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    Wyświetlanie 1-8 z 8
    Tytuł:
    Ilościowa charakterystyka porowatości i przepuszczalności utworów czerwonego spągowca potencjalnie zawierających gaz ziemny zamknięty
    Quantitative porosity and permeability characterization of potential Rotliegend tight gas reservoirs
    Autorzy:
    Such, P.
    Leśniak, G.
    Słota, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074768.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    porowatość
    przepuszczalność
    gaz zamknięty
    porosity
    permeability
    tight gas
    Rotliegend sandstones
    Opis:
    Withinaframe of the research project on Rotliegend tight gas, a data base comprising 760 full sets of reservoir and permeability parameters was created. Data from 55 wells were collected from interval of 1650-5003 m. The obtained results showed presence of clastic reservoirs sufficient for formation of "tight gas" type deposits in each of the analyzed wells. In most of the wells, reservoir rock series with non-zero permeability were detected. Parameters of pore space suggest the major role of compaction processes in pore space evolution, except for some areas where cementation processes were predominating. A high-permeability anomaly characterizing a separate group of eolian sandstones from the depths of over 4000 m anomaly may be explained as due to presence of pseudo- and micro-fractures.
    Źródło:
    Przegląd Geologiczny; 2010, 58, 4; 345-351
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza inkluzji fluidalnych w wypełnieniach przestrzeni porowej skał czerwonego spągowca w wybranych rejonach Niżu Polskiego
    Fluid inclusion analysis of pore space fillings in Rotliegend rocks from selected regions of the Polish Lowlands.
    Autorzy:
    Jarmołowicz-Szulc, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074692.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    inkluzje fluidalne
    czerwony spągowiec
    piaskowce
    przestrzeń porowa
    fluid inclusions
    Rotliegend
    sandstones
    pore space
    Opis:
    Fluid inclusions - tiny portions of palaeofluids trapped in minerals filling pore space in sedimentary rocks - were analysed. The studies covered carbonate, quartz and anhydrite cements in the Rotliegend rocks from several boreholes in north, north-western, central and south-west parts of the Polish Lowlands. They aimed at obtaining characteristics of fluid inclusions in the specific geological material, microthermometric measurements and use of fluid inclusions as geothermometer with reference to main petrological research conducted by A. Maliszewska and M. Kuberska in the above mentioned regions. Fluid inclusion studies comprised microscopic characteristics of these forms, fluorescence and cathodoluminescence observations and microthermometry. Due to different types of cements, different features of these inclusions have been observed. In general, the inclusions are two- or one-phase ones, primary and/or secondary, small, rare and hard to distinguish. Homogenisation temperatures of inclusions obtained in the studied samples lie in different intervals due to inclusion type and position. Generally they are above 100oC. Densities of fluids are differentiated and the systems are found to represent generally NaCl brines of changeable chemical systems. The microthermometric results have been compared with effects of analyses of light isotopes (carbon, oxygen) from the same cements. Data show presence of low-and high-temperature generations of cements.
    Źródło:
    Przegląd Geologiczny; 2009, 57, 4; 343-349
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petrograficzno-petrofizyczna charakterystyka piaskowców eolicznych strefy Siekierki–Winna Góra (koło Poznania) w aspekcie poszukiwań złóż gazu zamkniętego w osadach czerwonego spągowca
    Petrographical-petrophysical characteristics of the Rotliegend eolian sandstones of the Siekierki–Winna Góra Zone (the Poznań region) in the aspect of search for gas trapped in deposits
    Autorzy:
    Buniak, A.
    Kuberska, M.
    Kiersnowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074693.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    górny czerwony spągowiec
    piaskowce eoliczne
    złoża gazu ziemnego
    Upper Rotliegend
    eolian sandstones
    gas deposits
    Opis:
    The studied Siekierki–Winna Góra region is situated in northern part of the Fore-Sudetic Monocline, close to its boundary with the Mogilno–Łódź synclinorium, and comprises areas stretching south-eastwards of Poznań. The top of the Rotliegend deposits occurs there at depths ranging from 3.5 to 3.7 km. The major aim of the studies was to establish petrophysical characteristics of Upper Rotliegend eolian sandstones these rocks and define influence of diagenetic processes (especially compaction and cementation) on their reservoir properties. The petrographical and petrophysical analyses covered mainly top parts of profiles of Upper Rotliegend eolian sandstones from 9 boreholes. On the basis of the detailed sedimentological and facies analyses, it became possible to distinguish three depositional eolian groups in the studied region. These groups are related to desert sedimentation environment, that is dune, interdune and redeposition environments. The studies howed reduction of porosity and permeability of Upper Rotliegend eolian sandstones in an area from Siekierki through Pławce, Miłosław and Komorze and further south-eastwards, despite of advantageous facies development of these rocks. Diagenetic compaction and cementation are the processes responsible for this reduction. However, reservoir properties of these sandstones appear sufficient to treat the above mentioned zones as prospective. Such depositional traps may be best treated as unconventional tight gas deposits (Poprawa & Kiersnowski, 2008).
    Źródło:
    Przegląd Geologiczny; 2009, 57, 4; 328-334
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Skały osadowe czerwonego spągowca w wierceniu Kutno 2 w warunkach postulowanego jurajskiego wydarzenia termicznego oraz wysokich nadciśnień : studium petrograficzne
    Rotliegend sedimentary rocks in the Kutno 2 well under conditions of a postulated Jurassic thermal event and high overpressure : a petrographic study
    Autorzy:
    Kuberska, Marta
    Kiersnowski, Hubert
    Poprawa, Paweł
    Kozłowska, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/2076191.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    basen spągowca polskiego
    struktura Kutna
    petrografia
    termika
    Polish Rotliegend Basin
    Kutno structure
    petrography
    thermal history
    Opis:
    A highs ignifance of the Kutno 2 deep borehole is due to its location in the central zone of the Polish Basin where the Rotliegend complex has previously never been achieved by other drill holes and thus was not recognized and studied. Drill core from the Rotligend of the Kutno2 has been recently studied for its petrography and facies. The Rotligend in this zone is represented by fluvial and alluvial sediments. It is composed mainly of fine- to coarse-grained sandstones, with conglomerate inter beds. Diagenetic processes of the sediments have been dominated by mechanical and chemical compaction, as well as by transformation of the unstable mineral components. Fluid inclusion analysis for quartz and carbonates indicates that the diagenesis-associated temperature reached 120-180°C. The presence of haematite pseudomorphoses after framboidal pyrite indicates an extremely high palaeotemperature of approx. 500°C. Itis related here to the Jurassic hydrothermal event. The recent very high reservoir pressure might be associated with high temperatures due to the aqua thermal pressure mechanism.
    Źródło:
    Przegląd Geologiczny; 2021, 69, 6; 365--373
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Występowanie gazu ziemnego zamkniętego w piaskowcach czerwonego spągowca Polski
    Tight gas accumulations in Rotliegend sandstones of Poland
    Autorzy:
    Kiersnowski, H.
    Buniak, A.
    Kuberska, M.
