Претрага
21 items
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Analysis and visualization of geophysical well-logging data from closely spaced boreholes
Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov. "Analysis and visualization of geophysical well-logging data from closely spaced boreholes" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)
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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 стратиграфијаSaša Ivanišević, Dejan Radivojević. "New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Application of Gel for Water Shutoff: A Case Study of Kelebija Oil Field
This paper focuses on the results of water shutoff operations using DSGA polymer gel in the Kelebija oil field. The methodology of candidate wells selection and the manner of performing the operation will also be included. The Kelebija oil field is characterized by a complex reservoir system with heterogeneous layers of different permeability and dual porosity, which led to the early breakthrough of water. For the last 25 years, average water cut was above 90%. Implementation of water shutoff ...intervención de pozos petroleros, reservoir characterization, production control, well logging, downhole intervention, enhanced recovery, complex reservoir, reservoir surveillance, water shut-off, upstream oil & gasIrina Zahirovic, Petar Skrobonja, Dušan Danilović. "Application of Gel for Water Shutoff: A Case Study of Kelebija Oil Field" in SPE Production & Operations, SPE (2022). https://doi.org/10.2118/209590-PA
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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
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 InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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Well completion of suspended and abandoned wells for the production of thermal and electrical energy
Marija Ilic, Dušan Danilović, Miroslav Crnogorac, Vesna Karović-Maričić, Lola Tomić, Anastasija Mirjanić (2024)opremanje bušotina, konzervirana bušotina, likvidirana bušotina, toplotna energija, električna energijaMarija Ilic, Dušan Danilović, Miroslav Crnogorac, Vesna Karović-Maričić, Lola Tomić, Anastasija Mirjanić. "Well completion of suspended and abandoned wells for the production of thermal and electrical energy" in Underground mining engineering, Belgrade : Faculty of Mining and Geology (2024)
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Challenges and Insights: Sequence Stratigraphy of Pannonian Coals in the Drmno Depression, Serbia
The application of sequence stratigraphy on coal beds worldwide has significantly contributed to the under¬standing of coal deposits and their origin. On the southeastern edge of the Serbian part of the Panno¬nian basin, there is a system of peri-Pannonian basins characterized by the appearance of Upper Miocene coal seams in the siliciclastic fill, which provides an ex¬cellent opportunity for testing sequence stratigraphy in young coal basins. In this study, sequence stratigraphy was applied to coals in the Drmno Depression, ...Anastasia Ninić, Dragana Životić, Dejan Radivojević. "Challenges and Insights: Sequence Stratigraphy of Pannonian Coals in the Drmno Depression, Serbia" in 10th International workshop Neogene of Central and South-Eastern Europe, Podčetrtek, Slovenia, May 27 to 31 , 2024, Geological Survey of Slovenia (2024)
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Design and drilling of wells in formations with high pressure
Vojin Solomun (2024)Objectives of this Thesis are to: - Develop an awareness of the challenges presented from elevated temperatures and pressures in well construction. - Learn the key differences between ―normal‖ condition wells and HPHT wells. - Understand some of the indicators of thermal- and pressure-related problems. - Understand the responses which may be made to mitigate high pressure and high temperature ,,HPHT‘‘ challenges while drilling wells. HPHT wells are an unavoidable consequence of the ever expanding search for oil and gas resources around the world. As wells are ...Vojin Solomun. Design and drilling of wells in formations with high pressure, 2024
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Application of machine learning for diagnosing the operation of a deep well pump in oil production
Maja Trikić (2024)This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoostMaja Trikić. Application of machine learning for diagnosing the operation of a deep well pump in oil production, 2024
