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Упит dcterms_subject_txt:dewatering wells

118 items

  • 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
    ... technological process of UCG involves the preparation of a coal gasification layer and consists of drilling vertical wells or boreholes that follow the coal layer. Pipes are placed into wells up to the top ofthe coal layer, and the contact of the pipe with the surrounding area is cemented, while borehole ...
    ... useful gas, usually carried out in non-mined coal layers using injection of oxidants and steam. The product gas is transferred to surface through wells drilled from the surface, fig. 1. World experiences in UCG indicate that the primary form of coal energy should be treated much more rationally ...
    ... attention should be devoted to the special drilling techniques to facilitate the gasification process. After the boreholes are formed (two vertical wells: one injection and one production), the gasification initiator (oxidant and possibly steam) from the compressor station at high temperature would ...

  • Hidrogeotermalni resursi teritorije grada Beograda

    Ana Vranješ (2012-12-12)
    Republika Srbija je izrazito bogata hidrogeotermalnim resursima. Podzemne vode satemperaturama preko 20oC (pa do 96oC, Vranjska Banja) relativno su dobro iskorišćene.Nasuprot njima, podzemne vode sa temperaturama do 20oC do sada uglavnom nisu bilepredmet istraživanja sa bilo kog aspekta izuzev za potrebe vodosnabdevanja. Razvojemsistema toplotnih pumpi, mogućnosti višenamenskog korišćenja ovih voda značajno suuvećane.Teritorija Beograda odlikuje se značajnim resursima podzemnih voda, pre svega u okvirualuvijalnih peskovito-šljunkovitih naslaga i neogenih tortonsko-sarmatskih krečnjačkihnaslaga. Temperatura ovih voda ne prelazi 25oC. Njihovim zahvatanjem preko istražnoeksploatacionihbunara ...
    geotermalna energija, hidrogeotermalni resursi, hidrogeotermalni sistemi, hidrogeotermalnapotencijalnost, energetska valorizacija, hidrogeološka rejonizacija, grad Beograd

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Projection of SO2 emissions in coal power plants in Serbia

    Aleksandar Madžarević, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miodrag Ristović, Miroslav Crnogorac (2023)
    The production of electricity in the countries of South-Eastern Europe (SEE) was mainly related to the use of coal, predominantly lignite. The total installed capacity of thermal power plants using coal in these seven countries is 17.813 MW, distributed in 31 thermoblocks. The mentioned plants are the dominant pollutant emitters in all observed countries. Data on the largest emitters in the countries of the European Union and a comparison with SEE countries were collected. The calculation of emissions of ...
    енергeтика, емисије, СО2, угаљ, електране
    ... Comparisons were made with the emitters from EU countries with a special Jocus on SEE countries. The projections of future SOx emissions from new wells in parts of surface mining intended Jor exploitation was given. Keywords: energy, emissions, SO», coal, power plants 1. INTRODUCTION Reducing ...

  • Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia

    Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić (2022)
    The paper compares the flow regimes of the Resava River at the gauging stations of the Manasija Monastery (upper course) and the town of Svilajnac (lower course). The hydrological analysis encompasses a multiyear period of monitoring (1982–2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km2) and the Manasija Monastery station (358k m2), considering the overall monitoring period and characteristic years. The results indicate that the specific runoff in ...
    hydrogeological characteristics, water regime, water balance, karst aquifer, Resava catchment area
    ... groundwater. They are drained directly into the river, generally during dry periods, but largely by wells that service public and industrial water supply, as well as local, mostly shallow dug wells used for a farmland ir- rigation. 2. Fractured aquifer found along the western fringes of Mt. Beljanica ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... exploratory wells: Booster pump "Gigant". These are light autonomous pumps with the ability to sample water up to 60 m from wells with a diameter of only 50 mm. In addition to these pumps, the CKH also has several mechanical samplers that are used for frequent sampling from exploratory wells and from ...
    ... recording exploratory wells with diameters from 50 mm to 70 mm, depth to 500 m CKH also has equipment that was completely designed and made by the members of the CKH, for the purpose of removing obstacles from wells. It is a pneumatic-mechanical gripper for underwater work in wells, boreholes, reservoirs ...
    ... vodom). Ovakvi sistemi za podvodna snimanja su 34 Field equipment Research in boreholes and wells The most important objects in karst research are investigation boreholes and exploitation wells. The research that CKH performs on these objects during field research are: Measurement of groundwater ...

