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    Wyświetlanie 1-2 z 2
    Tytuł:
    Analysis of reservoir parameters on the basis of well logging and DST of Miocene gas reservoirs in the central part of the Carpathian Foredeep, Poland
    Autorzy:
    Maruta, Michał
    Solecki, Marek L.
    Chruszcz-Lipska, Katarzyna
    Stachowicz, Katarzyna
    Dubiel, Stanisław
    Zubrzycki, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/1841628.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    statistics
    porosity
    permeability
    water inflow
    sandstones
    Polska
    statystyka
    porowatość
    przepuszczalność
    dopływ wody
    piaskowce
    Polska
    Opis:
    In the Polish part of the Carpathian Foredeep, an intensification of gas exploration and exploitation from Miocene strata took place in the middle of the twentieth century. In spite of a good degree of geological and reservoir recognition, the area of the Carpathian Foredeep is still considered to be prospective for the discovery of new gas reservoirs. Here we analyse statistically selected reservoir parameters of Miocene deposits, such as total porosity, effective permeability and reservoir water inflow. These parameters have been determined on the basis of interpretations of results of well logs and reservoir tests with tubular bed samplers (DST, Drill Stem Test). Analytical results in the form of regression and dependence of the logarithm of permeability as a function of porosity show a weak correlation. However, in the study area, the distribution of porosity values for Miocene strata is close to normal.
    Źródło:
    Geologos; 2020, 26, 3; 199-205
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentology and ichnology of Neogene Coastal Swamp deposits in the Niger Delta Basin, Nigeria
    Autorzy:
    Ezeh, S. C.
    Mode, W. A.
    Ozumba, B. M.
    Yelwa, N. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/94317.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    ichnofosylium
    sandstones
    heteroliths
    ichnofossil
    cores
    depositional environment
    Miocene
    piaskowce
    heterolity
    skamieniałość śladowa
    rdzenie
    środowisko sedymentacji
    miocen
    Opis:
    Often analyses of depositional environments from sparse data result in poor interpretation, especially in multipartite depositional settings such as the Niger Delta. For instance, differentiating channel sandstones, heteroliths and mudstones within proximal environments from those of distal facies is difficult if interpretations rely solely on well log signatures. Therefore, in order to achieve an effective and efficient interpretation of the depositional conditions of a given unit, integrated tools must be applied such as matching core descriptions with wireline log signature. In the present paper cores of three wells from the Coastal Swamp depositional belt of the Niger Delta are examined in order to achieve full understanding of the depositional environments. The well sections comprise cross-bedded sandstones, heteroliths (coastal and lower shoreface) and mudstones that were laid down in wave, river and tidal processes. Interpretations were made from each data set comprising gamma ray logs, described sedimentological cores showing sedimentary features and ichnological characteristics; these were integrated to define the depositional settings. Some portions from one of the well sections reveal a blocky gamma ray well log signature instead of a coarsening-upward trend that characterises a shoreface setting while in other wells the signatures for heteroliths at some sections are bell blocky in shaped rather than serrated. Besides, heteroliths and mudstones within the proximal facies and those of distal facies were difficult to distinguish solely on well log signatures. However, interpretation based on sedimentology and ichnology of cores from these facies was used to correct these inconsistencies. It follows that depositional environment interpretation (especially in multifarious depositional environments such as the Niger Delta) should ideally be made together with other raw data for accuracy and those based solely on well log signatures should be treated with caution.
    Źródło:
    Geologos; 2016, 22, 3; 191-200
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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