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Wyszukujesz frazę "thermal maturity" wg kryterium: Temat


Tytuł:
Analiza osadów ilasto-mułowcowych w Polsce pod kątem możliwości występowania w nich niekonwencjonalnych nagromadzeń gazu ziemnego
Analysis of shale gas potential of siltstone and mudstone formations in Poland
Autorzy:
Poprawa, P.
Powiązania:
https://bibliotekanauki.pl/articles/2062677.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
zawartość TOC
dojrzałość termiczna
gaz w łupkach
TOC contents
thermal maturity
shale gas
Opis:
Analizowano formacje ilasto-mułowcowe o podwyższonej zawartości węgla organicznego w basenach sedymentacyjnych w Polsce pod kątem możliwości występowania w nich gazu ziemnego. Wysoki stopień deformacji tektonicznych łupków menilitowych w Karpatach zewnętrznych, a w mniejszym stopniu również łupków karbonu dolnego w strefie monokliny przedsudeckiej, ogranicza możliwość eksploatacji z nich gazu ziemnego. Osady ilasto-mułowcowe mioceńskiego zapadliska przedkarpackiego są nieperspektywiczne dla występowania gazu ziemnego w łupkach z uwagi na niską zawartość TOC oraz niski stopień konsolidacji. Osady ilasto-mułowcowe od najwyższej jury do najniższej kredy, jury dolnej i środkowej oraz retyku w basenie polskim, a także dolnopermskie łupki antrakozjowe i walchiowe w niecce śródsudeckiej charakteryzują się ogólnie zbyt niską dojrzałością termiczną do powstania złóż gazu. Górnopermskie łupki miedzionośne oraz ilasto-margliste odmiany facjalne dolomitu głównego w basenie polskim mają zbyt małą miąższość. Niska dojrzałość termiczna cechuje także łupki występujące w obrębie górnokarbońskich basenów węglowych, tj. w basenie lubelskim oraz we wschodniej części basenu górnośląskiego. W obu basenach brak jest ponadto homogenicznych kompleksów iłowcowych o dużej miąższości. Łupki w obrębie utworów najwyższego dewonu i najniższego karbonu na Pomorzu Zachodnim charakteryzują się stosunkowo niską zawartością węgla organicznego. Największe prawdopodobieństwo występowania gazu ziemnego stwierdzono dla łupków syluru dolnego i ordowiku górnego na kratonie wschodnioeuropejskim. Dolnokarbońskie łupki w obrębie utworów kulmowych strefy wielkopolskiej w rejonie monokliny przedsudeckiej stanowią drugorzędny cel prac poszukiwawczych.
Shale gas potential of organic rich claystone and mudstone formation from the sedimentary basins in Poland was analyzed. Intensive tectonic deformation of the Outer Carpathian Menilite shale, as well as their often low thermal maturity, are limits for shale gas exploration. To a lesser degree this is truth also for the Lower Carboniferous shale in the Wielkopolska zone (SW Poland). Claystone and mudstone in the Miocene foredeep basin of Carpathians are not consolidated and have too low TOC. The uppermost Jurassic to lowermost Cretaceous shale and the Lower and Middle Jurassic shale in the Polish Basin, as well as the Lower Permian Antracosia and Walchia shale in the Intra-Sudetic basin, are generally characterized by too low thermal maturity for gas generation. Thickness of the Upper Permian Copper shale as well as the Upper Permian Main Dolomite in shaly and marly development is too low to be considered as shale gas targets. Low thermal maturity is characteristic also for the Upper Carboniferous shale in the Lublin basins, and in the eastern part of the Upper Silesian Basin. Both the basins lack thick homogenous shale formation. The uppermost Devonian to lowermost Carboniferous shale in the Western Pomerania is characterized by too low TOC contents. The highest potential of shale gas exploration is related to the Upper Ordovician and/or Lower Silurian graptolitic shale at the East European Craton. The Lower Carboniferous shale in the Fore-Sudetic Monocline area is regarded as a secondary target.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (1); 159--172
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomarkery, Tmax oraz refleksyjność witrynitu jako wskaźniki dojrzałości termicznej materii organicznej w skałach osadowych – korelacje i zakres stosowalności
Biomarkers, Tmax and vitrinite reflectance as organic matter thermal maturity indices in sedimentary rocks – correlations and scope of applicability
Autorzy:
Bieleń, W.
