% of imported gas volumes, and until two years ago, it was exclusively ' supplied throw one interconection. The paper discusses the current situation in the natural gas sector, ...
    ... graduated, completed his master's studies, and received his doctorate in the scientific field of oil mining, mechanization, and automation in mining, at the Faculty of Mining and Geology, University of Belgrade, where he was first elected to the position in 2014. He is the author of many papers ...
    ... periods and the potential trend of assessing the security of natural gas supply to Serbia, as well as its vulnerability to interruptions in international supply chains. Through the paper, an analysis of the energy security of the natural gas sector assessed by the N-1 index, IDUPS and the parameter ...

  • Applicability of calculated vitrininte reflectance for maturity assessment of organic matter of source rocks from hyperthermal basin (Banat Depression, Serbia)

    Stojanović Ksenija, Kostić Aleksandar, Mrkić Sanja (2012)

  • Remontni radovi u bušotini sa dubinskom pumpom

    Jovana Milošević (2024)
    Remontni i stimulativni radovi u naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku zonu.U prvom slučaju remontni i stimulativni radovi kod proizvodnih bušotina služe za otklanjanje problema i povećavanje proizvodnje bušotine. Dok u drugom slučaju, kod potencijalnih bušotina su ovi radovi namenjeni završnim obradama ...
    remontni radovi, hemijska obrada, Gravel Pack, alat za instrumentaciju, puške za perforaciju
    ... AONG: https://www.arab-oil- naturalgas.com/perforating-oil-and-gas-wells/ Perforating Oil and Gas Wells. (2020). PETROBLOGWEB. (2016). Preuzeto sa PETROLEUM ENGINEERING, SAND PRODUCTION: https://petroblogweb.wordpress.com/2016/09/03/overview-of-standalone-screensliner- sand-exclusion-options/ ...
    ... perforation technology: Status and prospects. (2014). Preuzeto sa ResearchGate: https://www.researchgate.net/publication/270914514_Oil_well_perforation_technology_St atus_and_prospects PAŠIĆ, D. D. TEHNIKA IZRADE BUŠOTINA 1, BUŠAĆA POSTROJENJA. Perforating Oil and Gas Wells. (n.d.). Preuzeto sa AONG: ...
    ... 2020) Tipovi puška za napucavaje: • Mlazna puška • Puška s mecima • Hidraulični mlazni perforator • Mehanički perforator (Perforating Oil and Gas Wells, 2020) 14 Konvencionalni način napucavanja vrši se primenom eeksplozivnih kumulativnih punjenja i pušaka sa mecima. Konvencionalni način ...

  • 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

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • Available technological procedures for capturing CO2 in the industrial and power generation sectors

    Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac (2021)
    Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...
    capturing CO2, power plants, CO2 capture systems, CO2 technologies
    ... gasified to produce a gas mainly composed of carbon monoxide (CO) and hydrogen (H2), which is known as a synthesis gas or syngas. The produced syngas is mixed with steam in a catalytic reactor, which promote reaction between CO and water, producing hydrogen and CO2-rich gas mixture and increase mole co ...
    ... in a solvents, and it is mainly applied for capturing CO2 in pre-combustion systems [20-21]. CO2 solubility depends on presure and temperature, and it will increase with the increase of pressure and decrease of temperature. This procedure has many applications such as: in natural gas processing, in ...
    ... natural gas processing and oxygen separation from nitrogen in an oxy-fuel combustion system [21]. 3.4. Cryogenic distillation Cryogenic distillation takes place at low temperatures to provide separation, condensation and purification od CO2 from flue gas stream [4,11]. Therefore, the gas mixture ...

