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    Wyświetlanie 1-11 z 11
    Tytuł:
    Determination of reservoir properties through the use of computed X-ray microtomography – eolian sandstone examples
    Autorzy:
    Dohnalik, M.
    Jarzyna, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/184436.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    reservoir rocks
    petrophysical properties
    Rotliegend sandstones
    Opis:
    The possibility of examining rock pore structure by the means of computed X-ray microtomography was presented. Parameters characterizing the pore structure, such as: porosity and coefficient of homogeneity of pore structure by local porosity examination, box counting dimension, mean chord length, normalized Euler number, as well as coordination number were all determined through pore structure image analyses. Complementary methods, such as helium pycnometry, mercury injection capillary pressure and NMR were used to determine the porosity along with other factors to make the comparison and determine mutual relationships between petrophysical properties obtained from various sources. The study covered the Rotliegend sandstones of eolian origin. Laboratory investigation of the reservoir properties was focused on three areas, according to their geological regions, where the Rotliegend sediments showed changeability in geological features and reservoir properties. Computed X-ray microtomography showed differentiation between the investigated areas, with respect to their pore structure and porosity development. This differentiation was confirmed by means of other applied laboratory methods.
    Źródło:
    Geology, Geophysics and Environment; 2015, 41, 3; 223-248
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of the Rotliegend sandstones in the Polish part of the Southern Permian Basin - permeability and porosity relationships
    Autorzy:
    Jarzyna, J.
    Puskarczyk, E.
    Bała, M.
    Papiernik, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/191899.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Rotliegend sandstones
    porosity
    permeability
    Flow Zone Index
    FZI
    facies
    Opis:
    The Flow Zone Index, FZI, applied to order relations between the effective porosity and permeability of the Rotliegend sandstones in the Polish part of the Southern Permian Basin turns out to be a useful and effective factor to evaluate ability of media flow in a rock formation. A dataset of over 2000 samples from 78 wells was analysed. Based only on porosity and permeability, FZI includes all non-parameterized features of rocks as tortuosity and diameters of porous channels, volume of trapped parts of capillary roads, specific surface of pore space, and others. When FZI increases, the ability of fluid to move through the porous space increases. In most cases, the Rotliegend sandstones reveal FZI in the range of 0.5-2.0. The highest FZI, ca. 100, is related to fractured part of the studied formation. The combination of FZI and facies information from several wells in the study area (over 1200 samples) showed a good correlation. On the basis of FZI we can divide a set of samples of the Rotliegend sandstone into groups of defined fluid flow abilities and relate them to facies. Also, we show the way of estimation of the reliable values of permeability in full geological log of a borehole on the basis of FZI, and the total porosity determined from well logging interpretation.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2009, 79, No 1; 13-26
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of the Rotliegend sandstones in the Polish part of the Southern Permian Basin - permeability and porosity relationships
    Autorzy:
    Jarzyna, J.
    Puskarczyk, E.
    Bała, M.
    Papiernik, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/191479.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Rotliegend sandstones
    porosity
    permeability
    Flow Zone Index
    FZI
    facies
    Opis:
    The Flow Zone Index, FZI, applied to order relations between the effective porosity and permeability of the Rotliegend sandstones in the Polish part of the Southern Permian Basin turns out to be a useful and effective factor to evaluate ability of media flow in a rock formation. A dataset of over 2000 samples from 78 wells was analysed. Based only on porosity and permeability, FZI includes all non-parameterized features of rocks as tortuosity and diameters of porous channels, volume of trapped parts of capillary roads, specific surface of pore space, and others. When FZI increases, the ability of fluid to move through the porous space increases. In most cases, the Rotliegend sandstones reveal FZI in the range of 0.5-2.0. The highest FZI, ca. 100, is related to fractured part of the studied formation. The combination of FZI and facies information from several wells in the study area (over 1200 samples) showed a good correlation. On the basis of FZI we can divide a set of samples of the Rotliegend sandstone into groups of defined fluid flow abilities and relate them to facies. Also, we show the way of estimation of the reliable values of permeability in full geological log of a borehole on the basis of FZI, and the total porosity determined from well logging interpretation.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2009, 79, No 2; 13-26
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    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:
    X-ray micro computed tomography characterization of porosity in Rotliegend sandstones on the northern slope of the Wolsztyn Ridge, western Poland
    Autorzy:
    Poszytek, A.