Matyasik, I.
Powiązania:
https://bibliotekanauki.pl/articles/1835259.pdf
Data publikacji:
2018
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
dojrzałość termiczna
materia organiczna
refleksyjność witrynitu
biomarkery
thermal maturity
organic matter
vitrinite reflectance
biomarkers
Opis:
Niniejsza praca przedstawia zależności między różnymi wskaźnikami określającymi stopień dojrzałości termicznej materii organicznej. W badaniach wykorzystano pomiar refleksyjności witrynitu (Ro), pomiar Tmax z analizy Rock-Eval, molekularne wskaźniki dojrzałości otrzymane z analizy GC-MS frakcji nasyconej i aromatycznej ekstrahowanej substancji organicznej. Wzięto pod uwagę próbki zawierające witrynit, a także takie, które w składzie (głównie próbki dolnopaleozoiczne) zawierały macerały witrynitopo- dobne lub bituminit. Wykonano analizę korelacyjną między wskaźnikami stopnia dojrzałości dla próbek fliszu karpackiego oraz próbek reprezentujących utwory syluru i ordowiku oraz kambru górnego. Wyniki tych badań przedstawiono w postaci diagramów korelacyjnych oraz tabel korelacyjnych z obliczonymi współczynnikami korelacji.
This study was aimed to determine the relationship between the various thermal indices determining the degree of organic matter maturity. In the correlation studies, vitrinite reflectance Ro, Tmax parameter from Rock-Eval analysis and indicators calculated obtained from the from the GCMS analysis data of aromatic and saturated fractions were used. For these studies samples containing macerals of vitrinite as well as samples containing vitrinite-like macerals in their composition were taken into account. An analysis of the relationship between indicators of the degree of maturity for samples representing: flysch Carpathian and for Silurian, Ordovician and Cambrian rocks was done. The results of these studies are presented in the form of correlation diagrams and tables with calculated correlation coefficients.
Źródło:
Nafta-Gaz; 2018, 74, 8; 575-583
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burial and thermal history of the Lower Palaeozoic petroleum source rocks at the SW margin of the East European Craton (Poland)
Autorzy:
Botor, Dariusz
Golonka, Jan
Anczkiewicz, Anneta A.
Dunkl, István
Papiernik, Bartosz
Zając, Justyna
Guzy, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/191816.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
maturity modelling
shale gas
shale oil
burial history
thermal history
Palaeozoic
East European Craton
Opis:
Thermal maturity modelling was carried out in over sixty wells along the SW margin of the East European Craton (EEC). The burial and thermal history modelling of the EEC, using thermochronological data, allowed the construction of burial history maps showing its geological development in the Phanerozoic. These results have proved that the Ordovician and Silurian source rocks occurring at the SW margin of the EEC reached a maximum palaeotemperature in the Palaeozoic, mainly during Devonian-Carboniferous time and at the latest during the Silurian in the most westerly part of this margin, along the Teisseyre-Tornquist Zone. In Mesozoic and Cainozoic time, the Ordovician and Silurian strata generally were subjected to cooling or to very minor heating, certainly below the Variscan level. The maximum burial and maximum temperature of the Ediacaran-Lower Palaeozoic strata were reached during the Early Carboniferous in the Baltic Basin and during the Late Carboniferous in the Lublin area, and even in the Early Permian in the SE corner of the Lublin Basin. Thus, the main period of maturation of organic matter and hydrocarbon generation in the Ordovician and Silurian source rocks was in the Late Palaeozoic (mainly Devonian-Carboniferous) and in the westernmost zone along the Teisseyre-Tornquist line at the end of the Silurian.
Źródło:
Annales Societatis Geologorum Poloniae; 2019, 89, 2; 121-152
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burial and thermal history of the Polish part of the Baltic region
Autorzy:
Wróbel, M.
Kosakowski, P.
