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    Wyświetlanie 1-6 z 6
    Tytuł:
    Hydrogeochemical modeling of water injection into an oil and gas well under high-pressure high-temperature (HPHT) conditions
    Autorzy:
    Krogulec, Ewa
    Sawicka, Katarzyna
    Zabłocki, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/1835584.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    water injection
    well
    hydrogeochemical modeling
    Zechstein Main Dolomite
    Polska
    wtrysk wody
    odwiert
    modelowanie hydrogeochemiczne
    cechsztyński dolomit główny
    Polska
    Opis:
    Approximately 80% of water extracted from oil and gas deposits in Poland is disposed of by injection into the rock matrix. The aim of the model research was to predict both the hydrochemical reactions of water injected into wells for its disposal and the hydrogeochemical processes in the reservoir formation. The purpose of hydrogeochemical modeling of the hydrocarbon formation was also to determine the potential of formation waters, injection waters, and their mixtures to precipitate and form mineral sediments, and to determine the corrosion risk to the well. In order to evaluate saturation indices and corrosion ratios, the geochemical programs PHREEQC and DownHole SAT were used. The results of hydrogeochemical modeling indicate the possible occurrence of clogging in the well and the near-well zone caused mainly by the precipitation of iron compounds (iron hydroxide Fe(OH)3 and siderite FeCO3) from the formation water due to the presence of high pressures and temperatures (HPHT). There is also a high certainty of the precipitation of carbonate sediments (calcite CaCO3, strontianite SrCO3, magnesite MgCO3, siderite FeCO3) from the injection water within the whole range of tested pressures and temperatures. The model simulations show that temperature increase has a much greater impact on the potential for precipitation of mineral phases than pressure increase.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 419-433
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogeochemical modeling of water injection into an oil and gas well under high-pressure high-temperature (HPHT) conditions
    Autorzy:
    Krogulec, Ewa
    Sawicka, Katarzyna
    Zabłocki, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/138717.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    water injection
    well
    hydrogeochemical modeling
    Zechstein Main Dolomite
    Polska
    wtrysk wody
    odwiert
    modelowanie hydrogeochemiczne
    cechsztyński dolomit główny
    Polska
    Opis:
    Approximately 80% of water extracted from oil and gas deposits in Poland is disposed of by injection into the rock matrix. The aim of the model research was to predict both the hydrochemical reactions of water injected into wells for its disposal and the hydrogeochemical processes in the reservoir formation. The purpose of hydrogeochemical modeling of the hydrocarbon formation was also to determine the potential of formation waters, injection waters, and their mixtures to precipitate and form mineral sediments, and to determine the corrosion risk to the well. In order to evaluate saturation indices and corrosion ratios, the geochemical programs PHREEQC and DownHole SAT were used. The results of hydrogeochemical modeling indicate the possible occurrence of clogging in the well and the near-well zone caused mainly by the precipitation of iron compounds (iron hydroxide Fe(OH)3 and siderite FeCO3) from the formation water due to the presence of high pressures and temperatures (HPHT). There is also a high certainty of the precipitation of carbonate sediments (calcite CaCO3, strontianite SrCO3, magnesite MgCO3, siderite FeCO3) from the injection water within the whole range of tested pressures and temperatures. The model simulations show that temperature increase has a much greater impact on the potential for precipitation of mineral phases than pressure increase.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 419-433
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Podatność wód podziemnych w warunkach suszy hydrogeologicznej w płytkich systemach hydrogeologicznych
    Groundwater vulnerability in hydrogeological drought conditions in shallow aquifers
    Autorzy:
    Krogulec, Ewa
    Sawicka, Katarzyna
    Zabłocki, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/2061542.pdf
    Data publikacji:
    2019
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    podatność wód podziemnych
    DRASTIC
    głębokość do zwierciadła wód
    susza hydrogeologiczna
    groundwater vulnerability
    groundwater table depth
    hydrogeological drought
    Opis:
