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    Wyświetlanie 1-4 z 4
    Tytuł:
    How many Upper Triassic bone–bearing levels are there in Upper Silesia (southern Poland)? A critical overview of stratigraphy and facies
    Autorzy:
    Szulc, J.
    Racki, G.
    Jewuła, K.
    Środoń, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/191258.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    bone beds
    lithostratigraphy
    palynostratigraphy
    chemostratigraphy
    taphonomy
    Grabowa Formation
    middle Keuper
    Upper Silesia
    Opis:
    At least three widely separated bone-bearing intervals in the Upper Triassic succession of Upper Silesia, ranging in age from the Carnian to Rhaetian (i.e., in the interval of 25 Ma), are presented in papers by the Warsaw research group, led mainly by Jerzy Dzik and/or Grzegorz Niedźwiedzki. The stratigraphic arguments are reviewed for the vertebrate localities studied so far, in particular for the well-known middle Keuper sites at Krasiejów and Lipie Śląskie, to show that the previously proposed age assignments are still inadequately documented and questionable. This unreliability is exemplified by the evolving stratigraphic correlation of the fragmentary Silesian sections (8–18 m thick) with informal subsurface units from central-western Poland and with the German standard succession, ultimately not corroborated by comparison with the composite reference succession of the Upper Silesian Keuper, including new profiles (ca. 260 m thick) from the Woźniki K1 and Patoka 1 wells. Based on a multidisciplinary stratigraphic study covering consistent litho-, bio-, climato- and chemostratigraphic premises, focused on the regional reference section, two bone-bed levels only are recognized in the Patoka Marly Mudstone-Sandstone Member (= Steinmergelkeuper) of the Grabowa Formation, not very different in age (Classopollis meyeriana Palynozone; probably IVb Subzone): (1) the localized Krasiejów bone breccia level (early Norian in age) in the Opole region, and (2) the far more widely distributed Lisowice bone-bearing level (middle Norian) in a vast alluvial plain (braided to anastomosing river system) during the Eo-Cimmerian tectonic-pluvial episode. As a consequence of the principal uncertainties and controversies in Upper Triassic terrestrial stratigraphy, this is still a somewhat preliminary inference. Typical skeletal concentra- tions of a combined hydraulic/sedimentologic type, related to fluvial processes, are common in the Upper Silesian Fossil-Lagerstätten, although factors governing preservation are probably important, as well.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 4; 587-626
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geofizyka otworowa w dobie poszukiwań gazu w łupkach : przegląd metod pomiarowych
    Well logging in the world of shale gas plays : review of the logging methods
    Autorzy:
    Zorski, T.
    Jarzyna, J.
    Derkowski, A.
    Środoń, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075079.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    core data analysis
    shale gas
    well logging
    analiza danych rdzeni
    gaz łupkowy
    geofizyka otworowa
    Opis:
    The purpose of this article is to review the possibilities of using well logging in the exploration and completion of the shale gas plays. This presentation is addressed to a broad geological community. The article is divided in two parts, the first is focused on the borehole logging tools and methods, while the second describes the construction of petrophysical models and considers some specific aspects of well logging application in the shale gas plays. For the more inquiring readers a comprehensive list of literature is presented. Well logging is the way to acquire an important geological information from the boreholes, parallel to the core data analysis. Laboratory core analysis gives most reliable and comprehensive description of rock parameters, like mineral and chemical composition, kerogen content and its maturity, porosity, the pore space structure, density, permeability etc. However, this kind of analysis is time consuming and expensive. On the other hand, well logs give less accurate and usually not directly measureable values, which must be interpreted to achieve the requested parameters. These measurements are made continuously in natural rock conditions and the results can be obtained very quickly. Proper calibration methods are necessary to link the logging data and the detailed laboratory core analyses. A wide range of well logging tools is described briefly in the paper, and the electrical, nuclear, NMR, and sonic methods are presented in more detail. Special attention is paid to the great technological progress in well logging during the last two decades. This progress allows to cope with the increasing difficulties in the reservoir evaluation. Complicated geometry of the directional borehole, thin beds, shaly-sand lithologies, low porosities, and the specific the pore space distributions are the main challenges in the shale gas plays.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 7; 424--434
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geofizyka otworowa w dobie poszukiwań gazu w łupkach : modele interpretacyjne i specyfika zastosowań w zagadnieniach rozpoznawania złóż gazu z łupków
    Well logging in the world of shale gas plays : interpretative models and specific applications in the shale gas research
    Autorzy:
    Zorski, T.
    Jarzyna, J.
    Derkowski, A.
    Środoń, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075082.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    core data analysis
    shale gas
    well logging
    analiza danych rdzeni
    gaz łupkowy
    geofizyka otworowa
    Opis:
    The purpose of this article is to review the possibilities of using well logging in the exploration and completion of the shale gas plays. This presentation is addressed to a broad geological community. The article was divided in two parts: the first one, already published in PG, which was focused on the borehole logging tools and methods, and the current one, which deals with the construction of petrophysical models and considers some specific aspects of well-logging application in the shale gas plays. For more inquiring readers, a comprehensive list of literature is presented. The construction of petrophysical models in the thin-bedded shale-sand Miocene gas formation of the Carpathian Foredeep is presented briefly as a possible predecessor of the methodology applicable in the shale gas plays based on domestic experiences. However, the application of well logging in shale gas formations, both at the evaluation and completion steps, differs in the methodology in comparison to conventional and even to thin-bed formations. This specificity is also discussed, where attention is focused on the quantity and quality of organic matter and its relation to gas. Low porosity and a special kind of pore space in organic shales are considered as well.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 8; 478--488
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bentonitized tuffites in the Lower Eocene deposits of the Subsilesian Unit (Western Outer Carpathians, Poland): lithology, stratigraphic position and mineral composition
    Zbentonityzowane tufity w dolnoeoceńskich osadach jednostki podśląskiej (polskie Zachodnie Karpaty Zewnętrzne): litologia, pozycja stratygraficzna i skład mineralny
    Autorzy:
    Cieszkowski, M.
    Środoń, J.
    Waśkowska-Oliwa, A.
    Leśniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/191629.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Polish Outer Carpathians
    Subsilesian unit
    Early Eocene
    bentonitized tuffites
    foraminiferal assemblages
    Opis:
    New occurrences of bentonitized tuffites were described from numerous outcrops of the Lower Eocene flysch rocks of the Subsilesian Unit. These deposits crop out in the Żywiec tectonic window and in the tectonic windows of the Lanckorona - Żegocina Structural Zone. The bentonitized tuffites, composed of almost pure dioctahedral motmorillonite, form numerous thin layers and laminae, only occasionally exceeding 5 cm. The age of the tuffites is estimated as the Early Eocene (Glomospira div. sp. and Saccamminoides carpathicus zones) on the basis of foraminiferal assemblages. They occur in the upper part of green shales and in the lower part of the Lipowa beds that consist mainly of muddy turbidites represented by green or green-brownish shales with rare intercalations of sandstones. The sedimentary sequences with the tuffite intercalations form a lithostratigraphic level in the Subsilesian Unit called in the present paper "the Glichów Tuffite Horizon". This tuffite horizon could probably be correlated with deposits of similar age containing tuffites which are known from the Magura, Silesian and Skole nappes.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2006, 76, No 2; 197-214
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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