Poprawa, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059073.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Baltic Region
northern Poland
subsidence
burial history
thermal evolution
maturity modelling
Opis:
The burial history and thermal evolution of the western part of the Baltic region was reconstructed by means of 1-D modelling for eight boreholes penetrating the lower Paleozoic succession. The Neoproterozoic rifting presumably caused elevation of heat flow, while Cambrian to Mid Ordovician post-rift thermal sag of the Baltica passive margin led to systematic decrease of heat flow with time. Development of the Late Ordovician to Silurian flexural foredeep of the Caledonide collision zone was associated with intensive subsidence, a high rate of sediment deposition and rapid burial of the Upper Cambrian and/or Tremadocian, Upper Ordovician and lower Silurian source rocks, presumably sufficient for the early stage of oil generation. After post-Caledonian Early Devonian uplift, the western Baltic region was subject to Early Devonian to early Carboniferous subsidence and deposition, leading to further burial of the source rocks. Together with elevated heat flow, characteristic of the Variscan broad foreland, this caused further source rocks maturation and hydrocarbon generation. Late- to post-Variscan uplift and erosion (late Carboniferous to late Permian) resulted in complete removal of the Middle Devonian to lower Carboniferous strata and development of the major regional unconformity. During late Permian to Cretaceous time the western part of the Baltic region constituted an eastern flank of the Polish Trough, with the main phases of subsidence and burial during late Permian-Early Triassic time, related to rifting in the Polish Trough, and during Late Cretaceous time, related to the compressional regime. Maturity profiles in boreholes from the vicinity of the studied boreholes indicate the presence of a late Mesozoic (Late Cretaceous?) positive thermal event, causing further maturation of the source rock.
Źródło:
Geological Quarterly; 2010, 54, 2; 131-142
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative petrography and organic geochemistry of different types of organic matter occurring in the Outer Carpathians rocks
Autorzy:
Zielińska, Magdalena
Fabiańska, Monika
Więcław, Dariusz
Misz-Kennan, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2058565.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polish Outer Carpathians
redeposited organic matter
organic matter petrography
thermal maturity
biomarkers
Rock-Eval
Opis:
The characterization of organic matter (OM) in sedimentary rocks is important in many types of biological, geological and environmental research. The integrated use of microscopy and geochemistry, as here, is particularly useful in any attempt to define the origin and evolution of OM in sedimentary basins. The organic petrography and geochemistry different types of allogenic and authigenic OM from the Polish Outer Carpathian (POC) rocks were studied in present study to compare their genetic type, thermal maturity, depositional environment and post-sedimentation processes. Special attention was paid to redeposited coal clasts occurrences. The used techniques show differences in organic matter type originating from various sources. The organic petrography analysis shows that redeposited coal clasts (CC) and terrigenous organic matter (TOM) are composed predominantly of woody material (the gas-prone Type-III kerogen). Similar results were obtained during the Rock-Eval pyrolysis. Moreover, the GC-MS analysis of extracts indicated the additional source of OM, namely planktonic organic matter (POM) with oil-prone kerogen Type-I or II. This OM is in some cases high thermally mature and could potentially has allochthonous origin. The n-alkane, saturated and aromatic biomarker data revealed deposition of this POM in anoxic deltaic or close-shore sedimentary environments whereas the redeposited coal clasts were probably originally deposited in coal swamps as were the Upper Silesian bituminous coals.
Źródło:
Geological Quarterly; 2020, 64, 1; 165--184
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)
Autorzy:
Aleksić, Nikoleta
Kostić, Alaksandar
Radonjić, Miloš
Powiązania:
https://bibliotekanauki.pl/articles/2055865.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
petroleum
Rock-Eval
vitrinite reflectance
maceral
thermal maturity
Opis:
This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic matter in the area and thermal maturity stages from immature (Cenozoic) to early mature (Mesozoic). Vitrinite is abundant in the samples analysed, with the exception of Cretaceous samples that contain mostly lamalginite and bituminite. While measured vitrinite reflectance in end-member samples (Triassic shale 0.78 % Rr and Neogene coal 0.34% Rr) are in good correlation with the T max parameter from Rock-Eval pyrolysis. T max generally shows lower values in most Mesozoic samples. The organic petrographic data indicate that specific kerogen in Cretaceous and some Triassic sedimentary rocks is a probable reason for the significantly lower T max values. In addition, the results of pyrolysis documented before and after extraction revealed that free hydrocarbons (bitumen) in the surface samples analysed suppress the T max values.