  • Analiza softvera za projektovanje ESP sistema

    Aleksandar Sredojević (2024)
    U momentu kada pritisak na dnu bušotine nije dovoljan da savlada ukupne gubitke pritisaka od dna bušotine do separatora, proizvodnja pomoću ležišne energije nije više moguća i bušotina prestaje sa eruptivnim radom. Kako bi ponovo omogućili proizvodnju fluida iz bušotine, potrebno je primeniti neke od mehaničkih metoda eksploatacije. Najprimenljivije mehaničke metode eksploatacije su: gas lift (GL), dubinske pumpe sa klipnim šipkama (SRP), električne uronjene centrifugalne pumpe (ESP), zavojne pumpe (PCP) i hidraulične pumpe (HP). Jadna od tih metoda koja ...
    električna centrifugalna pumpa (ESP), proizvodnja fluida, mehaničke metode eksploatacije, Prosper, Pipesim
    ... Artificial Lift Research and Development Counci! (ALRDC), URL: www.alrdc.com (18.08.2024.); Baker Hughes, (1997). „Submersible Pump Handbook Sixth Edition“, Centrilift, Claremore, Oklahoma; Breit, S., Ferrier N., (2008). „Electrical Submersible Pumps in the Oil and Gas Industry - Using ESP systems ...
    ... Operations, and Maintenance Second edition“; H. Stel, T. Sirino, F.J. Ponce, S. Chiva, R.E.M. Morales, (2015). „Journal of Petroleum Science and Engineering“ 136 (2015) 41—54; Hisham, B., M., Aman, A., (2017). „Investigate a Gas Well Performance Using Nodal Analysis“; Hofstatter, H., (2018). Oil and ...
    ... and Gas Production Principls: 9th Lecture: Vertical Lift Performancee (VLP); L, Fetoui, „Productio Technology, ESP design — Step 6: Optimum Size of Compounds“, URL: Productio Technology, ESP design (30.08.2024.); Jan Dirk Jansen, (2017). „Nodal Analysis of Oil and Gas Production Systems“, Society ...

  • Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells

    Bojan Martinovic, Marija Živković, Branko Grubač (2021)
    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 ...
    prenos toplote konvekcijom, ESP pumpa, svojstva fluida, problemi u radu bušotine

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... the beginning ofthis century, when the prices of oil fuels were high, diesel fuel has been manufactured from coal. The cost of such generated diesel fuel was about 928 per barrel, which included entire production process from coal, to gas and the oil at the end. Twenty years ago the UCG process was ...
    ... bar and — capacity up to 4000 mš of gas/h. And for the gas parameters are: — quantity of produced gas up to 100000 mž of gas/h, — gas pressure 0.2 bar, and — gas temperature 200-400 *C. Air, Oxygen, Steam CO,CO, H„ CH, |- —— Oxidation zone. —— j- Reduction zone +| -- Drying and Pyrolysis ...
    ... solid fuel at normal pressure, obtained is a gas or gas mix- ture that consists of CO, CO», and H», and at elevated pressures and temperatures (in particular with the current UCG systems), CH, is also present. Generated gas mixture is similar to natural gas. If a vapor-oxygen mixture is used as a ...

  • Избор одговарајуће механичке методе

    Анастасија Мирјанић (2024)
    Експлоатација нафте и гаса кључна је за задовољење глобалних енергетских потреба. Различите методе се користе за ефикасно вађење тих природних ресурса из земљe. Механичке методе експлоатације, које укључују различите врсте пумпи и компресора, играју значајну улогу у овом процесу. У нафтној индустрији, ефикасно вађење нафте и гаса зависи од избора одговарајуће технологије пумпања. Две од најраспрострањенијих технологија су дубинске пумпе са клипним шипкама (енгл. Sucker rod pumps- SRP) и електричне потапајуће пумпе (енгл. Electrical submersible pump- ESP). Овај завршни рад ће ...
    дубинске пумпе са клипним шипкама, замена, електрична потапајућа пумпа, производња, бушотина

  • Uticaj utiskivanja gas-lift gasa na prenos mase i toplote

    Branko Grubač (2019)
    Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... increase of liquified petroleum gas, LPG, yield was observed after continuous gas-lift start up in the gas processing plant as one of the final products obtained from gas condensate and associated gas from oil wells. It was assumed that the presence of gas-lift gas leads to the establishment of a ...
    ... Doktorska disertacija Uticaj utiskivanja gas-lift gasa na prenos mase i toplote Branko Grubač 149 [53] F. Poettman, P. Carpenter, The multiphase flow of gas, oil and water through vertical flow strings, Drilling and Production Practice, A.P.I., str 257-317, (1952) ...
    ... for gas - liquid pipe flow via slug dynamics-part 2: model validation, Journal of Energy Resources Technology, Vol. 125, str 1-24, (2003) [77] H. Zhang, C. Sarica, Unified modeling of gas/oil/water – pipe flow – basic approaches and preliminary validation, Journal of Petroleum Science and E ...

