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

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

2016

Vol. 64, nr 12

1008--1021

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

Niekonwencjonalne węglowodorowe źródła energii – gazohydraty

Ciechanowska M.

Nafta-Gaz

2014

R. 70, nr 10

724--727

W artykule omówiono prace podejmowane w ostatnim okresie przez szereg krajów dla zlokalizowania złóż hydratów metanu, stanowiących źródło energii o zasobach prognostycznych wielokrotnie przewyższających wartości szacowane w przypadku złóż konwencjonalnych gazu ziemnego. Złoża hydratów występują w 98% na szelfach praktycznie wszystkich kontynentów, ale także w śródlądowych morzach i jeziorach czy pod pokrywą lodową stref podbiegunowych. Informacje o pozytywnych wynikach testu produkcyjnego, przeprowadzonego w 2013 r. przez japońską firmę JOGMEC, wzmogły intensywność tych poszukiwań, przy równoczesnym doskonaleniu techniki eksploatacji, tak aby były one bezpieczne, a wydobycie ekonomicznie uzasadnione.

The article discusses the works undertaken recently by many countries aiming at finding deposits of methane hydrates which are a prognostic energy source exceeding several times the resources of conventional deposits of natural gas. Hydrate deposits occur in 98 per cent on the shelves of practically all continents, but also in inland seas and lakes, as well as under the ice caps of the polar zone. The news of positive results of production test carried out in 2013 by the Japanese company JOGMEC increased the intensity of exploration works and simultaneously contributed to improvements in production techniques so that they can be safe and the production economically substantiated.

Gazohydraty - nowy rodzaj paliw kopalnych

Zagorski J.

Przegląd Geologiczny

2013

Vol. 61, nr 8

452--459

Unconventional hydrocarbon resources in last years draw the attention of petroleum geologists. Significant position take the gas hydrates, first of all due to occurrences in many regions of the world and the size of the potential resources. These accumulations are localized in Arctic regions with permafrost as well as offshore. First gas hydrate discovery occurred in Siberian gas field Messoyakha in permafrost zone and similar accumulations were found in Alaska. Offshore occurrences are located mainly on continental slope. Drillings and samples from permafrost and seabed provided vast amount of data concerned conditions of gas hydrates formation and concentration and allow to better constrain the volume of hydrate-bearing sediments and their gas yield. Resources of hydrocarbons contained in gas hydrate deposits represent a vast energy source potential. Still essential problem is to elaborate efficient commercial production technology. So far positive developments regard only laboratory or semi-commercial scale.