Źródło:
Annales Societatis Geologorum Poloniae; 2021, 91, 4; 375--388
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dystrybucja biomarkerów i dojrzałość termiczna materii organicznej w tonsteinie i węglu kamiennym z pokładu 385/2 z kopalni Bogdanka (Lubelskie Zagłębie Węglowe)
Biomarkers distribution and thermal maturity of organic matter w tonsteinie i węglu kamiennym z pokładu 385/2 z kopalni Bogdanka "Bogdanka" mine (Lublin Coal Basin)
Autorzy:
Gola, M. R.
Karger, M.
Gazda, L.
Powiązania:
https://bibliotekanauki.pl/articles/2074840.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Lubelskie Zagłębie Węglowe
tonstein
biomarkery
dojrzałość termiczna materii organicznej
Lublin Coal Basin
biomarkers
thermal maturity of organic matter
Opis:
The paper presents results of geochemical analyses of organic matter (OM) in a tonstein bed and surrounding bituminous coal from the Upper Carboniferous (Westphalian B) coal seam no. 385/2 from the Bogdanka mine, Lublin Coal Basin. In all studied samples, including those of tonstein and bituminous coal, OM was found to be very similar in composition. Distribution of hydrocarbons in investigated rocks is characterized by strong predominance with odd-number carbon-atom of the long-chain n-alkanes in comparison to the even-number and high concentration of C29 steranes, what implies relatively high input of higher-plant OM in these samples. Minor concentration of C28 steranes and perylene points at presence of fungi. In all extracts, the tri- and tetracyclic diterpanes co-occur with their aromatized derivatives, what suggests presence of the tap resin species - precursors of the conifer families in the plant community. The abundance of sesquiterpanes, pentacyclic triterpanes and benzohopanes indicates a significant bacterial input, most possibly connected with bacterial activity after deposition of terrestrial OM. The original material of tonstein was pyroclastic in orgin, and deposited directly on plants living at the surface of a mire. That material hadn’t had any direct influence on chemicalOMtransformation. The biomarker data, both for coals and tonstein, reveals that sedimentary organic matter was heated up to a temperature corresponding to the level of immature/start of oil window. On the other hand, the increase in thermal maturity value, based on distribution of the aromatic hydrocarbons in organic matter in tonstein (theoretical vitrinite values - Rc, Rcs) are probably due to the presence of incompletely burned organic remains (charcoals), transported to the sedimentary basin along with volcanic ashes.
Źródło:
Przegląd Geologiczny; 2011, 59, 12; 777-784
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation, based on the maturity function, of the strength of early age concrete cured at elevated temperature
Szacowanie wczesnej wytrzymałości betonu dojrzewającego w podwyższonej temperaturze na podstawie funkcji dojrzałości
Autorzy:
Wawrzeńczyk, J.
Lech, M.
Powiązania:
https://bibliotekanauki.pl/articles/402511.pdf
Data publikacji:
2015
Wydawca:
Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:
precast concrete
thermal curing
maturity function
compressive strength
beton prefabrykowany
utwardzanie termiczne
funkcja dojrzałości
wytrzymałość na ściskanie
Opis:
In mass production of concrete precast units, it is important to optimise technology which would ensure high early age compressive strength of concrete, and also follow the principles of sustainable manufacturing and reduce costs. The paper presents the analysis of results obtained for three series of concretes made from CEM I42.5R cement, at the water-cement ratios of 0.34, 0.38, and 0.42, cured at different temperatures, namely 20, 40 and 60°C, where heating was performed in 16-hour cycle. The analysis aimed at determining functional properties which allow the estimation of concrete compressive strength depending on the temperature history. The Carino-Lew function was adopted to determine the relation between the curing time and temperature and the equivalent curing time te. The determined values of cement thermal sensitivity factor ranged 0.023÷0.040, which was related to the w/c ratio and the strength level. An exponential function was developed to express concrete compressive strength dependence on the equivalent curing time te. In the authors’ opinion, the function can contribute to the optimisation of the production process of concrete precast units by means of designing the temperature profile, depending on the concrete mix formulation and the assumed level of concrete structural strength.
