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    Wyświetlanie 1-9 z 9
    Tytuł:
    1-D modelling of the hydrocarbon generation history of the Jurassic source rocks in the Tarnogród–Stryi area (SE Poland – western Ukraine)
    Autorzy:
    Kosakowski, P.
    Wróbel, M.
    Koltun, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/191544.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    source rocks
    1-D modelling
    hydrocarbon generation
    hydrocarbon expulsion
    Jurassic
    SW Poland
    Western Ukraine
    Opis:
    Reconstruction of burial and thermal history was modelled for the Mesozoic strata in the basement of the Polish and Ukrainian parts of the Carpathian Foredeep and in the marginal part of the Outer Carpathians. The 1-D modelling was carried out in profiles of the wells located in the area between Tarnogród and Stryi towns. In the Polish part, the modelling were performed in the profiles of the Księżpol 15, Lubliniec 9, Markowice 2 and Opaka 1 wells, and in the Ukrainian part in the profiles of the Chornokuntsi 1, Korolyn 6, Mosty 2, Podiltsi 1 and Voloshcha 1 wells. The geochemical characteristics of the Mesozoic stratigraphical horizons revealed that the best features of source rocks were present in the Middle Jurassic strata in the Polish part of the study area and in the Middle and Upper Jurassic strata in the Ukrainian part. Within these strata, the horizons of source rocks were distinguished and their quantitative evaluations were characterized. For these horizons, reconstruction of processes for hydrocarbon generation and expulsion were performed. The source rocks in the Polish part reached maturity only in the initial phase of “oil window”. However, the maturity achieved towards the end of the Upper Jurassic was insufficient to exceed the 10% threshold of the transformation degree for hydrocarbon generation. Therefore, the amount of generated hydrocarbons was minimal. Slightly higher maturity of organic matter in the Ukrainian part resulted in exceeding the thresholds of kerogen transformation and the initiation of hydrocarbon generation and expulsion processes. The process began after the deposition of thicker Miocene formations and developed even up to the main phase of the "oil window". The amount of the generated hydrocarbons reached ca. 150 mg/g TOC with an insignificant volume of expulsion.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 473-485
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of hydrocarbon potential of the Lower Palaeozoic strata in the Tarnogród–Stryi area (SE Poland and western Ukraine)
    Autorzy:
    Więcław, D.
    Kosakowski, P.
    Kotarba, M.J.
    Koltun, Y. V.
    Kowalski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191878.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    source rock
    hydrocarbon potential
    Cambrian
    Ordovician
    Silurian
    Carpathian Foredeep basement
    SE Poland
    Western Ukraine
    Opis:
    Quantity, genetic type and maturity of organic matter dispersed in the Lower Palaeozoic sequence from the Lower Cambrian to Silurian strata of the Polish and Ukrainian parts of the Carpathian Foredeep basement in the Tarnogród–Stryi area were evaluated based on the results of geochemical analyses of 475 rock samples collected from 45 wells. The best source rocks were found in the Silurian strata where the present total organic carbon (TOC) content is up to 2.6 wt%. They occur in the vicinity of Wola Obszańska, where the median of the present and the initial total organic carbon (TOC) contents in the individual wells amount to 0.98 and 1.6 wt%, respectively. The Cambrian and Ordovician strata have a poorer hydrocarbon potential and their present TOC content never exceeds 1 wt%. In all of the investigated Lower Palaeozoic strata, organic matter is represented by the oil-prone Type-II kerogen deposited in anoxic or sub-oxic conditions. The maturity of source rocks ranges from early mature (the initial phase of the low-temperature thermogenic processes) in selected zones of the Silurian strata in the vicinity of Wola Obszańska, through the middle and the final phase of “oil window” in the Ordovician and Cambrian strata in the Polish part of the study area, to the overmature stage in the Ordovician strata in the south-eastern part of the study area (Ukraine).