    Srokowska-Okońska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074767.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    piaskowiec czerwonego spągowca
    gaz zamknięty
    niekonwencjonalne złoża gazu
    Rotliegend sandstones
    tight gas
    unconventional gas fields
    Opis:
    The paper presents the first unconventional tight gas field discovered in tight low permeability (K > 0.1 mD) eolian sandstones in the Polish Upper Rotliegend Basin. The tight gas field has been found in area east of Poznań (Siekierki zone). In that area, reservoir eolian sandstones lost almost all permeability and partly porosity due to compaction and illitization processes. The origin of the gas trap was analyzed in many variants, from which one was selected as the most probable. It is assumed that main source for illite crystallization were Zechstein hypersaline brines rich in Ca, Na, K and SO4, which infiltrated the Rotliegend sandstones on tectonically uplifted block. The gas generation and migration were taking place at the same time as processes responsible for decrease in sandstone permeability have been ceasing. As a result, tight gas field from the Siekierki zone can be defined as an unconventional gas field occurring in conventional structural trap. It is expected that tight gas fields could also originate in deeper parts of the Polish Rotliegend Basin but under conditions of BCGS (Basin-Centered Gas System). Gas fields originating under this system are without classic seal and its capacity can be significantly bigger than those of conventional gas fields. The type of organic matter occurring in mature Carboniferous rocks was determining composition of gas formed at gas generation phase. It also affected the chemical content of infiltrating fluids and, in this way, had significant influence on the course of diagenetic processes. In the fault zones, diagenetic cements formed impermeable barriers which separate conventional and unconventional gas fields, as well as barriers separating individual parts of these fields. Such compartmentalization was surely important for origin of the tight gas reservoirs in the Polish Upper Rotliegend Basin.
    Źródło:
    Przegląd Geologiczny; 2010, 58, 4; 335-346
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    O badaniach izotopowych diagenetycznego illitu z piaskowców czerwonego spągowca Wielkopolski i Pomorza Zachodniego
    Isotopic investigations of diagenetic illite of Rotliegend sandstones from the Wielkopolska and Western Pomerania regions
    Autorzy:
    Maliszewska, A.
    Kuberska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074690.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    diagenetyczny illit
    wiek K-Ar
    wody porowe
    piaskowce
    czerwony spągowiec
    diagenetic illite
    K-Ar age
    pore waters
    sandstones
    Rotliegend
    Opis:
    Diagenetic illite tends to crystallize most often as fibres and it forms net-like textures reducing filtration abilities of sandstones. Rocks containing this type of illite show a very low permeability or may even be impermeable. K-Ar datings of crystallization of these fibres define the time when permeability was reduced and duration of the post-depositional period when the deposits were permeable for pore fluids, including gaseous and liquid hydrocarbons. Clay fractions <0.2 ěm and <0.3 ěm were isolated from 12 samples of the Rotliegend sandstones fromWestern Poland in order to define the K-Ar age of illite. The results of investigations show that this age from the fraction <0.2 ěm falls between 187.1 and 113.6Ma (tab. 1), that covers a long period since early Jurassic to late Cretaceous. The determination of 18O in illite (15.1–15.9‰SMOW), performed in East Kilbride laboratory, and calculations of hypothetic temperatures of illite crystallization (125–173°C) show that it crystallized from pore waters of marine origin and with 18O values ranging from 4.3 to 7.5‰ SMOW, which probably infiltrated from evaporitic Zechstein deposits.
    Źródło:
    Przegląd Geologiczny; 2009, 57, 4; 322-332
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geneza gazu ziemnego akumulowanego w utworach karbonu i czerwonego spągowca w nadbałtyckiej części Pomorza Zachodniego
    Origin of natural gases accumulated in Carboniferous and Rotliegend strata on the Baltic part of the Western Pomerania
    Autorzy:
    Kotarba, M.
    Pokorski, J.
    Grelowski, C.
    Kosakowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074397.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Pomorze Zachodnie
    karbon
    czerwony spągowiec
    gaz ziemny
    izotopy trwałe
    geochemia
    Western Pomerenia
    Carboniferous
    Rotliegend
    petroleum geochemistry
    methane
    gas origin
    stable isotopes
    Opis:
    Origin of natural gas of Gorzysław, Białogard and Daszewo fields from Lower and Upper Carboniferous, and Rotliegend reservoirs on the Baltic part of the Western Pomerania was characterized by means of geochemical methods. The results of molecular analyses as well as stable carbon isotope analyses of methane, ethane, propane and carbon dioxide, stable hydrogen isotope analyses of methane and stable nitrogen isotope analyses of gaseous nitrogen enabled the determination of gas origin. Gaseous hydrocarbons and carbon dioxide originated from thermogenic processes from type III kerogen with small component of type II kerogen. At least two phases of gas generation took place: the first one at the stage of 0.6 to 0.8%, and the other one at the stage of 1.4 to 1.8% maturity of source rocks in the vitrinite reflectance scale. Gaseous hydrocarbons generated from source rocks within the Upper Carboniferous (Wesphalian) and Lower Carboniferous (Visean) strata. Nitrogen probably originated during thermocatalytic processes of organic matter transformation and partly in abiogenic processes.
    Źródło:
    Przegląd Geologiczny; 2005, 53, 5; 425--433
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wstępne wyniki modelowań przestrzennych (3D) parametrów petrofizycznych skał podczas poszukiwań stref występowania gazu zamkniętego w polskim basenie czerwonego spągowca
    Preliminary results of 3D modeling of petrophysical parameters for tight gas prospecting in the Polish Rotliegend Basin
    Autorzy:
    Papiernik, B.
    Górecki, W.
    Pasternacki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074766.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    model 3D
    modelowanie facji
    model petrofizyczny
    gaz zamknięty
    czerwony spągowiec
    3D model
    facies modeling
    petrophysical modeling
    tight gas
    Rotliegend
    Opis:
    The Rotliegend Basin is filled with terrigenic complex over 1200 m in thickness. The complex comprises sediments of eolian, fluvial and playa depositional systems (Fig. 1). Reservoir volume of the pore space accessible for the reservoir media is ca. 830-990 km3. Gas exploration in this stratigraphic unit is now focused at depths of around 3000-3800 m b.s.l., in the near-top zone. Poor reservoir properties, especially permeabilities, are here the limiting factor for conventional exploration. A change in the prospecting strategy to comprise tight gas targets moves research into the deeper zone covering the whole profile of the Rotliegend. The paper presents preliminary results of 3D modeling of lithofacies and related petrophysical parameters variability. The static model was created with the use of Petrel 2009.2. Structural framework was built using regional structural, isopach and facies maps. It was relatively detailed, comprising 9 576 000 cells organized in 3 zones and 60 layers. To estimate facies model, the authors used results of integrated environmental analysis of core data and logs from 117 wells (Fig. 2 ). Models of clay content (Vsh) and porosity (PHI) were based on logs from 75 wells. The obtained results show that the northern margin of the Eastern Erg is characterized by presence of numerous eolian strata with porosity ranging from 5 to 15%. Their quality, quantity and thickness decrease toward the north, along with increase in depth. Modeling results indicate that the dominating porous layers of eolian sandstones and fluvial inserts are often intercalated with "non-reservoir" layers revealing porosity below 5%. In this zone, a deeper part of the Rotliegend section should be investigated more thoroughly (Fig. 5, 6, 9). The Pomeranian sector of the Central Basin is dominated by playa and fluvial sediments (Fig. 7, 8, 10). Slightly clayey eolian strata make a few, laterally discontinuous intercalations. Gas accumulations could be expected within local, laterally confined interlayers of eolian and fluvial sandstones with porosity of around 5-12%. Due to the location in the near-base part of the Rotliegend section, close to Carboniferous source rocks, they may be filled with gas, forming so-called sweet spots. Probability of gas occurrence in Pomerania is high as indicated by the Międzyzdroje gas field or small accumulation found in Piaski-PIG2 well. The presented preliminary study allowed to test usability of 3D modeling in tight gas prospecting. Fully reliable results will be obtained after increasing precision of the models comprising detailed seismic interpretation, the use of seismic attributes, and inclusion of quantitative data in diagenetic processes and sedimentology of layers in the modeling process.
    Źródło:
    Przegląd Geologiczny; 2010, 58, 4; 352-364
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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