Źródło:
Structure and Environment; 2015, 7, 3; 123-131
2081-1500
Pojawia się w:
Structure and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ewaluacja sweet spotów w polskich formacjach łupkowych w odniesieniu do wybranych parametrów geochemicznych
Evaluation of sweet spots in Polish shale formations in relation to the selected geochemical parameters
Autorzy:
Matyasik, Irena
Janiga, Marek
Spunda, Karol
Powiązania:
https://bibliotekanauki.pl/articles/1834245.pdf
Data publikacji:
2020
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
sweet spot
substancja organiczna
dojrzałość termiczna
gaz z formacji łupkowych
skład izotopowy
organic matter
thermal maturity
shale gas
isotopic composition
Opis:
The article focuses on the geochemical parameters of key importance to the assessment of the hydrocarbon potential of shale formations (the content of organic matter and its thermal maturity and degree of transformation). A comparative analysis of the measurements of gas obtained in the process of core desorption with the analysis of saturations obtained from Rock-Eval pyrolysis was performed. Percentage of retained free hydrocarbons in source levels at the calculated generation was determined. Large discrepancies were observed between the measured reflectance values of vitrinite-like macerals or on zooclasts and the calculated VR values from the Tmax parameter. This means limited applicability and universality of Jarvie formula (Wüst, 2013). A new conversion formula was calculated based on a large sample population. Additionally, the article presents the results of isotopic composition analyzes. Large differences in the δ13C methane, ethane and propane values were stated between the wells. The content of higher hydrocarbons in the gas composition is very high, which may indicate thermogenic origin. Most samples are oil-related gas and mixed gas, one sample is condensate related gas (Peters chart). The gas generation from both wells corresponds to the range of the oil window to the beginning of the gas window (VR from about 0.6 to about 1.35%) (Peters et al., 2005). In addition, using data from degasification experiments (total gas quantities) and pyrolysis parameters obtained from Rock Eval analyzes (Tmax and TOC), it was found that the correlation between the maturity of the source organic matter (determined on the basis of Tmax) and the amounts of gas is small (r = 0.37 for total gas). In contrast, the correlation between the organic carbon content (TOC) and the amounts of gas is high for total gas (r = 0.70).
Źródło:
Nafta-Gaz; 2020, 76, 2; 76-90
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical characteristics, thermal maturity and source rock potential of the Oligocene Šitbořice Member of the Menilite Formation in the Ždánice Unit (Czech Republic)
Autorzy:
Jirman, P.
Geršlová, E.
Pupp, M.
Bubík, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060076.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Šitbořice Member
Menilite Formation
Outer Flysch Carpathians
source rock potential
thermal maturity
organic petrography
Opis:
Rocks deposited in the Oligocene Paratethys are recognized as one of the most important source rocks in the Flysch Carpathians. The Šitbořice Member (uppermost NP23 to lowermost NP25 zone) represents the upper part of the Menilite Formation in the Outer Flysch Carpathians of the Czech Republic. This paper presents results of bulk geochemical analysis, Rock-Eval pyrolysis and organic petrography. The geochemical evaluation, source rock potential, kerogen type and thermal maturity were studied using borehole cores. Based on the classification of Peters (1986), the evaluated Šitbořice Member is mostly classified as a “very good” source rock according to TOC and variable, mostly “poor” to “good” according to the petroleum potential. However, the average petroleum potential value assigned the member to “good” source rock which is in accordance with the TOC classification if the “live” TOC is used. A comparable distribution between kerogen type II and III has been indicated by HI. Unlike this, the organic petrography observations show the organic matter belongs to the kerogen type II which corresponds to the relationship of residual hydrocarbon potential versus TOC and HI calculated based on “live” organic carbon. Presumed immaturity was confirmed by Rr and Rock-Eval Tmax. Oxygen-restricted conditions ora dysoxic environment have been indicated by the TOC/TS ratio.