    Źródło:
    Annales Societatis Geologorum Poloniae; 2012, 82, 1; 65--80
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of hydrocarbon potential of the autochthonous Miocene strata in the NW part of the Ukrainian Carpathian Foredeep
    Autorzy:
    Kotarba, M. J.
    Więcław, D.
    Kosakowski, P.
    Koltun, Y. V.
    Kowalski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191375.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    source rocks
    hydrocarbon potential
    organic geochemistry
    Miocene
    Bilche-Volytsia Unit
    Ukrainian Carpathian Foredeep
    Opis:
    The quantity, genetic type, maturity and hydrocarbon potential of dispersed organic matter were determined for the complete sequence of the autochthonous Miocene ranging from the Lower Badenian Sandy-Calcareous Series to the Lower Sarmatian Upper Dashava Formation of the Bilche-Volytsia Unit. Geochemical analyses were conducted on 78 core samples collected from 11 wells in the Ukrainian Carpathian Foredeep between the Ukrainian-Polish state border and the Stryi River. The most favourable source-rock parameters characterize the Upper Badenian Kosiv Formation where the highest TOC contents, from 0.44 to 2.01 wt% (median 0.76 wt%), were found. Only slightly lower values were obtained for the Lower and the Upper Dashava formations – from 0.01 to 1.45 wt% (median 0.72 wt%) and from 0.62 to 0.77 wt% (median 0.71 wt%), respectively. In the Lower Badenian Sandy-Calcareous Series, the Lower Badenian Baraniv beds, and the Upper Badenian Tyras Formation, the TOC content is lower and varies from 0.00 to 0.77 wt%. Immature type III (terrestrial) kerogen dominates the analysed sections of the Kosiv and Dashava formations. Marine organic matter was detected sporadically, and only in the Upper Badenian Kosiv Formation in the vicinity of Kokhanivka, and in the Upper Badenian Kosiv and Tyras formations.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 395-407
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geological and physical-chemical characteristics of Lower Paleozoic deposits of Volhyno-Podillya, Western Ukraine
    Charakterystyka geologiczna i fizykochemiczna dolnopaleozoicznych osadów Wołynia i Podola (zachodnia Ukraina)
    Autorzy:
    Kurovets, I.
    Drygant, D.
    Naumko, I.
    Kurovets, S.
    Koltun, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2062817.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    geology
    petrophysics
    fluid inclusions
    Lower Paleozoic
    shale gas
    Volhyno-Podillya
    geologia
    petrofizyka
    inkluzje fluidalne
    dolny paleozoik
    gaz łupkowy
    Wołyń
    Podole
    Opis:
    The 340 to 1102 m thick multi-facies sequence was deposited during the Silurian at the Volhyno-Podillya margin of the East European Platform. The open shelf facies bordered from the west by a barrier formed by reefs, bioherms, crinoids, or by banks of detrital sediments (at the boundary of the lagoon and the open sea). Lagoonal deposits are represented by thin intercalations of sedimentary dolomites, sometimes with intercalations of organogenic limestones, marls, argillites, gypsum and anhydrite. Within the open shelf and slope facies, marls, lumpy clayey limestones and argillites are prevailing. A zone of reefal buildups has a rather complicated and insufficiently investigated structure. The exclusively terrigenous deposits of the submerged part of the continental slope form the entire Silurian sequence in the central part of the L’viv Depression and in the Carpathian Foredeep. Open porosity of the Silurian argillites vary from 0.6 to 2.4% and they are almost impermeable (less than 0.001 μm2•10–3). Volume weight ranges between 2.64 and 2.8 g/cm3. Natural radioactivity of rocks varies from 9 to 18 mcR/hr, apparent electric resistance is 20–154 Ohmm, interval time of longitudinal waves spreading is 126–365 μcs/m. TOC content, determined in 21 samples using the thermal analysis, varies from 0.75 to 2.38%. The composition of volatiles of fluid inclusions and closed pores of argillites shows the predominance of methane (up to 100 vol. %). In deeper horizons, carbon dioxide, nitrogen and ethane (a few percent) appear.