  • Енергетска безбедност Европске уније у светлу актуелне енергетске транзиције

    Бобан Павловић, Дејан Ивезић (2021)
    Енергетска стратегија Европске уније, која од 2015. године обухвата и циљеве у области климатских промена, тежи изградњи „енергетске уније” која потрошачима из ЕУ даје сигурну, приступачну, чисту и одрживу енергију. Енергетска политика ЕУ поставља пред себе амбициозне циљеве у погледу коришћења обновљивих извора – учешће од 32% до 2030. године. Овако опсежну и динамичну енергетску транзицију у Европи усложњава хетерогеност националних енергетских система у погледу структуре енергетског микса, нивоа увозне зависности, као и нивоа технолошког, друштвеног и економског ...
    енергетска безбедност, Европска унија, енергетски показатељи, природни гас, обновљиви извори енергије
    ... Azerbaijan starts gas exports to European market via TAP, 2020, https://www.dailysabah.com/business/energy/azerbaijan-starts- gas-exports-to-european-market-via-tap. 44. Elbassoussy, A., “European energy security dilemma: major challenges and confrontation strategies”, Review of Economics and Political ...
    ... 47. Eurostat, Oil stocks − emergency stocks in days equivalent − monthly data, Eurostat, 2019. https://ec.europa.eu/eurostat/web/products- datasets/-/nrg_143m. 48. Република Србија, Уредба о утврђивању Превентивног акционог плана ради обезбеђивања сигурности снабдевања природним гасом, Службени ...
    ... Energy Agency, A long-term view of natural gas security in the European Union, IEA, Paris, 2019, https://www.iea.org/commentaries/a-long-term-view-of-natural-gas- security-in-the-european-union. 42. Hadjiyski, L., “Pipeline Politics: Europe, Russia, and Energy”, European Horizons, 2018, htt ...

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • 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
    ... Mathe- matical and Natural Sciences, 33: 633 pp. MILANKovIć, M. 1952. Uspomene, doživljaji i saznanja[Mem- ories, experiences and cognition]. zavod za udžbenike, 977 pp. NASIRIToUSI, N. 2017. Fossil Fuel Emitters and Climate Change: Unpacking the Governance Activities of Large oil and Gas Companies ...
    ... recent years, climate changes have been a heated debate both, in the media and scientific cir- cles. People have become aware of its influence on the increased emission of carbon dioxide and tem- perature rise. As a result, many oil and other large manufacturing companies came under the public at- A hundred ...
    ... caused by greenhouse gas accumulation during PETM and technogenic activities (SinClAir, 2011). GINGERICH, P. D. 2019. Temporal Scaling of Carbon Emission and Accumulation Rates: Modern Anthropogenic Emis- sions Compared to Estimates of PETM-onset Accumu- lation. Paleoceanography and Paleoclimatology ...

  • Numeričko modelovanje povećanja iskorišćenja naftnih ležišta injektiranjem polimera i analiza osetljivosti parametara