Źródło:
Geological Quarterly; 2018, 62, 4; 858--872
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical interpretation and comparison of biomarker composition of bitumens obtained from coals and surrounding rocks
Autorzy:
Matuszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1204922.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
coal
coal shales
bitumens
biomarkers
GC-MS
thermal maturity
Opis:
The bitumens obtained as the extraction products from a series of coals and surrounding rocks samples were fractionated onto aliphatic, aromatic and polar fractions. Aliphatic and aromatic fractions were then submitted to analysis using modern gas chromatography - mass spectrometry method. The distribution of n-alkanes was compared and parameters values characterising conditions of sedimentation and type of primary organic matter were calculated. In aliphatic fractions, a series of biomarkers was also identified as steranes, diasteranes, tricyclic diterpanes, hopanes and moretanes. The relatively high content of diasteranes was observed in the bitumens from shales bordering on coals. It confirms the literature data indicating possibility of catalytic influence of claystones on arrangement of steranes to diasteranes. The values of parameters calculated from the data characterising distribution of hopanes have indicated a possibility of generation of oils by some of analysed coals: flame as well as orthocoking coals.The aromatic compounds were also identified, mainly phenanthrenes being an important stage of aromatisation process of fossil organic matter.The comparison of characteristics of bitumens obtained from coals and surrounding rocks suggests a possibility of migration of various groups of organic compounds from coal layers to rocks bordering on them. The migration of organic mobile matter seems to be as well a result of a great difference of concentration between coal and surrounding rocks layers as of action of circulating waters or hydrothermal solutions. The temperature gradient and local intrusive bodies are of great significance for processes of oil migration. The examinations and conclusions presented in this work should be, however, taken as the introductory ones and have to be confirmed by analysis of a greater number of samples of various geological characteristics.
Źródło:
Polish Geological Institute Special Papers; 2002, 7; 169-180
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrocarbon generation modelling in the Permian and Triassic strata of the Polish Basin: implications for hydrocarbon potential assessment
Autorzy:
Botor, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/31342965.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
hydrocarbon potential
kerogen transformation ratio
thermal maturity modelling
Polish Basin
Permian
Triassic
Opis:
Hydrocarbon generation in the Zechstein Main Dolomite and Upper Triassic potential source rocks of the Polish Basin was investigated by 1-D thermal maturity modelling in 90 boreholes across the basin. This identified major zones potentially worthy of further exploration efforts. The maximum burial depth of the Zechstein Main Dolomite and Upper Triassic reached >5 km during the Late Cretaceous leading to maximum thermal maturity of organic matter. Hydrocarbon generation development reveals considerable differences between particular zones of the Zechstein Main Dolomite and Upper Triassic. The kerogen transformation ratio (TR) in the Zechstein Main Dolomite reached values approaching 100% along the basin axis. The TR in the Upper Triassic source rocks is generally lower than in the Zechstein Main Dolomite due to lesser burial. The Upper Triassic source rocks have the highest TR values (>50%) along the basin axis, in the area between boreholes Piła IG 1 and Piotrków Trybunalski IG 1, with the most pronounced zone in the Krośniewice Trough (i.e., between the Krośniewice IG 1 and Budziszewice IG 1 boreholes), where the TR reached >90%. The Zechstein Main Dolomite and Upper Triassic entered the oil window in the Late Triassic to Early–Middle Jurassic, respectively. Hydrocarbon generation continued until the Late Cretaceous, and was completed during tectonic inversion of the basin.
Źródło:
Geological Quarterly; 2023, 67, 2; art. no. 20
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrothermal fluids influence on the thermal evolution of the Stephanian sequence, the Sabero Coalfield (NW Spain)
Autorzy:
Botor, D.
Powiązania:
https://bibliotekanauki.pl/articles/184440.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Spain
Cantabrian Mountains
Sabero coalfield
Carboniferous
pull-apart basin
coalification
thermal history
maturity modelling
vitrinite reflectance
eroded overburden
Opis:
In the present study, the thermal history of the Late Carboniferous (Stephanian) coal-bearing sediments of the Sabero Coalfield has been reconstructed in order to elucidate coal rank. The Sabero Coalfield is located in a small intramontane coal-bearing basin along the Sabero-Gordón fault zone, one of the major E-W trending strike-slip fault systems of the southern part of the Cantabrian Zone (NW Spain). The total thickness of the Stephanian succession is in excess of 2,000 m, and is composed of siliclastic rocks and intercalated coal seams with tonsteins. Mean vitrinite reflectance values in the Stephanian rocks in the Sabero Coalfield are in the range from 0.61 to 3.14% Rr, but most values are in the range from 0.8 to 1.5% Rr (based on 84 samples). Average vitrinite reflectance gradient is high (0.73% Rr/km), which suggests high value of average paleogeothermal gradient (52°C/km). The maximum paleotemperatures calculated from vitrinite reflectance values for the Stephanian rocks range between 89°C (top of the Stephanian) and 195°C (bottom of the Stephanian). Coalification of the organic matter in the Stephanian rocks was achieved in the Early Permian, and was most likely related to several almost simultaneous related to magmatic and hydrothermal activity during high subsidence period in the pull-apart basin. The primary, burial-related maturity pattern, was probably slightly overprinted by fluid migration event, which is supposed to have occurred in Early Permian time.
