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Charakterystyka mikrolitofacji oraz warunków paleotemperaturowych skał ediakaru w otworze wiertniczym Bibiela PIG-1

Kuberska Marta, Kozłowska Aleksandra, Sikorska-Jaworowska Magdalena, Grotek Izabella

Przegląd Geologiczny

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2021

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Vol. 69, nr 6

374--378

EN

The paper presents results of new petrographic and mineralogical analyses of Ediacaran clastic rocksin the Bibiela PIG-1 borehole drilled in 2016. Three types of microlithofacies have been distinguished. The basic types of rocks are siltstones and claystones containing thin layers of mudstones. Breccia is common, while sandstones form thin packages. The Ediacaran rocks are cut by numerous veins that intersect each other. They are filled with carbonates, quartz, chlorites and kaolinite. Ankerite, Fe-dolomite, dolomite, Mg-siderite (sideroplesite, pistomesite, metisite), Mn-siderite (manganosiderite) and Fe/Mn-calcite were identified among the carbonate minerals. Vitrinite reflectance index Ro (1.68%), Kübler index KI (0.72 to 1.10 Δo2ϴ CuK2) and smectite content (10-25%) in the mixed-layer illite/smectite indicate that the Ediacaran rocks in the Bibiela PIG-1 borehole have been altered under the conditions of late diagenesis at the maximum temperature estimated at approx. 160oC

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Petrographic characteristics of the Ordovician and Silurian deposits in the Baltic Basin (N Poland) and their relevance for unconventional hydrocarbon accumulations

Kuberska Marta, Sikorska-Jaworowska Magdalena, Kozłowska Aleksandra, Podhalańska Teresa

Geological Quarterly

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2021

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Vol. 65, No. 3

art. no. 44

EN

The Ordovician and Silurian deposits in the Baltic Basin are represented by siltstones, mudstones, limestones, marls, sandstones and, most commonly, claystones with a markedly shaley structure. Claystones that are particularly rich in organic matter are considered as potential reservoirs for shale gas accumulations. Samples from 11 boreholes, including core samples of the Piaśnica, Słuchowo, Kopalino, Sasino, Prabuty, Jantar, Pelplin and locally Pasłęk, Kociewie and Puck formations, were analysed by optical microscopy, cathodoluminescence (CL), scanning electron microscopy (SEM) and energy-dispersive spectrometry and X-ray diffraction analyses (XRD). The Piaśnica, Sasino, Jantar, Pasłęk and Pelplin formations are characterized locally by a dominance of black bituminous claystones with a high content of organic matter, and a generally consistent clay mineral composition. Individual samples only show variations in silt fraction and carbonate content. Very important is the negligible proportion of swelling minerals in the clay fraction; the percentage of smectite in the mixed-layered illite/smectite minerals does not exceed 15%. It is important for the rocks to have adequate [SiO2 >10%; Quartz (Q) + Feldspars (Fs) + Carbonates >40%] brittleness. The content of quartz, feldspars and carbonates (here >40%) suggests that the claystones are susceptible to hydraulic fracturing. The claystones show micropores between detrital grains, between the flakes of clay minerals, within pyrite framboids, and organic matter and secondary micropores within grains.

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Ropa naftowa i gaz ziemny w Polsce – obszary perspektywiczne oraz postępowanie przetargowe w 2018/2019 r.

Feldman-Olszewska Anna, Jankowski Leszek, Krzyżak Ewelina, Peryt Tadeusz, Sikorska-Jaworowska Magdalena, Wójcik Krystian

Przegląd Geologiczny

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2019

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Vol. 67, nr 1

13--26

EN

On the 28th of June 2017, the Polish Ministry of the Environment announced the boundaries of the 15 tender areas selected for the third licensing concession round for prospection, exploration and exploitation of hydrocarbons. In this paper we describe the areas located in the south-eastern (Ryki) and southern Poland (Proszowice W, Rudnik-Lipiny, Błażowa and Wetlina). The other areas have already been described in the previous issue of the Przegląd Geologiczny. The exploration target of the Ryki area is related to conventional gas deposits in the Upper Devonian and Carboniferous, as well as to unconventional tight gas deposits in the Frasnian carbonates. Prospects in the tender areas located in southern Poland are related to conventional oil and gas deposits in the Carpathians, Carpathian Foredeep and their Paleozoic-Mesozoic basement.

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20 years of experience in cathodoluminescence research at the PGI-NRI

Sikorska-Jaworowska Magdalena

Biuletyn Państwowego Instytutu Geologicznego

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2019

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nr 474

85--90

EN

The use of catholuminescence analysis in scientific research at the PGI-NRI has a 20-year history. The method, combined with other analytical techniques, has become an effective tool in widely understood mineralogical and petrographic investigation reported in numerous publications.

PL

Wykorzystanie analizy katodoluminescencyjnej w badaniach naukowych w PIG-PIB ma już 20-letnią historię. Metoda ta, w połączeniu z innymi technikami analitycznymi, stała się skutecznym narzędziem w szeroko pojętych badaniach mineralogiczno-petro¬graficznych. Potwierdzają to liczne publikacje.