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Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia
We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić. "Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia" in Acta Geophysica, Springer (2019). https://doi.org/10.1007/s11600-019-00328-9
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Gas-lift wells optimization at the oil field "K"
Dušan Danilović, Marija Ilić, Miroslav Crnogorac, Lola Tomić. "Gas-lift wells optimization at the oil field "K"" in Podzemni radovi, University of Belgrade - Faculty of Mining and Geology (2022). https://doi.org/10.5937/podrad2241031D
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Оцјена водопропусности понорске зоне Шуковићу (Цернићко поље) помоћу Лижоновог теста
One of the specificities of reservoirs forming in highly karstified terrains is reflected in the wide range of unknowns, specifically during reservoir formation, filling and operation. Unfortunately, despite complex research, many reservoirs constructed in karst terrains have problems with water losses from the reservoir to other aquifers due to ponor and ponor zones which are a common in the karst of Eastern Herzegovina. One of such zones is Šuković ponor located in the southern part of the Cerničko polje ...Петар Војновић, Саша Милановић, Љиљана Васић. "Оцјена водопропусности понорске зоне Шуковићу (Цернићко поље) помоћу Лижоновог теста " in Мултидисциплинарна конференција “Kарст 2022 - Значај, стање и перспективе коришћења и заштите ресурса у карсту", Српска академија наука и уметности (2022)
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Razvoj modela upravljanja cirkulacijom u postupku bušenja korišćenjem neuro fazi sistema zaključivanja
Seyed Ali S. Razeghi (2022)Gubitak isplake predstavlja nekontrolisano isticanje bušaćeg fluida kroz formacije kao što su kaverne, pukotine, ili drugi slojevi. Tradicionalne metode procene gubitka isplake se zasnivaju na primeni seizmičkih podataka ili pronalasku „mesta“ gubitka isplake na osnovu raspoloživih podataka iz susednih bušotina. Međutim, ove metode procene nisu pouzdane.‘ U disertaciji je izvršena analiza i procena uticaja parametara bušenja, geoloških faktora, karakteristika formacije i fluida na gubitak isplake kao i na formiranje fraktura u formacijama. Uspostavljeni su modeli koji podrazumevaju proces obrade ...Seyed Ali S. Razeghi. Razvoj modela upravljanja cirkulacijom u postupku bušenja korišćenjem neuro fazi sistema zaključivanja, Beograd : [S. Razeghi], 2022
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Density maps from gravity inversion as a tool for the basin basement analysis and imaging
Ivana Vasiljević (2023)Previously devised method for density mapping of the Cenozoic basin’s basement is further developed in order to improve the visualization and geological interpretation of the results. The method combines gravity-density inversion with forward modeling and requires gravity anomaly and depth-to-basement data. Although it was primarily designed for application in well-researched basins, such as Pannonian basin, method does not require further constrains. An information on density distribution in the Cenozoic sediments (from density logging or core density measurements) is important ...Ivana Vasiljević. "Density maps from gravity inversion as a tool for the basin basement analysis and imaging" in GEOSCIENCE 2023, Bucharest, Romania, November 9-11, 2023., Bucharest : SGAR - Romanian Society of Applied Geophysics (2023)
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Depth geological relations of the wider area of Belgrade - based on the wells and geophysical data
Đorđe Marinović, Ljupko Rundić (2020)Предметна референца обухвата простор шире околине Београда укупне површине око 2.000 km2. Аутори су објединили капиталне геолошке и геофизичке податке обезбеђене површинским истраживањима и мултидисциплинарним елементима из 52 бушотинe са дубинама између 33 и 2.733 m. Конкретни палеонтолошки налази специјализованих аналитичара са детерминацијом макро и микрофауне и флоре, презентовани су како из неогених формација тако и из басенске подине. Осим конвенционалних петролошких описа стена цитиране су и микроскопске детерминације интрузивних и екструзивних магматита. Из затвореног басенског простора корелативно су ...Đorđe Marinović, Ljupko Rundić. "Depth geological relations of the wider area of Belgrade - based on the wells and geophysical data" in Annales geologiques de la Peninsule balkanique, National Library of Serbia (2020). https://doi.org/10.2298/GABP201030009M