Źródło:
Geology, Geophysics and Environment; 2012, 38, 4; 369-393
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Organic-matter vitrinite reflectance variability in the Outer Carpathians, Poland : relationship to tectonic evolution
Autorzy:
Zielińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060360.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Outer Carpathians
organic matter
thermal maturity
vitrinite reflectance
Opis:
Random vitrinite reflectance of allochthonous plant material varies throughout all the flysch sedimentary units of the Outer Western Carpathians. The vitrinite reflectance of coalified phytogenic matter is variable even within the same lithostratigraphic unit. There is no clear relationship between random vitrinite reflectance and stratigraphy (age of particular strata) within surface samples. The typical pattern of increasing random reflectance with depth in boreholes is unsettled by Rro “jumps” which occur within folds and overthrusts. However, this study revealed a trend of increasing random vitrinite reflectance from north to south in the area of the Magura Unit. A compressional regime involving phases of uplift and burial, varying from place to place in the flysch basin, was the main factor influencing coalification. The initial maturity of organic matter transported to the marine environment was a secondary factor. A degree of coalification had occurred in the flysch sediments prior to the main stage of fold-and-thrust movements associated with the phase of maximum tectonic subsidence at the end of the Eocene. It is generally assumed that coalified plant material dispersed in sedimentary rocks experienced the same physical and chemical changes as those in larger accumulations of coal. Coalification of phytogenic material coeval with flysch in the Outer Carpathians corresponds to the interval from sub-bituminous to low-medium-rank bituminous coal.
Źródło:
Geological Quarterly; 2017, 61, 1; 214--226
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palynofacies analysis, sedimentology and hydrocarbon potential of the Menilite Beds (Oligocene) in the Slovakian and Romanian Outer Carpathians
Autorzy:
Filipek, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2060248.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Menilite Beds
palynofacies
UV fluorescence
thermal maturity
Carpathians
Opis:
The sedimentary organic matter (SOM) assemblages and sedimentology of the Menilite Beds from the Dukla, Grybów and Vrancea units in the Slovakian and Romanian Outer Carpathians are described. Qualitative and quantitative analyses of the SOM help ascertain depositional conditions, while the thermal maturity of the organic matter studied is estimated utilizing the Spore Colour Index and UV light excitation techniques. The sedimentary organic particles were grouped into ten SOM categories: marine palynomorphs (dinoflagellate cysts), sporomorphs (saccate and non-saccate, pollen and spores), freshwater algae (Botryococcus sp., and other freshwater microplankton), phytoclasts (cuticles, translucent wood, opaque wood), resin and amorphous organic matter (AOM). All samples are dominated by AOM. The presence of Botryococcus sp., Pediastrum sp., Pterospermella sp. and Campenia sp., in some samples points to deposition under hyposaline conditions. It is interpreted that the freshwater influx induced water column stratification in the basin, leading to the development of dysoxic to anoxic bottom-water conditions that enhanced the preservation of AOM. Kerogen analysis in UV light and evaluation using the Spore Colour Index demonstrated different thermal maturation patterns from the Slovakian (post-mature) and Romanian (immature) sections. Integrated palynofacies analysis (notably, the presence of freshwater algae) and sedimentological observations (e.g., hummocky cross-stratification) lead to the conclusion that the deposition of the Menilite Beds in the Vrancea Unit (Romania) was relatively proximal to the shoreline, above storm wave base, whereas the Slovakian units (Dukla and Grybów) were deposited in a more distal setting.
Źródło:
Geological Quarterly; 2020, 64, 3; 589--610
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł

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