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Упит dcterms_subject_txt:well logging

31 items

  • Development and evaluation of fracture gradient curve model: a case study of south-central Kazakhstan

    Branimir Stanisavljevic, Vesna Karovic Maricic, Irena Isakov (2022)
    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 ...
    gradijet frakturiranja, model nove krive, projektovanje naftne bušotine, Kazahstan

  • 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

  • Pregled hidrodinamičkih istraživanja bunara sa horizontalnim drenovima numeričkim metodama

    Đorđije Božović, Dušan Polomčić, Dragoljub Bajić (2020)
    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 voda

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    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 ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... Petroleum System – From Source to Trap. AAPG Memoir, 60: 93–120. Peters, K. E. & Nelson, D. A., 1992. REESA – An expert system for geochemical logging of wells. AAPG Annual Convention Abstract, Calgary, Alberta, Canada, June 22–25, 1992. AAPG Search and Discovery Article #91012 p. 103. Peters ...
    ... The Petroleum System — From Source to Trap. AAPG Memoir, 60: 93-120. Peters, K. E. & Nelson, D. A., 1992. REESA - An expert system for geochemical logging of wells. AAPG Annual Convention Abstract, Calgary, Alberta, Canada, June 22-25, 1992. AAPG Search and Discovery Article #91012 p. 103. Peters, K ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Annales Societatis Geologorum Poloniae (2021), vol. 91: .. ...

  • 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
    ... to construct the well casing and the process may extend to the immediate vicinity of the well screen and even affect the aquifer itself. For the above reason, focus of the thesis is on the processes that lead to well clogging and the impact of such processes on declining well capacity. The starting ...
    ... doctoral dissertation  WATER WELL AGEING IN ALLUVIAL SEDIMENTS OF DIFFERENT OXIC CONDITIONS SUMMARY Water well ageing is generally a consequence of corrosion and clogging. Corrosion can be prevented by installing well casings made from materials resistant to corrosion ...
    ... степена оксичности;Water well ageing in alluvial sediments of different oxic conditions Brankica Majkić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Старење бунара у алувијалним срединама различитог степена оксичности;Water well ageing in alluvial sediments ...

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)
    ... depicted in Figure 10. Due to the need to allow different modes of usage to different users, the creation of user accounts is envisaged, along with logging in prior to usage of this application. The largest set of envisaged user functions is related to query expansion, functions that can already be ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs INFOTHECA – Journal of Informatics and Librarianship № 1-2 ...
    ... be mentioned. Besides different types of e-dictionaries, the Group is engaged in developing other resourc- es, such as the e-corpus of Serbian, as well as parallel multilingual corpora composed of par- allel texts or bi-texts, usually comprising two texts of which one is original, and the other its ...

  • Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)

    Ljiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije

    Vladimir Šaraba (2021)
    Sa namerom definisanja hidrogeološke uloge i značaja mikrobiološkog diverziteta odabranih pojava mineralnih voda Srbije, primenom sistema biodetektora, dokazano je prisustvo gvožđevitih, sulfato-redukujućih, sluz-produkujućih, heterotrofnih aerobnih i denitrifikacionih bakterija, na osnovu čega je proračunat rizik od razvoja procesa biokorozije i biohemijske inkrustacije, te zdravstveni rizik. Uz procenu rizika, izvedene su analize skenirajuće elektronske mikroskopije biofilmova i hidrogeohemijsko modeliranje, te makroskopska, otpička i difrakciona ispitivanja naslaga inkrustacije, dok je fizičko-hemijskim analizama utvrđena vrednost ukupne mineralizacije iznad 1 g/L, kao i povišeni ...
    biohidrogeologija, SEM analize, makroskopska i optička ispitivanja, rendgenska difrakcija praha, hidrogeohemijsko modeliranje, BART analize, metabarkoding analize mikrobioma, fizičko-hemijske analize, starenje bunara (biokorozija, biohemijska inkrustacija i biozarastanje), zdravstveni rizik
    ... y microbiology, 57(2), 243-249. Cullimore, D. R. (1999). Microbiology of well biofouling (Vol. 3). USA: CRC press. Cullimore, R. (2008). Determination of Plugging and Corrosion risks in water wells of all types, Water well rehabilitation workshop protocol 22608. Drycon Bioconcepts Inc., Saskatchewan ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET U BEOGRADU RUDARSKO - GEOLOŠKI FAKULTET ...
    ... sulphur bacteria, Methylotenera, Flavobacterium, Melioribacter and Dechloromonas. The research concludes that the respective microorganisms cause water well aging and define the ecological status of the water resources, while, on the other hand, some of the genera possess the biotechnological potential ...

  • Снимање подземних инсталација GPR (Ground penetrating Radar) системом

    Невена Ђурђев (2024)
    Циљ овог мастер рада на тему ,,Снимање подземних инстлација GPR (Ground penetrating radar) системом” је био да се прецизно идентификују положаји подземних инсталација и прикључака, због сумње да су поједине инсталације постављене изван пројектованих позиција.Георадарски систем одабран је за детектовање и идентификовање подземних инсталација, због своје способности да обезбеди неинвазивно и детаљно снимање подземних структура.Првобитно је примењена GNSS метода снимања коришћењем GPS-а, потом услед немогућности отварања шахти, одлучено је да се примени георадарска у комбинацији са електромагнетном методом. Након ...
    катастар, катастар водова, подземне инсталације, методе детекције подземних инсталација, георадарска метода, георадар
    ... back-light - U-ion = typically 27-hours of intermittent use · Accessory Port /' - AC and DC charging - Details for pipeline evaluation i- s> Data Logging - 50 Million record internal storage - A-Frame Fault and Holiday Locator / - GPS coordinates / - Download data with MyLocator app /' - Access ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs VHuBep3HreT y Beorpajty PyynapcKo-TreoJiomiKH (DakyJ1TeT ...

  • 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 termalnevode
    ... water, gave conclusions about characteristics and system functioning. According to isotope content, video-endoscopy and re-interpretation of well logging in certain locations it could be concluded that groundwater have very deep circulation, or that the karstification of carbonate complexes developed ...
    ... ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET U BEOGRADU RUDARSKO-GEOLOŠKI FAKULTET ...
    ... CA MASSIF Abstract In order to define recharge zones, groundwater-surface water interaction, mean residence time and groundwater age, as well as genesis of hydrochemisty and temperature regimes of cold and lukewarm water, it was necessary to conduct a large number of different methodological ...

  • Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia

    Оливера Крунић (2021)
    минералне воде