    Zróżnicowane facjalnie utwory syluru, miąższości od 340 do 1102 m, były deponowane na wołyńsko-podolskiej krawędzi platformy wschodnioeuropejskiej. Bariera budowana przez rafy, biohermy i ławice materiału detrytycznego graniczyła na zachodzie z facjami otwartego szelfu. Na wschód od tej bariery, w lagunie, tworzyły się osady dolomitowe z przeławiceniami organogenicznych wapieni, margli, iłowców, gipsu i anhydrytu. Osady szelfu i skłonu są reprezentowane głównie przez margle i ilaste wapienie gruzełkowe oraz argility. Strefa bariery rafowej ma dość skomplikowaną i jeszcze niedostatecznie rozpoznaną budowę. Osady terygeniczne występują tylko w zanurzonym odcinku skłonu kontynentalnego w centralnej części depresji lwowskiej oraz w podłożu zapadliska przedkarpackiego. Efektywna porowatość argilitów sylurskich wynosi od 0,6 do 2,4% i są one prawie nieprzepuszczalne (mniej niż 0,001 μm2ּ10–3). Gęstość objętościowa waha się pomiędzy 2,64 i 2,8 g/cm3. Promieniotwórczość naturalna skał sięga od 9 do 18 mcR/h, a pozorna oporność właściwa wynosi 20–154 Ohmm, czas interwałowy rozchodzenia się fal podłużnych – 126–365 μcs/m. Zawartość TOC, określona w 21 próbkach z wykorzystaniem analizy termicznej, waha się od 0,75 do 2,38%. Skład substancji lotnych z inkluzji fluidalnych i zamkniętych porów w argilitach wykazuje dominację metanu (do 100% obj.). W głębszych horyzontach pojawiają się dwutlenek węgla, azot i etan (kilka procent).
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2012, 449; 119--130
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbial gas system and prospectives of hydrocarbon exploration in Miocene strata of the Polish and Ukrainian Carpathian Foredeep
    Autorzy:
    Kotarba, M. J.
    Peryt, T. M.
    Koltun, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/191552.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    microbial gas
    thermogenic gas
    source rocks
    hydrocarbon potential
    organic geochemistry
    prospectives of hydrocarbon exploration
    autochthonous Miocene strata
    Bilche-Volytsia Unit
    Carpathian Foredeep
    SW Poland
    Western Ukraine
    Opis:
    Molecular composition of natural gases accumulated in autochthonous Miocene strata of the Polish and Ukrainian Carpathian Foredeep is dominated by methane, which usually constitutes over 98 vol%. Methane was generated by the carbon dioxide reduction pathway of microbial processes. Ethane was generated both during microbial and thermogenic processes ("oil window") and propane at the initial stage of the low-temperature thermogenic processes, and also by the microbial processes. The rhythmic and cyclic deposition of Miocene clays and sands as well as the vigorous generation of microbial methane caused that the gas produced in claystone beds was accumulated in the overlaying sandstones, and capped, in turn, by the succeeding claystones. Such generation and accumulation system of microbial gases gave rise to the formation of multi-horizontal gas fields. Analysis of the distribution of immature humic dispersed organic matter in the Upper Badenian and Lower Sarmatian sequences indicates that it is practically homogeneous. A migration range of microbial gases was insignificant and locations of their accumulations would depend only on the existence of proper type of traps (compactional anticlines situated above basement uplifts, sealed by the Carpathian Overthrust and/or by faults; stratigraphic pinching out and stratigraphic traps related to unconformities). Another situation is encountered in the south, beneath the Carpathian Overthrust. The thickness of the autochthonous Miocene strata in this area is more than 1,500 metres. Geochemical studies reveal that from a depth of 2,500 metres starts the process of low-temperature thermogenic hydrocarbon generation (“oil window”). At greater depths, more than 7,500 metres, within the autochthonous Lower Miocene basin only the high-temperature methane ("gas window") could be produced and accumulated.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 523-548
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Origin and maturity of oils in the Ukrainian Carpathians and their Mesozoic basement
    Autorzy:
    Więcław, D.