    Badania podatności wód podziemnych przeprowadzono w dolinie Wisły, na obszarze płytkiego występowania wód podziemnych. Wykonano analizę zmian stanów wód podziemnych w celu identyfikacji wartości średnich oraz wartości najniższych w wieloleciu 1999–2013. Na modelu hydrodynamicznym określono wartości zasilania infiltracyjnego odpowiadające stanom średnim w wieloleciu oraz stanom najniższym w warunkach suszy hydrogeologicznej. Przeprowadzono wariantową ocenę podatności wód podziemnych na zanieczyszczenia przy zastosowaniu metody DRASTIC, przyjmując do obliczeń średnie i najniższe stany wód podziemnych i odpowiadające im wartości zasilania infiltracyjnego. Mapy podatności dla obu wariantów podatności: podatności średniej (A) oraz w warunkach suszy hydrogeologicznej (B), przedstawiają zróżnicowanie przestrzenne występowania poszczególnych klas podatności. W wariancie A największą powierzchnię zajmuje średniowysoka i średnia klasa podatności. W okresie suszy hydrogeologicznej największą powierzchnię zajmuje średnia klasa podatności. Wyniki badań potwierdzają potrzebę wariantowej oceny podatności, szczególnie w płytkich systemach hydrogeologicznych, w których objęte są ochroną zróżnicowane ekosystemy, w tym ekosystemy zależne od wód podziemnych.
    The study of groundwater vulnerability was carried out in the Vistula river valley, in the area of shallow groundwater occurrence. An analysis of groundwater level changes was preformed to identify average values and the lowest values in the period of 1999–2013. On the hydrodynamic model, infiltration rate was determined corresponding to average groundwater levels and the lowest levels representing hydrogeological drought. A variant evaluation of groundwater vulnerability to pollutions was done using the DRASTIC method, assuming the average and the lowest groundwater levels and the corresponding infiltration rates for the calculation. The vulnerability maps for both vulnerability options: medium (A) and hydrogeological drought conditions (B), show the spatial diversity of individual vulnerability classes. In Variant A, the medium and medium high classes occupy the largest area. During the hydrogeological drought the medium class is the largest area. The research results support the need for a variant susceptibility assessment, especially in shallow hydrogeological systems in which diverse ecosystems are protected, including groundwater-dependent ecosystems.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2019, Hydrogeologia z. 16; 101--108
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena stopnia antropopresji wód podziemnych w rejonach poszukiwania i eksploatacji złóż węglowodorów
    Assessment of the anthropopressure degree of groundwater in the areas of hydrocarbon exploration and exploitation
    Autorzy:
    Krogulec, Ewa
    Sawicka, Katarzyna
    Zabłocki, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/2076062.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    wody podziemne
    monitoring dedykowany
    złoża węglowodorów
    zanieczyszczenie antropogeniczne
    wskaźniki geochemiczne
    groundwater
    dedicated monitoring
    hydrocarbon deposits
    anthropogenic pollution
    geochemical indicators
    Opis:
    The aim of the study was to propose a range of interpretation of the results of qualitative groundwater monitoring by using geochemical indicators to assess the degree of anthropogenic groundwater pollution. The location, scope and frequency of groundwater testing dedicated to the possibility of indicating the degree of pressure resulting from the activity in the field of hydrocarbon exploration and exploitation is proposed. On the basis of multistage monitoring research in the area of hydrocarbon exploration and exploitation, the qualitative groundwater base state was determined and change trends were characterized at each subsequent testing stage. Anthropogenic transformations of groundwater chemistry are the result of many overlapping factors, which is why the reason of water quality change is difficult to identify. The very statement of the presence of high values of physico-chemical parameters in waters does not have to prove the influence of the monitored object on their composition. It is proposed to use geochemical indicators: enrichment factor, pollution factor, geoaccumulation factor, and pollution load indicator to assess the degree of anthropogenic pollution of groundwater in the area of hydrocarbon exploration and exploitation. The geochemical indicators, which are proposed for use, enable the identification of substances of anthropogenic origin in waters and the detection of even the initial degree of anthropopressure on their composition in specific mining activities.
