Wyniki wyszukiwania - Biblioteka Nauki

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Charakterystyka petrofizyczno-mineralogiczna wyznaczonych perspektywicznych kompleksów węglowodorowych na podstawie wybranych wyników badań laboratoryjnych

100%

Dyrka I.

Przegląd Geologiczny

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2016

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tom Vol. 64, nr 12

982--986

EN

This article hasbeen prepared based on the chapter devoted to research of petrophysical properties of shale and tight sandstones within the project: “Identification of prospective zones for unconventional hydrocarbon accumulations in Poland, stage I.” Petrophysical and mineralogical characterization of particular prospective complexes in the Baltic, Podlasie-Lublin basin and the Carboniferous basin of south-western Poland (Fore-Sudetic Homocline basement), is based on selected laboratory tests of rocks, performed by the Oil and Gas Institute – NRI in Kraków. These analyses included investigations of total porosity and effective porosity, helium porosity, total permeability, silica content, clay content and cumulative content of quartz, and feldspars and carbonates. For particular complexes mean values of individual parameters were calculated. Then, an assessment was made to find out whether they meet the established criteria and whether the results correlate with each other in the boreholes across each area.

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Ordovician-Silurian shale gas resources potential in Poland : evaluation of Gas Resources Assessment Reports published to date and expected improvements for 2014 forthcoming Assessment

63%

Kiersnowski H. , Dyrka I.

Przegląd Geologiczny

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2013

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tom Vol. 61, nr 11-1

639--656

EN

The paper comprises a brief history and results of Assessment Reports of shale gas resources for the Polish Ordovician-Silurian Basin. The Reports have been confronted in the context of used criteria of assessing. The comparison shows that the early, most optimistic assessments (Wood Mackenzie, ARI & EIA) were based on very generalized data and different assessment methods than those used in the PGI and USGS Reports. In turn, the PGI and USGS Reports, based on USGS assessment methodology, were not so diverse taking into account the presented extreme low values of recoverable gas resources and the used methods of shale gas occurrence probability. The terms EUR (Estimated Ultimate Recovery) and AU (Assessment Unit), used in the USGS methodology of shale gas and shale oil resources assessment are characterized. The paper also presents assessment methods of technically and economically recoverable shale gas, and the significance of "sweet spots" as areas with the greatest probability for shale gas productivity. Finally, proposals for the reconstruction of future work on the new assessment (at the turn of 2014) of recoverable shale gas resources for the Polish Ordovician-Silurian Basin are recommended. The future assessment of shale gas resources should be more detailed, not only due to new geological input data (including results of exploration wells), but also thanks to segmentation of the whole Ordovician-Silurian assessment area into five smaller regional assessment units. The paper presents the criteria of area segmentation and the characteristics of proposed assessment units. The key geological, geophysical and geochemical criteria, which should be taken into consideration in the methodology of new shale gas resources assessment, are compiled. Moreover, to better understand the peculiarity of the Polish Ordovician-Silurian shales and reservoir attributes, and to fit these to shale gas recovery technology, the lessons coming from the US shale basins are discussed. In summarizing, the authors, presenting the conclusions and recommendations, refer to future shale gas resources assessment that, in their opinion, would help particularize the results and thus make them more authenticated.

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Potencjał złożowy ordowicko-sylurskich łupków gazonośnych w Polsce : omówienie dotychczasowych raportów i propozycje udoskonalenia metodyki oceny zasobów gazu w raporcie w 2014 r.

63%

Kiersnowski H. , Dyrka I.