  • 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
    ... PAŠIĆ, D. D. TEHNIKA IZRADE BUŠOTINA 1, BUŠAĆA POSTROJENJA. Perforating Oil and Gas Wells. (n.d.). Preuzeto sa 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: ...
    ... 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 može ...
    ... SEMANTIC SCHOLAR. (2017). Preuzeto sa Relative Study of Internal Gravel Packing and Chemical Sand Consolidation: Sand Control Techniques of Niger Delta Wells: https://www.semanticscholar.org/paper/Relative-Study-of-Internal-Gravel-Packing-and- Sand-Maduabuchi-Appah/bffcd6dbeefe6c91fd3056a9e354320f1 38ea608 ...

  • Jeleč grad- još nepriznati objekat geonasleđa

    Marija Radisavljević, Danica Srećković Batoćanin, Vladan Vidosavljević, Irena Kajtez (2022)
    Остаци средњовековног града Јелеча на једном од врхова планине Рогозне (1262 m), по неким веровањима представљаju купу угашеног вулкана. Рогозна je позната по појавама скарновске Cu–Au минерализације, а трагови рударске активности и важних путева још од античких времена и даље постоје у непосредној околини. О томе сведочи и османски назив за Рогозну: Gümüş Dağ (Сребрна планина). Време изградње Јелеча је непознато. Постоје индиције да је постојао још у 6. веку, али се помиње први пут средином 12. века. Поуздан податак ...
    Rogozna, Jeleč, srednjevekovno utvrdjenje, kvarc latit, objekat geonasledja

  • 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
    ... Research indicates there might be a potential for leakages in CO2 storage. The possibility ofleakage may also occur in wells that penetrate storage formations hence these wells need to be sealed well to prevent CO2 from escaping into the atmosphere. Measurement monitoring and verification are used ...
    ... and high-cost cases of 0.5 and 4.0 USS/t CO» stored. Some reduction in these costs may be possible by reusing existing wells in these fields, but remediation of abandoned wells would increase the costs if required [82]. Figure 4.7 shows a depleted o1l and gas field with existing platforms. Natural ...
    ... flooding largely depends on the temperature and pressure of the reservoir. Heterogeneity with rock and fluid properties between formation and drilled wells reduces the effective performance of CO» flooding. EOR currently contributes to only 3 % of CO- utilization. [20] Although advances in this field ...

  • 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 улазнебрзине
    ... starting hypothesis is that wells age at varying rates in sediments of different oxic conditions. Hydrochemical and microbiological characteristics of the groundwater and the composition of the sediments comprising the aquifer matrix affect the rate of incrustation inside the wells, as does the operating ...
    ... drainage wells of the Kovin-Dubovac system collect anoxic groundwater featuring elevated iron concentrations and low sulfate levels. The aquifer is under the direct influence of the surface water regime of the Danube River, whose stages govern the discharge rates of the drainage wells. Their main ...
    ... caused by varying operation modes of the Iron Gate 1 HPP reservoir. The current operating regimes of the wells are such that the well screens remain minor clogging, although certain wells exhibit incrustation within the discharge pipe if installed above the water level of the drainage canals. ...

  • Projekcija razvoja osmatračke mreže podzemnih voda u Republici Srbiji

    Petar Dokmanović, Zoran Stevanović, Saša Milanović, Bojan Hajdin, Vesna Ristić-Vakanjac, Veljko Marinović (2016)
    ... 2/Inclusion of: a)the existing RHMS network as well as a part of wells in regional monitoring networks b)registered „direct users“ of GW sources in Republic of Serbia (RS) c)significant untapped springs i.e. new monitoring wells, in „uncovered“ GW bodies (GWB) 3/Defining of number and rough locations ...
    ... followed by continuous update of direct GW users data base as well as development of the network 2)Gradual abandoning of „excessive“ monitoring wells of RHMS and SEPA 3)Development of methodology for evaluation of pressure and pollution risk of punctual/”concentrated” polluters, followed by continuous ...

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... Tailing Ponds Žarkov Potok-A1 Gornje Polje-A2 Žitkovac-A3 Tvrd̄anski Do-A4 Bostanište-A5 Vicinity of the water source—C1 No 50 m—wells 50 m—wells. 12 km—wells 12 km—wells Vicinity of the settlement—C2 About 500 m About 200 m About 100 m About 50 m About 50 m Vicinity of agricultural area—C3 About ...
    ... created facilities and taken part in activities, which are not safe so close to tailing ponds. For example, at about 50 m from some landfills there are wells used for irrigation and water supply, while some fields and streams are also only 50 m away from some landfills. Generally, all of the five treated ...