    Kotarba, M. J.
    Kowalski, A.
    Koltun, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058970.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ukrainian Carpathians
    Carpathian Foredeep
    biomarkers
    stable carbon isotopes
    Opis:
    Geochemical characteristics of 25 oils collected from Skiba Unit of the Outer Carpathians, Boryslav-Pokuttya Unit of the Carpathian Foredeep and their Mesozoic basement in the western Ukraine are presented in the paper. The first recognised oil family consists of almost all oils accumulated in the flysch sequence of the Outer Carpathians and the Carpathian Foredeep which have very similar geochemical characteristics. These oils were generated from Type II or II/III kerogen deposited in clastic sediments. They are low-sulphur and migrated short distances. Slight biodegradation processes are visible only in oils accumulated in shallow deposits in the Skiba Unit. Their source rocks are the Oligocene Menilite Shales from the Boryslav-Pokuttya Unit. Oils from the Kokhanivka and Orkhovychi deposits (the Mesozoic basement of the Carpathian Foredeep) constitute the second family. These oils are extremely heavy, high-sulphur and were generated from high-sulphur Type IIS kerogen deposited in the carbonate environment. The most probable source rocks for these oils are the Upper Jurassic strata. Oil collected from the Vola Blazhivska deposit (the Boryslav-Pokuttya Unit) shows intermediate parameters between the oil families described above. It is characterized by the presence of oleanane and high sulphur content. It was generated from the Menilite Shales containing high-sulphur kerogen. All oils were generated at an early stage or the peak of oil window.
    Źródło:
    Geological Quarterly; 2012, 56, 1; 158-168
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Origin and migration of oil from the Ukrainian Outer Carpathians to their Mesozoic basement: a case of Lopushna traps
    Autorzy:
    Radkovets, N. Y.
    Kotarba, M.
    Koltun, Y.
    Kowalski, A.
    Kosakowski, P.
    Więclaw, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060167.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ukrainian Carpathians
    Lopushna oil field
    oil origin
    biomarkers
    stable carbon isotopes
    migration pathways
    Opis:
    Lopushna oil field has been discovered in Mesozoic-Paleogene strata of the platform basement under the Ukrainian Outer (Flysch) Carpathians. Oils from two main accumulations, occurring in the Upper Cretaceous sandstone and Upper Jurassic limestone reservoirs, have been analysed in order to identify their origin and relation to the known petroleum systems in the region of the Outer Carpathians and the basement of the Carpathian Foredeep. Results of geochemical investigations of oils, including biomarker and isotopic data, show a good correlation with oils, accumulated in the Carpathian flysch strata. Oils are low-sulphur and did not undergo significant degradation. They were generated from Type II or II/III kerogen, deposited in anoxic environments in clastic sediments. Generation occurred at the peak of “oil window”, probably in the temperature range of 122 to 126oC. The presence of oleanane indicates the Cretaceous or younger source rocks. Good correlation on biomarker and isotopic data with the organic matter dispersed in Oligocene Menilite Beds, occurring at the top of the Carpathian flysch succession, allowed authors to identify them as source rocks for oils of the Lopushna field, which thus can be regarded as an oil family of the Outer Carpathians. The migration distance for both Lopushna oils and oils accumulated in the Carpathian flysch strata was similar. A number of sub-vertical dislocations, on which the subsided flysch strata occur at the same depth level with the Jurassic and Cretaceous rocks of the platform, can be assumed as possible migration pathways from the mature source rocks of the Oligocene Menilite Beds of Boryslav-Pokuttya, Skyba or Krosno units to the Lopushna type traps, which suggests the possibility of existence of other hydrocarbon accumulations of this type. The Lopushna field so far is unique containing this type of oil found in the basement of the Ukrainian Carpathian Foredeep.
    Źródło:
    Geological Quarterly; 2016, 60, 1; 133--148
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Origin of natural gases in the autochthonous Miocene strata of the Ukrainian Carpathian Foredeep and its Mesozoic basement
    Autorzy:
    Kotarba, M. J.
