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    Wyświetlanie 1-8 z 8
    Tytuł:
    Selection of effective chemical compounds for drilled wells
    Autorzy:
    Macuda, J.
    Klima, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/299014.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    hydrochemistry
    water well
    well screen
    rehabilitation of wells
    regeneration of wells
    well clogging
    Opis:
    Drilled wells during their operation are subject to so-called “aging” processes, which is visible in the decrease of their efficiency and increase in depression. The process, especially in case of quaternary and tertiary waters, is most affected by the chemical colmatation of the filter and filter-adjacent zone with chemical compounds precipitated from the flowing water. The literature analysis shows that ferrous sediments are the main mass of sediments clogging the quaternary and tertiary water intakes. They are usually in the form of soft reddish-colored sediments, and their essential element is Fe2O3 and FeO. Iron, siderite and quartz hydroxides were also found. The degree of colmatation in such wells can be significantly reduced by frequent renovations with chemical methods. The article presents results of laboratory tests on dissolution of sediments clogging withdrawal well filters with sodium dithionite (Na2S2O4) and sodium pyrosulphite (Na2S2O5). Representative samples were taken from selected quaternary water intakes in northern Poland.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 181-186
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Drilling large diameter water wells in carbonate strata in the Lublin area
    Autorzy:
    Macuda, J.
    Macuda, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/298629.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    well
    water well
    hydrogeological well
    drilling technology
    reverse circulation
    drilling technology parameters
    cogged bit
    drillability test
    Opis:
    One of the most important sources of water for communal purposes in the Lublin area are the useful groundwater aquifers intaken with deep drilled wells. Such wells should be highly efficient and localized in a close vicinity of the local water supply network to lower the cost of transport. Large amounts of water can be produced by large diameter wells, where heavy duty pump aggregates can be installed. High rates of penetration cannot be obtained if the profile abounds in hardly drillable carbonate. This elongates the time of drilling and increases negative impact of mud on the near well zone of the aquifer. It also lowers hydraulic parameters of the well. To improve the efficiency of the wells, drillability tests with cogged bits were performed in carbonate rocks to optimize the mechanical parameters of drilling. Measurement sections, each 0.3 to 0.5 m long, were selected for the tests. Each section was drilled at constant rotational speed and weight of bit values. Prior to the drillability tests, the limits on the weight of bit and rotational speed of the bit were established, in line with the technological characteristic of rig Wirth B3A, strength of the string and of the cogged bit.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 31-39
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Loss and restoration of water coning control - field case history and prediction
    Autorzy:
    Wojtanowicz, A.
    Jin, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/298978.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    oil well production
    water coning
    downhole water sink
    Opis:
    It is well known that water coning is a difficult-to-solve problem in heavy oil reservoirs with bottom water. A promising solution is offered by the downhole water sink (DWS) technology – a dual well completion technique for water coning control in reservoirs with bottom aquifer. In the field case addressed in this study, a DWS well was installed in a heavy oil reservoir underlined by thin water zone – notorious for severe water coning problem. Initially, the two well’s completions had no separating packer; Later, the well was recompleted with packer and displayed much improved oil productivity and water coning control. However, after accidental shutdown of the bottom (water sink) completion and continuing production from the top (oil pay) completion the well was rapidly watered out and shut down. In this study, the well’s production history is analyzed to better understand dynamics of water coning control with packer-less DWS and the effect of temporary water sink shut-down. The analysis is performed with a radial grid-based simulation model using the reservoir properties and well production data. An adequate history match is achieved by tweaking reservoir properties within their uncertainty range – mostly the relative permeability and capillary pressure curves. The packer-less completion displays steady invasion of water to the top oil completion through the gravel pack with no separating packer. The analysis also confirms detrimental effect of sole temporary shutdown of the water sink (bottom) production that caused rapid buildup of water saturation in the oil pay zone around the well. This work also evaluates possible restoration of oil productivity by putting the well back on production after a dormant period of time (when water cone might subside) and the contribution of the bottom water drive (aquifer strength) to the restored productivity. A 25-year production performance forecast is performed for three scenarios of well’s operation after the water sink completion’s shut-down for one month: (a) no shut-down and continuing production as DWS well; (b) one-month shut down and conversion to a conventional single-completed well; (c) one-month shut down and continuing production as DWS well. The results reveal that the watered-out well could be revived as an oil producer only by restoring its DWS operation [scenario (c)] as the conventional well operation [scenario (b)] would produce only water. Moreover, detrimental effect of temporary water-sink shut down would irreversibly reduce well's productivity by more than 10 percent. It is also shown that stronger aquifer stimulates DWS well productivity improvement of up to 20 percent in case of strong bottom water drive.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 343-360
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Many years’ extraction of groundwater in the context of established usable groundwater reserves
    Autorzy:
    Macuda, J.