  • 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 (2018)
    нафтна геологија, геотермална енергија, Панонски басен

  • 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
    ... pressure, temperature, and velocity distribution of two-phase flow in oil wells, Journal of petroleum science & engineering, Vol. 46, str 195-208, (2005) [46] J. Hagoort, Prediction of wellbore temperatures in gas production wells, Journal of petroleum science & engineering, Vol. 49, str 22-36, (2005) ...
    ... Pourafshari, F. Rabiee, Developing a novel temperature model in gas-lifted wells to enhance the gas-lift design, Vol. 2, str 81-85, (2014) [48] F. Farshad, J. Gerber, J. Lorde, Predicting temperature profiles in producing oil wells using aftificial neural networks, Society of petroleum engineers. Sixth ...
    ... 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 different phase equilibrium in comparison to the case without ...

  • Rudničke vode olovo-cinkovih ležišta u rudnom polju „Blagodat“ u jugoistočnoj Srbiji

    Nebojša Atanacković, Veselin Dragišić, Vladimir Živanović, Ivana Cvejić, Saša Stojadinović, Ivana Jocić (2022)
    Rudno polje Blagodat sa više ležišta i pojava olovo-cinkovih ruda nalazi se u krajnjem jugoistočnom delu Srbije, blizu granica sa Bugarskom i Severnom Makedonijom. Eksploatacija ovog resursa vrši se podzemno u okviru rudnika Grot, ranije Blagodat. Prilivi podzemnih (rudničkih) voda u jamske radove rudnika Grot su visoki i iznose oko 130 l/s (septembar 2019), što ga trenutno svrstava u najovodnjenije rudnike sa podzemnom eksploatacijom u Srbiji. Nezavisno od njih, iz obližnjeg potkopa P-1 u ležištu Kula, ističe još 25 ...
    rudničke vode, ovodnjenost rudnika, prilivi rudničkih voda, kvalitet rudničkih voda

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... design program and geo-referencing capabilities. Geological data correspond to real geological objects, such as geological units, boreholes, wells, tectonic structures, veins, which are represented in a GIS by digital data. There are two general approaches used for storing data in a GIS: the ...
    ... for geological features that can best be expressed by a single reference point; in other words, a simple location. For example, the locations of wells, boreholes, structural measurement or stratification. − One-dimensional lines or polylines are used for linear features such as boundaries, tectonic ...

  • The different approaches in seismic stratigraphy interpretation

    Dejan Radivojević (2018)
    U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.
    seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza
    ... oil companies a detailed and more precise insight into geological features, reduction of exploration risk and more rational design of development wells. Key words: seismic stratigraphy, oil and gas exploration, operational seismic sequence, seismic facies analysis ...

  • Hidrogeologija ležišta bakra i zlata Čukaru Peki – od istraživanja do eksploatacije

    Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Jelena Davidović (2022)
    Podzemne vode, Mineralne sirovine, Rudnička hidrogeologija, Odvodnjavanje rudnika, Timočki magmatski kompleks

  • The analysis of the geothermal energy capacity for power generation in Serbia

    Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)
    Renewable Energy, Sustainability and the Environment
    ... Bogati} BB-1 20 60 105 7.1 224.2 Heating Besides natural discharge of thermal water of the temperatures up to 83 °C, water of 111 °C flows out the wells VG-2 (1064 m) and VG-3 (1470 m) at the rate of 50 L/s in Vranjska Banja. The granitoid intrusion of Surdulica, a product of Tertiary magmatism, is ...
    ... thermal capacity for the present well yield of 200 L/s, is 70 MWt, of which 30 MWt in Vranjska Banja alone. Total thermal energy (for five tested wells) is estimated at about 2200 TJ per year. This information sheds new light on the potential geothermal water resource in Serbia. The highest measured ...

  • Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević (2017)
    ... measurement of basic structural elements of each units throughout the area, the obtained data were correlated with the results of two earlier drilled wells (KGK-13 and KGK-14) in the Rakovica stream valley (KNEŽEVIĆ, 1989). °e resulting stratigraphic data are interpreted in the context of Neoalpine geodynamics ...