Przegląd Geologiczny

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2013

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tom Vol. 61, nr 6

354--373

EN

The paper comprises a brief history and results of Assessment Reports of shale gas resources for the Polish Ordovician-Silurian Basin. The Reports have been confronted in the context of used criteria of assessing. The comparison shows that the early, most optimistic assessments (Wood Mackenzie, ARI & EIA) were based on very generalized data and different assessment methods than those used in the PGI and USGS Reports. In turn, the PGI and USGS Reports, based on USGS assessment methodology, were not so diverse taking into account the presented extreme low values of recoverable gas resources and the used methods of shale gas occurrence probability. The terms EUR (Estimated Ultimate Recovery) and AU (Assessment Unit), used in the USGS methodology of shale gas and shale oil resources assessment are characterized. The paper also presents assessment methods of technically and economically recoverable shale gas, and the significance of "sweet spots " as areas with the greatest probability for shale gas productivity. Finally, proposals for the reconstruction of future work on the new assessment (at the turn of 2014) of recoverable shale gas resources for the Polish Ordovician-Silurian Basin are recommended. The future assessment of shale gas resources should be more detailed, not only due to new geological input data (including results of exploration wells), but also thanks to segmentation of the whole Ordovician-Silurian assessment area into five smaller regional assessment units. The paper presents the criteria of area segmentation and the characteristics of proposed assessment units. The key geological, geophysical and geochemical criteria, which should be taken into consideration in the methodology of new shale gas resources assessment, are compiled. Moreover, to better understand the peculiarity of the Polish Ordovician-Silurian shales and reservoir attributes, and to fit these to shale gas recovery technology, the lessons coming from the US shale basins are discussed. In summarizing, the authors, presenting the conclusions and recommendations, refer to future shale gas resources assessment that, in their opinion, would help particularize the results and thus make them more authenticated.

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Polskie złoża gazu ziemnego z łupków na tle wybranych niekonwencjonalnych złóż Europy Środkowo-Wschodniej

51%

Karcz P. , Janas M. , Dyrka I.

Przegląd Geologiczny

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2013

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tom Vol. 61, nr 7

411--423

EN

This paper describes a regional overview of selected Central and Eastern European sedimentary basins which hold the unconventional potential for shale gas and shale oil exploration that have attracted interest in the last few years. Organic-rich fine-grained rocks like black and dark-grey shales, mudstones and claystones with varying ages from Cambrian to Miocene are distributed very irregularly across Europe. A long- -lasting, dynamic geological evolution and continuous reconstruction of the European continent resulted in the formation of many sedimentary basins. In some basins, biogeochemical conditions favoured preservation of accumulated organic-rich deposits and led to the generation of hydrocarbons after burial and reaching appropriate maturity levels. Even though shale gas and shale oil exploration in Europe is still in its infancy, shale formations were analyzed before as the source rocks in conventional petroleum systems. Parameters that were used to describe source rocks e.g.: total organic carbon, maturity, thickness, depth of occurrence and areal extent, can indicate preliminary potential for shale gas exploration and allow estimating first resource values. Currently the most intense shale gas exploration takes place in Poland where over 42 wells have been drilled and over 100 concessions for unconventional hydrocarbon exploration have been granted. Upper Ordovician and Lower Silurian shales at the East European Craton (Baltic and Lublin-Podlasie Basins) are the major targets for unconventional exploration in Poland. In Central and Eastern Europe, evaluation of the unconventional potential of gas-bearing shale formations is carried out also in Ukraine, Lithuania, Austria, Czech Republic, Hungary, Romania, Bulgaria, Moldavia and the European sector of Turkey. Despite the fact that each shale rock differs from another by geochemical, petrographical, petrophysical, mechanical and other parameters, some similarities can be seen such as marine type of depositional environment with the predominance of type II kerogen or specific organic matter content. Recoverable resources of shale gas throughout Europe are believed to be as large as 17.6 bln m3 and Poland, Ukraine, France with United Kingdom are thought to have the greatest resources.

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Polish shale gas deposits in relation to selected shale gas prospective areas of Central and Eastern Europe

51%

Karcz P. , Janas M. , Dyrka I.

