Temat: Carpathian sandstones - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Temperature and isotopic relations in the Middle Miocene sandstones from the Ukrainian Carpathian Foredeep Basin - a reconnaissance study
Autorzy:: Jarmołowicz-Szulc, K.
Kozłowska, A.
Kuberska, M.
Powiązania:: https://bibliotekanauki.pl/articles/191662.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: isotopes
fluid systems
sandstones
calcite cement
Middle Miocene
Carpathian Foredeep
Ukraine
Opis:: Studies of the Middle Miocene sandstones in selected wells from the western Ukraine concerned calcite cements, both from isotopic and fluid inclusion aspects. The aim of the reconnaissance study was to find out inclusion – isotopic constraints for the calcite cements in the sandstones. The studied sandstones are subarkosic, sporadically sublithic arenites. The delta¹³¹⁸
Źródło:: Annales Societatis Geologorum Poloniae; 2011, 81, No 1; 79-86
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Diagenesis and reservoir properties of the Middle Miocene sandstones in the Polish segment of the Carpathian Foredeep
Autorzy:: Kozłowska, A.
Kuberska, M.
Maliszewska, A.
Powiązania:: https://bibliotekanauki.pl/articles/191666.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: sandstones
diagenesis
pore space
reservoir properties
Upper Badenian
Sarmatian
Carpathian Foredeep
Opis:: The Upper Badenian and Sarmatian sandstones from eight wells of the Carpathian Foredeep Basin have been studied. The following research methods were used: petrographic analysis with the use of polarizing microscope (staining analysis, cathodoluminescence studies – CL, porosity determinations, fluid inclusion ana- lysis), scanning electron microscope (SEM) investigations and energy dispersive spectrometer studies (EDS ISIS), X-ray diffraction analyses (XRD), isotopic analysis and petrophysical studies. The sandstones are very-fine to medium-grained subarkosic and sublithic arenites and wackes. The main components of the sandstone grain framework are quartz, feldspars (potassium feldspar and plagioclase), lithoclasts (fragments of carbonate rocks, clastic rocks, granitoids, volcanic rocks and quartz-mica schists) and micas (mainly muscovite). Bioclasts (mainly foraminifera), glauconite, ooids, organic matter and accesory minerals are subordinate. Pore spaces between the grains are filled by matrix and by cement (mostly Fe-calcite, quartz overgrowth, dolomite, siderite and kaolinite). The Middle Miocene sandstones show good and very good filtration abilities. Sandstones porosity very often exceeds 20% and permeability is above 100 mD. Primary intergranular porosity is considerably more frequent than secondary intragranular porosity (mainly dissolution of feldspar grains) and intercrystalline porosity (clays microporosity). Effects of the following diagenetic processes can be observed in the sandstones: compaction, cementation, dissolution, replacement and alteration. Primary porosity reduction in sandstones was predominantly caused by mechanical compaction by about 26% and cementation, mainly by calcite, by approximately 35% on the average. Some increase in porosity was caused by dissolution of detrital grains, mainly feldspars, and decay of the soft parts of organisms. Diagenetic and related reservoir properties evolution of the Middle Miocene sand- stones have been accomplished during eo- and mesodiagenesis.
Źródło:: Annales Societatis Geologorum Poloniae; 2011, 81, No 1; 87-103
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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