    Koltun, Y. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/191381.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    microbial gases
    thermogenic gases
    stable carbon isotopes
    stable hydrogen isotopes
    carbon dioxide
    nitrogen
    Miocene strata
    Mesozoic strata
    Opis:
    Methane concentrations in natural gases accumulated in the Lower and Upper Badenian and Lower Sarmatian reservoirs of the Bilche-Volytsia Unit in the western part of the Ukrainian Carpathian Foredeep usually exceed 96 vol%. Methane was generated by microbial reduction of carbon dioxide in the marine environment. Microbial methane and ethane were produced mainly during sedimentation of Miocene clays and muds. It is possible that this microbial process continues today. Higher light hydrocarbons (ethane in part, and mainly propane, butanes and pentanes) were generated during the diagenesis and the initial stage of the low-temperature, thermogenic processes from Type III and III/II kerogen deposited in Miocene strata and/or Middle and Upper Jurassic basement rocks. Limited variations in the values of geochemical hydrocarbon indices and stable isotope ratios of methane, ethane and propane with the depth indicate similar gas generation conditions within the whole Miocene succession. The microbial gases (methane and partly ethane) generated during microbial processes within the Miocene strata later migrated to the Upper Jurassic and the Upper Cretaceous (Cenomanian) reservoirs of the Mesozoic basement, and to the bottommost Lower Badenian reservoirs of the analysed Letnia, Orkhovychi, Rudky and Vereshchytsia fields. The low hydrogen concentrations within the Miocene strata as well as within the Upper Jurassic and the Upper Cretaceous (Cenomanian) reservoirs of the Mesozoic basement, and within the bottommost Lower Badenian reservoirs are also related to microbial processes. Carbon dioxide and nitrogen, which are common minor constituents, were generated by both microbial and low-temperature thermogenic processes. Moreover, CO2 also underwent secondary processes, mainly dissolution in water, during migration. At least part of the nitrogen accumulated in the Rudky field, which is remarkably high in N2 (96.9 vol%), is probably of atmospheric origin and was introduced to the reservoir by secondary recovery methods.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 425-441
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petroleum systems in the Palaeozoic–Mesozoic basement of the Polish and Ukrainian parts of the Carpathian Foredeep
    Autorzy:
    Kotarba, M. J.
    Więcław, D.
    Kosakowski, P.
    Wróbel, M.
    Matyszkiewicz, J.
    Buła, Z.
    Krajewski, M.
    Koltun, Y. V.
    Tarkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/191548.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    source rock oil-gas correlations
    petroleum system
    generation and expulsion areas
    Palaeozoic–Mesozoic basement
    Carpathian Foredeep
    Polska
    Ukraine
    Opis:
    Comprehensive geochemical analyses (Rock-Eval pyrolysis, stable carbon isotopes, biomarkers and aromatic hydrocarbons and elemental composition of kerogen) provide an explanation of genetic relationships between dispersed organic matter in various source rock horizons of the Palaeozoic–Mesozoic basement in the Carpathian Foredeep and also the liquid (oils and condensates) and gaseous hydrocarbons accumulated in reservoirs in the area between Kraków and Ivano-Frankivs’k. The study region was divided into seven zones around oil, condensate and gas deposits for detailed determination of genetic oil – natural gas – source rock correlation. Based on source, reservoir, seal and overburden rocks, generation, expulsion, migration and accumulation of hydrocarbons and trap formation along with 1-D and 2-D modelling, two separated petroleum systems of the Palaeozoic–Mesozoic strata were established. One petroleum system occurs in the western part of the Małopolska Block, the second one in the eastern part of the Małopolska Block and western part of the Kokhanivka Zone (south-eastern Poland – western Ukraine). In addition, nine generation and expulsion areas were identified. The comparison of the two petroleum systems reveals that the western part of the Małopolska Block has considerably greater prospects for oil and gas exploration than the eastern part of the Małopolska Block and the western part of the Kokhanivka Zone.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 487-522
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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