    Styrkowiec, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/298693.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    well
    intake well
    usable reserves
    establishing reserves
    life of well
    water extraction
    groundwater reserves
    test pumping
    well construction
    Opis:
    The operation of water supply networks basically relies on the ability of supply water, which in the case of groundwater intakes, is defined by usable reserves offered by the wells involved. Their establishing is the last stage of an investment, i.e. building of groundwater intakes, and their value determines the type of infrastructure and technological hardware in the wells. Owing to the fact that the usable groundwater reserves are conditioned by a number of factors (economic, technological, environmental) their correct determining depends on the correct definition of the number and quality of measurements and hydrogeological observations. In practice, these measurements tend to be shortened to minimum (test pumping) or discarded (diagnostics of well construction) for financial reasons. As a result the user obtains either over- or underestimated information about the intake parameters. Exploitation of a well with overestimated capacity brings about serious technological and economic consequences, starting from the lowered productivity (drop of water table, lower yield), change of chemical composition of water, sanding up of the well as well as well failures and damage. The use of a well with underrated output does not shorten the life of the well, though is disadvantageous for the economic reasons. The productivity of wells can be verified after a few years of controlled extraction, on the basis of which the cost of water extraction, stability of chemical composition or impact on other intakes in given work conditions. Accordingly, this is a basis for updating usable groundwater reserves of the wells. Moreover, after many years of observation of groundwater intakes, one can formulate recommendations warrantying long life of wells, rational management of pump aggregates and well renovation plans.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 2; 419-427
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ograniczenie migracji wód powierzchniowych i czwartorzędowych wokół otworu podsadzkowego TP-17 w Kopalni Soli "Wieliczka"
    Limitation of surface and quaternary waters around a backfilling well TP-17 in the Salt Mine "Wieliczka"
    Autorzy:
    Gonet, A.
    Stryczek, S.
    Brudnik, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/299979.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    likwidacja otworów
    migracja wód
    geoinżynieria
    water migration
    geoengineering
    closing the well
    Opis:
    Kopalnia Soli "Wieliczka" po ponadsiedmiowiekowym istnieniu charakteryzuje się różnorodnymi zagrożeniami. Jednym z najpoważniejszych jest zagrożenie wodne. Od wielu lat prowadzi się prace zabezpieczające mające na celu jego zminimalizowanie. Na przykładzie otworu podsadzkowego TP-17 przedstawiono: jego położenie, zadania i przyczyny migracji wody do kopalni, technologie likwidacji otworu TP-17 i uszczelnienia wokół niego górotworu, uzyskane wyniki prac geoinżynieryjnych.
    The Salt Mine "Wieliczka" has been subjected to a number of hazard during its 7 centuries history. The most important hazard comes from water. Prevention and protection works have been undertaken to minimize the risk. On the example of a backfilling well TP-17 there were presented: its location, tasks and causes of water migration to the mine, technologies of closing the well TP-17 and sealing up the neighboring rock mass, results of geoengineering works.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2007, 24, 1; 205-209
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Auxiliary gravity drain and infiltration wells supporting basic drainage system in the “Bełchatów” Lignite Mine
    Autorzy:
    Macuda, J.
    Gasiński, J.
    Grad, J.