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Development and evaluation of fracture gradient curve model: a case study of south-central Kazakhstan
An accurate fracture gradient value is one of the most important issues in oil and gas well design and drilling. The value of a fracture gradient is a critical parameter for determining the drilling mud weight and selecting the proper depths for setting the casing in the planning process of drilling operations. This paper proposed the new curve model of fracture gradient for the south-central Kazakhstan (central Asia) region based on the analysis of leak-off test and format integrity ...Branimir Stanisavljevic, Vesna Karovic Maricic, Irena Isakov. "Development and evaluation of fracture gradient curve model: a case study of south-central Kazakhstan" in International Journal of Oil, Gas and Coal Technology, Inderscience Publishers (2022). https://doi.org/10.1504/IJOGCT.2023.128042
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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 ...Branko Grubač. Uticaj utiskivanja gas-lift gasa na prenos mase i toplote, Beograd : Rudarsko-geološki fakultet, 2019
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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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Pregled hidrodinamičkih istraživanja bunara sa horizontalnim drenovima numeričkim metodama
U radu je predstavljen pregled odabranih hidrodinamičkih istraživanja realizovanih primenom numeričkih metoda simulacije kretanja podzemnih voda pod uticajem rada bunara sa horizontalnim drenovima. Na osnovu pristupa u matematičkom i hidrauličkom tretiranju, kao i numeričkoj simulaciji bunara sa horizontalnim drenovima na modelima, predstavljeni su najznačajniji aspekti izrade hidrodinamičkih modela ovog kompleksnog tipa vodozahvatnog objekta. Metodologija obuhvata izbor: a) graničnih uslova za simulaciju prirodnih granica, izvora prihranjivanja i dreniranja izdani; b) primenjivanog stepena diskretizacije prostora obuhvaćenog modelom u planu i profilu; ...horizontalni bunari, hidraulika bunara, analitički modeli, numerički modeli, hidrodinamičko modeliranje podzemnih vodaĐorđije Božović, Dušan Polomčić, Dragoljub Bajić. "Pregled hidrodinamičkih istraživanja bunara sa horizontalnim drenovima numeričkim metodama" in Vodoprivreda, Srpsko društvo za odvodnjavanje i navodnjavanje (2020)
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Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva
Ljiljana M. Vasić (2017-07-14)postupaka koji je primenjen u cilju definisanja zona prihranjivanja i veze izmeđupodzemnih i površinskih voda, vremena koje voda provede u podzemlju, pri čemu seformira jedinstven hemijski sastav i temperaturni režim isteklih voda, bili su polaznaosnova za usmerenje na istraživanje karsta i definisanje teme doktorske disertacije.Kučajsko-beljanički masiv se nalazi u istočnoj Srbiji i pripada oblasti Karpatobalkanskogluka i idealan je poligon za istraživanje, obzirom da se u okviru njega nalazejaka karstna vrela i pojave toplih karstnih izvora na relativno malom rastojanju, ...karstni sistemi, geneza podzemnih voda, izotopske metode, starost voda,hidrogeohemijski procesi, dubina cirkulacije podzemnih voda, subtermalne i termalnevodeLjiljana M. Vasić. "Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-07-14)
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Старење бунара у алувијалним срединама различитог степена оксичности
Brankica Majkić (2013-09-27)Старење бунара настаје као последица процеса корозије и колмирања. Процесекорозије могуће је спречити уградњом филтерских конструкција од материјалаотпорних на корозију. Колмирање може да настане без обзира на врсту материјалаод кога се праве бунарске конструкције, а процесом може бити захваћенаприфилтарска зона па и зона саме водоносне средине. Из тог разлога тезa јеусмеренa на процесе који доводе до колмирања бунара и последицe опадањaкапацитета водозахватних објеката. Полазна хипотеза је да бунари стареразличитом брзином у срединама различитог степена оксичности. Хидрохемијскеи микробиолошке карактеристике подземних ...старење бунара, алувијалне издани, степен оксичности средине,колмирање, бунарски талог, локални хидраулички губитак, дозвољене улазнебрзинеBrankica Majkić. "Старење бунара у алувијалним срединама различитог степена оксичности" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-09-27)