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Browsing by Subject "fluid"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analysis of hydrogen gas saturation in sedimentary sequences of Volyn-Podillya (Ukraine)
    (Wydawnictwa AGH, 2025) Hubych, Ihor; Krupskyi, Yuii; Tsikhon, Serhii
    With the aim of using hydrogen energy by the Ukrainian industry, the paper considers the general patterns of hydrogen distribution in the sedimentary sequences of Volyn-Podillya. The general features of the distribution of water-dissolved and sorbed gases in rocks within productive and water-saturated complexes are analyzed. The genetic relationships between individual components of natural gases have been established, which allows us to identify depth intervals where hydrogen predominates in the well section. The latter, when used for regional forecasting, makes it possible to establish zones, and thus directions for the search for hydrogen accumulations in the sedimentary cover in Volyn-Podillya.
  • thumbnail.journal.alt
    Item type:Doctoral Dissertation, Access status: Restricted ,
    Wybrane aspekty inżynierii cieczy plastycznolepkich stosowanych w technologiach wiertniczych
    (Data obrony: 2010) Skrzypaszek, Krzysztof
    Wydział Wiertnictwa, Nafty i Gazu
    The aim of the thesis was determining dependences for Herschel-Bulkley rheological model to be applied to technological drilling fluids. Its realization lied in introducing necessary mathematical formulae, and working out a research stand for laboratory evaluation of hydromechanical effects taking place in the analyzed fluids. The algorithms developed out in the thesis enabled determining rheological parameters of the Herschel-Bulkley model and calculating fluid flow resistance in the specific places of the circulation system of the borehole. Then followed methodics of determining equivalent viscosity, general Reynolds number and Fanning friction loss factor. Based on the laboratory tests and analyses of the obtained results, numerical programs were elaborated. They aided both identification of a rheological model which best describes real drilling fluid, and facilitated calculation of fluid resistances in the circulation system o a borehole. Finally, the author proves the thesis that: „Herschel-Bulkley fluid model most accurately describes drilling fluids and should be applied in industrial conditions".