    Jana Šujica (2024)
    U toku proizvodnje jednog ležišta, nakon primene sekundarnih metoda iskorišćenja, velika količina nafte ostaje zarobljena u ležištu. Ovaj “problem” rešava se upotrebom tercijarnih metoda iskorišćenja.Tercijarne metode mogu se podeliti na: hemijske, termičke, mikrobiološke i metode utiskivanja gasova u uslovima mešanja i nemešanja.U ovom radu analiziraju se hemijske metode koje se odnose na injektiranje polimera u cilju povećanja iskorišćenja naftnog ležišta “X”. Simulacija je rađena u simulatoru “Tnavigator” na sintetičkom modelu u cilju definisanja stepena iskorišćenja naftnog ležišta “X” nakon ...
    povećanje iskorišćenja, utiskivanje polimera, numerička simulacija
    ... simuliraju: na: modele tipa “black oil” (takozvani B modeli), kompozicione, termičke i hemijske. “Black oil” modeli se najčešće koriste za simuliranje izotermnog, simultanog protoka nafte, vode i gasa usled viskoznih, gravitacionih i kapilarnih sila. “Black oil” termin se koristi Jer model podrazumeva ...
    ... podrškom energije ležišta, sekundarne metode odnose se na injektiranje vode ıi gasova. Pored sekundarnih metoda u takozvane dopunske metode spadaju i tercijarne metode koje se Jedinstveno zovu EOR metode (eng. Enhanced Oil Recovery). Ove metode se mogu klasifikovati u nekoliko kategorija čiji broj ...
    ... tike simulacionog modela dimenzije modela 80x65x15 broj ćelija 78 000 poroznost 25% prisutne faze nafta, rastvoreni gas i voda broj bušotina 7 tip modela black oil početak simulacije 01.01.2015. Format ECLIPSE 23 Na slici 3.1.3. je dat prikaz modela naftnog ležišta “X”. Slika 3 ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... es, their further degradation into gas is favoured. The yield of gas obtained by co-pyrolysis of lignite/HDPE is obviously higher than the yield of gas obtained by pyrolysis of HDPE at 400, 450, and 500 ◦C, whereas it is opposite at 550 and 600 ◦C. The yield of gas is lower in the co-pyrolysis experiment ...
    ... S8a) indicates that the produced gas mainly consists of water vapour (O–H stretching peaks around 3700 cm−1 and O–H bending peaks from 1400 to 1700 cm−1), CO2 (peaks between 2300 cm−1 and 2400 cm−1 corresponding to C=O stretching), and CO (peaks between 2100 cm−1 and 2200 cm−1 representing C–O stretching) ...
    ... thermograms of pure lignite and pure HDPE, with prevalence of CO2 and CO (Figure 5 and Figure S8c). The obtained results suggest that the presence of HDPE Polymers 2021, 13, 759 21 of 25 can significantly improve the quality of the gas composition in comparison with gas produced from lignite alone ...

  • Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)

    Dejan Radivojević, Ljupko Rundić (2017)
    ... (2008): Origin of oils in the Velebit oil‐gas ºeld, SE Pannonian Basin, Serbia – Source rocks characterization based on biological marker distributions, Organic Geochem., 39/1, 118–134. MODELING OF ECOLOGICAL CONDITIONS IN THE EUXIN BASIN IN THE LATE SARMATIAN AND MAEOTIAN BY METHODS OF DIATOM ANALYSIS ...
    ... LJ. (2016): Synrift and postrift Miocene sediments of northern Banat, Ser- bia, Underground Mining Engineering, 28, 39–60. STOJANOVIĆ, K., JOVANČIĆEVIĆ, B., VITOROVIĆ, D., GOLOVKO, Y., PEVNEVA, G. & GOLOVKO, A. (2007): Evaluation of saturated and aromatic hydrocarbons oil–oil maturity correlation ...
    ... less present then Badenian one and could be found in a very limited area. Generally, these sediments are very thin and represented with siliciclastics and limestones. °e Pannonian, Pontian, Pliocene and Quaternary sediments belong to postrift stage in the broader sense and lays unconformably over the ...

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... coal, then heavy oil and at the end natural gas. Such an approach and order of substitution is governed by the need for maximiz- ing the reduction of GHG emission and air pollution in the cities. For the projection of the future state of district heat- ing systems, the heating area and efficiency of the ...
    ... efficient technology with the same effi- ciency for consumers and level of comfort, • Reduction of carbon dioxide emission of 6.5% per year by introducing this alternative renewable energy source and substitution of coal, heavy fuel oil, and natural gas, • Reduction of import dependency of DH systems for ...
    ... highest share, natural gas, is domi- nantly an imported energy source. Import is performed through a single import route from Russia via Ukraine (Madžarević et  al. 2018). The second most used fuel, heavy oil, is produced in the country, but mainly from imported oil. Only coal and wood fuel can be considered ...

  • Efficiency and lifetime of medium voltage transformers

    Snežana Aleksandrović, Vesna Damnjanović (2017)