Przegląd Geologiczny

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2013

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tom Vol. 61, nr 11-1

608--620

EN

This paper describes a regional overview of selected Central and Eastern European sedimentary basins which hold the unconventional potential for shale gas and shale oil exploration that have attracted interest in the last few years. Organic-rich fine-grained rocks like black and dark-grey shales, mudstones and claystones with varying ages from Cambrian to Miocene are distributed very irregularly across Europe. A long- -lasting, dynamic geological evolution and continuous reconstruction of the European continent resulted in the formation of many sedimentary basins. In some basins, biogeochemical conditions favoured preservation of accumulated organic-rich deposits and led to the generation of hydrocarbons after burial and reaching appropriate maturity levels. Even though shale gas and shale oil exploration in Europe is still in its infancy, shale formations were analyzed before as the source rocks in conventional petroleum systems. Parameters that were used to describe source rocks e.g.: total organic carbon, maturity, thickness, depth of occurrence and areal extent, can indicate preliminary potential for shale gas exploration and allow estimating first resource values. Currently the most intense shale gas exploration takes place in Poland where over 42 wells have been drilled and over 100 concessions for unconventional hydrocarbon exploration have been granted. Upper Ordovician and lower Silurian shales at the East European Craton (Baltic, Lublin and Podlasie basins) are the major targets for unconventional exploration in Poland. In Central and Eastern Europe, evaluation of the unconventional potential of gas-bearing shale formations is carried out also in Ukraine, Lithuania, Austria, Czech Republic, Hungary, Romania, Bulgaria, Moldova and the European sector of Turkey. Despite the fact that each shale rock differs from another by geochemical, petrographical, petrophysical, mechanical and other parameters, some similarities can be seen such as marine type of depositional environment with the predominance of type II kerogen or specific organic matter content. Recoverable resources of shale gas throughout Europe are believed to be as large as 17.67 trillion m3 (624 Tcf) and Poland, Ukraine, France with United Kingdom are thought to have the greatest resources.

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Strefy perspektywiczne występowania niekonwencjonalnych złóż węglowodorów w kambryjskich, ordowickich, sylurskich i karbońskich kompleksach skalnych Polski : integracja wyników badań

23%

Podhalańska T. , Waksmundzka M. I. , Becker A. , Roszkowska-Remin J. , Dyrka I. , Feldman-Olszewska A. , Głuszyński A. , Grotek I. , Janas M. , Karcz P. , Nowak G. , Pacześna J. , Roman M. , Sikorska-Jaworowska M. , Kuberska M. , Kozłowska A. , Sobień K.

Przegląd Geologiczny

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2016

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tom Vol. 64, nr 12

1008--1021

EN

The paper presents the characteristics of prospective zones identified for the first time within the lower Palaeozoic shale formations occurring in the Baltic-Podlasie-Lublin Basin and within the Carboniferous shale, sandstone, and mixed shale-sandstone complexes (the so-called hybrid complexes) in the basin of south-western Poland. The lateral and vertical ranges of these zones are determined based on specific criteria using the results of various research methods and analyses, i.e.: stratigraphic, sedimentological, mineralogical, petrological and geochemical of organic matter, petrographic and petrophysical, including interpretation of well logs. Archived geological materials and those coming from the boreholes drilled recently in the concession areas were also used. Four prospective zones have been distinguished in the lower Palaeozoic of the so-called shale belt: SP1, SP2, SP3 and SP4. The most prospective area for the occurrence of unconventional hydrocarbon deposits in shale formations is the Baltic region – the Łeba Elevation, where there are all four perspective zones, only partially covering the range of potentially prospective formations. In each of these zones, both liquid and gas hydrocarbons can be expected in this area. Due to the low percentage of organic matter, the lowest hydrocarbon generation potential is attributed to the Lublin region. However, the low values of this parameter are compensated by other parameters, i.e. the considerable thickness and lateral extent of zone SP4 corresponding partly to the Pelplin Formation. In the Carboniferous rocks of south-western Poland, seven prospective zones have been distinguished in four borehole sections. Four of them are “tight” zones in compact sandstones, while the other three zones represent a hybrid type in complexes with mixed lithology. No prospective zones have been defined in complexes with homogeneous shale lithologies. Determination of lateral extents of the identified zones has not been possible due to the scarcity of data on the geological structure and stratigraphy of the Carboniferous succession in the study area