    Źródło:
    Przegląd Geologiczny; 2020, 68, 4; 242--248
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Groundwater vulnerability to pollution in degraded coal mining areas: modifying the DRASTIC method using the factor of exploitation impact on land surface
    Autorzy:
    Krogulec, Ewa
    Bukowski, Przemysław
    Niedbalska, Katarzyna
    Trzeciak, Joanna
    Zabłocki, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/27310140.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    groundwater vulnerability to pollution
    mining area
    coal activities
    mining exploitation phases
    Upper Silesia Coal Basin
    Polska
    Opis:
    Mining activities such as underground exploitation of hard coal deposits and open cast mining are strong factors on groundwater depending on mine life cycle phases. The impact of coal mining activities on groundwater have been reported from many countries. In this case, a vulnerability assessment was conducted base on standard DRASTIC method and its modification DRASTIC MINE (DRASTICM) method. In order to take into account, the impact of mining activities, a new parameter was added which defined the impact of coal seams on the rock mass above, including the degree of its drainage and the range of its impact. In the standard DRASTIC method, the results indicate that groundwater vulnerability with high (38.6%) and very high occurrence classes (16.9% of the area), mostly covers the central part of the cast mine. In contrast, the reclaimed area of the excavation is a low-class area. The DRASTICM method increased the vulnerability index from 3 to 24 on 95% of the area, so a new vulnerability class of extremely high was delineated, which occurred in 1.6% of the area. This indicates areas that should be treated as a priority in order to avoid pollution, and in the final stage to plan activities in the field of the reclamation of mining areas. The results showed that groundwater vulnerability assessment in coal mining areas can be significantly improved.
    Źródło:
    Geology, Geophysics and Environment; 2023, 49, 4; 313--334
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Causes of groundwater level and chemistry changes in an urban area; a case study of Warsaw, Poland
    Autorzy:
    Krogulec, Ewa
    Gruszczyński, Tomasz
    Kowalczyk, Sebastian
    Małecki, Jerzy J.
    Porowska, Dorota
    Sawicka, Katarzyna
    Trzeciak, Joanna
    Wojdalska, Anna
    Zabłocki, Sebastian
    Zaszewski, Daniel
    Powiązania:
    https://bibliotekanauki.pl/articles/24024702.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    urban area
    Quaternary aquifer
    Oligocene aquifer
    groundwater level changes
    infiltration
    groundwater chemistry
    Warsaw
    obszar miejski
    czwartorzędowe piętro wodonośne
    oligoceńskie piętro wodonośne
    zmiany poziomu wód gruntowych
    infiltracja
    chemizm wód podziemnych
    Warszawa
    Opis:
    The presented studies focus on changes in groundwater levels and chemistry, and the identification of important factors influencing these changes on short- and long-term scales in urban areas. The results may be useful for rational and sustainable groundwater planning and management in cities. The studies concerned three aquifers: (1) the shallow Quaternary aquifer, (2) the deep Quaternary aquifer, and (3) the Oligocene aquifer in the capital city of Warsaw (Poland). The spatial variability of groundwater recharge was determined and its changes in time were characterized. The characteristics of groundwater levels were based on long-term monitoring series. The results indicate that urban development has caused overall reduction in infiltration recharge (from 54 to 51 mm/year), which is particularly clear in the city suburbs and in its centre, where land development has significantly densified during the last 30 years. Studies of groundwater levels indicate variable long-term trends. However, for the shallowest aquifer, the trends indicate a gradual decrease of the groundwater levels. In the case of the much deeper Oligocene aquifer, groundwater table rise is observed since the 1970s (averagely c. 20 m), which is related with excessive pumping. Based on the studied results, the groundwater chemistry in the subsurface aquifer indicates strong anthropogenic influence, which is reflected in multi-ionic hydrogeochemical types and the occurrence of chemical tracers typical of human activity. The Oligocene aquifer is characterized by a chemical composition indicating the influence of geogenic factors.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 4; 495--517
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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