    Szewczyk, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/299020.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Bełchatów Lignite Mine
    Bełchatów lignite field
    drainage
    dewatering of opencast mine
    mine gravity drain well
    gravity infiltration well
    dewatering wells
    residual water
    Opis:
    The downhole parts of the “Bełchatów” Lignite Mine are dewatered through large diameter dewatering wells belonging to the primary drainage system. This system is supported by additional shallow wells performed in the overburden, in the forefield of extraction site or on the extraction site itself. They are used for limiting and removing residual water from extraction site, which corresponds to the height of excavator level. They are preceded by the analysis of dewatering of the mining benches based on the results of control drilling and observation of the water table in the existing piezometric wells. Shallow auxiliary wells are drilled with the “dry” rotary method to about 30 m of depth. Such wells considerably reduce the amount of water coming to the mine with rainwaters, and which were not captured by wells of the primary drainage system. This is mainly caused by such factors as complex geological build, disturbed system of strata, presence of synclinal structures and closed lenses. The technique and technology of drilling supporting shallow wells with the “dry” rotary method and their effect on dewatering of active extraction sites are discussed in this paper.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 245-253
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of a problem of phase transitions at not isothermal filtration and qualitative properties of the decision
    Modelowanie problemu fazowego przejścia w nieizotermicznej filtracji i jakościowe właściwości decyzji
    Autorzy:
    Mukhambetzhanov, S. T.
    Darkhan, A-Z. Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/300546.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    model matematyczny
    strefy przyotworowe
    algorytm
    nasycenie wodą
    mathematical model
    well-boring areas
    algorithm
    water saturation
    Opis:
    The resolvability of Stephen's problem with convective heat transfer met in problems of the theory of not isothermal filtration is considered in the paper. The speed of a liquid phase is considered to be known and congruent with the Darcy law. Everywhere where the temperature of fusion of paraffin is lower, it is considered to be equal to zero.
    W pracy przeanalizowano możliwość rozwiązania problemu Stephena dla transferu ciepła konwekcyjnego, pojawiającego się w teorii filtracji płynu nieizotermicznego. Przyjęto, że znana jest wartość prędkości przepływu fazy ciekłej zgodnie z prawem Darcy'ego. Wszędzie tam, gdzie temperatura topienia parafiny jest niska, zakłada się, że jest równa zeru.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2008, 25, 2; 541-549
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Techniczne i technologiczne aspekty zatłaczania wód złożowych do górotworu
    Technical and technological aspects of injection of reservoir water to the rock mass
    Autorzy:
    Macuda, J.
    Lewkiewicz-Małysa, A.
    Konopka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/299655.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    wody złożowe
    odwiert chłonny
    sedymentacja
    flokulacja
    kolmatacja
    strefa przyodwiertowa
    uzdatnianie wody
    reservoir waters
    injection zones
    water treatment
    sedimentation
    flocculation
    colmatation
    near-well zone
    Opis:
    Zatłaczanie wód złożowych do górotworu poprzez odwierty chłonne powinno być prowadzone przy spełnieniu wymogów dotyczących bezpiecznego prowadzenia prac górniczych i ochrony środowiska. Problem ten ma szczególne znaczenie zwłaszcza przy wykorzystaniu do celów zatłaczaniu odwiertów zastawionych lub przeznaczonych do likwidacji. W artykule przedstawiono kryteria doboru odwiertów chłonnych oraz zakres niezbędnych badań konstrukcji odwiertów poeksploatacyjnych przeznaczonych do zatłaczania wód złożowych do górotworu. Zaprezentowano również wyniki badań laboratoryjnych wód złożowych o znanych właściwościach fizykochemicznych, których celem było określenie i wyeliminowanie pierwotnych czynników sprzyjających kolmatacji strefy przyodwiertowej.
    Reservoir water injection to the rock mass through disposal wells should meet mining and environmental safety requirements. This problem is of special significance in the case of wells that are either abandoned wells or to be closed. The selection criteria for disposal wells and range of necessary tests and analyses of post-exploitation wells' construction designed for injection of reservoir water are presented in the paper. The results of laboratory analyses of reservoir water of known physicochemical properties were used for determining and eliminating original factors favorable to the colmatation of the near-well zone.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2007, 24, 2; 799-806
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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