    Mikołajewski, Z.
    Dohnalik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060542.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Rotliegend
    lithologic traps
    sandstones
    porosity
    Wolsztyn Ridge
    computed microtomography
    Opis:
    Natural gas in the Polish Rotliegend Basin occurs in porous and permeable aeolian sandstones, and traps are mostly structural. Lithological traps are rare and occur on the northern slope of the Wolsztyn Ridge where fluvial and aeolian sandstones overlap with alluvial facies. Both fluvial and aeolian sandstones are reservoir rocks in this area. The X-ray micro computed tomography (MCT) results and microscopic observations indicate that the sandstones in lithologic traps on the northern slope of the Wolsztyn Ridge form highly compartmentalized vertical reservoir rocks composed of four types of sandstones. The profiles are dominated by very low-porosity fluvial sandstones (F2), and low-porosity aeolian and fluvial sandstones (A2, F1). The A1 type of sandstones with high porosity (10%) occurs only in some sections of the profiles. The most important diagenetic processes that reduced porosity were compaction and cementation by carbonate cements. All studied sandstones were subjected to the same diagenetic processes. However, each of the processes ran with varying intensity in different types of sandstones. Detailed analyses of pore distribution by MCT methods with respect to primary depositional or lithofacies effects, and secondary diagenetic effects, help to understand the 3D geometry of pores and pore shape-size distributions. The results can be used in the studies of other sandstones with a different origin and age.
    Źródło:
    Geological Quarterly; 2016, 60, 4; 801-810
    1641-7291
    Pojawia się w:
    Geological Quarterly
    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:
    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:
    Applicability of DST results to the evaluation of changes of geologic conditions of Rotliegend series in the Polish Lowland
    Autorzy:
    Dubiel, S.
    Rybicki, Cz.
    Zubrzycki, A.
    Maruta, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/298595.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Rotliegend series
    Aeolian sandstones
    natural gas accumulations
    standard Halliburton drill stem tester
    bottom hole pressure
    rock permeability
    Drill Stem Tester (DST)
    Opis:
    The presented theoretical analysis and industrial examples of interpretation of DST results for the Rotliegend series in the Polish Lowland were focused on the changes of gas productivity factor and commercial value of the analyzed horizon; permeability changes of the Rotliegend series in the wellbore area; facial changes of the Rotliegend.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 1; 77-88
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the non-project operating modes of the gas pipeline transportation system
    Autorzy:
    Volynskyy, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/298860.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Rotliegend series
    Aeolian sandstones
    Drill Stem Tester (DST)
    natural gas accumulations
    standard Halliburton drill stem tester
    bottom hole pressure
    rock permeability
    Opis:
    The paper refers to the investigation of various non-project operating modes that can occur during the operation of the gas pipeline transmission system. The only method of research is mathematical modeling since the study of accidents and emergency situations in real pipeline is unacceptable. Therefore, in order to carry out the set tasks, mathematical modeling and computer simulation of the gas pipeline system and processes that can cause accidents in its work were applied. As an object of study area was taken a hypothetical gas pipeline transportation system with the possibility to research its unsteady processes arising from the sudden closing of valves, emergency gas leak, the appearance of illegal gas extraction, connecting or disconnecting of looping etc. A mathematical model of the system is based on the classical equations of unsteady gas flow, continuity and energy together with the equation of state of a real gas, which form a closed system. Boundary value problem is selected according to the operating conditions. The obtained results allow us to generalize the findings of a significant impact of location of a gas leak or its extraction for the period of its discovery and the rate of change of the gas flow mode in the pipeline.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 2; 335-343
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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