Wyniki wyszukiwania - BazTech

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Nowe perspektywy poszukiwawcze na bazie reprocessingu danych sejsmicznych 3D z rejonu Sokołów–Pogwizdów (zapadlisko przedkarpackie)

Zubrzycka M., Czerwińska B., Nikiel-Tshabangu B., Zubrzycki Z.

Przegląd Geologiczny

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2009

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Vol. 57, nr 11

988-995

EN

Reprocessing of 3D seismic data from the Carpathian Foreland and new interpretation techniques enabled more accurate mapping of structure and facies distribution of Miocene series and their bedrock. The reprocessing of a part of Sokołów Małopolski–Smolarzyny, 2001 3D seismic survey carried out in 2006 was focused on the Pogwizdów structure. Application of GeoProbeŽ software and the detailed analysis of seismic trace attributes along with the structural interpretation gave new information on morphology of the pre-Miocene bedrock and Miocene series. The area of erosional channels (paleovalleys), where anhydrite sediments and probably the Baranów Beds were distinguished, is particularly interesting as it is characterized by some distinctive anomalies of the analyzed seismic attributes. The evidence for presence of anhydrite within the so-called anhydrite-less island significantly enhances probability of discovering new gas fields with the Baranów Beds as reservoirs and anhydrites as a seal. The number of potential gas fields should compensate for their small reserves.

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Rekonstrukcja systemów korytowych w osadach dolnego sarmatu SE części zapadliska przedkarpackiego w oparciu o zdjęcia sejsmiczne 3D

Krawiec D., Dzwinel K., Porębski Sz.

Prace Instytutu Nafty i Gazu

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2008

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nr 150 wydanie konferencyjne

279--284

PL

Do rozpoznania elementów geomorfologii sejsmicznej na zdjęciach 3D osadów miocenu rejonu Dębica—Rzeszów—Sokołów Małopolski zapadliska przedkarpackiego wykorzystano szereg atrybutów sejsmicznych oraz przestrzenną wizualizację 3D. Uzyskane wyniki wskazują na obecność w utworach dolnego sarmatu dwóch systemów podmorskich koryt. Lokalnie rozwinięty system poprzeczny ma części proksymalne ukryte pod nasunięciem stebnicko-karpackim, a w kierunku NE łączył się z systemem osiowym o rozciągłości co najmniej 40 km i przepływie w kierunku E-SE. Koryta w obu systemach wykazują niską krętość, lokalnie anastomozującą lub meandrową geometrię, a ich szerokość wynosi 0,1-0,7 km. Wypełnienia koryt i ich amalgamaty, wykazują miąższości około 5-100 m i prawdopodobnie głównie heterolitowy charakter.

EN

A number of seismic attributes derived from five, partly overlapping 3D seismic datasets, were analyzed in order to get an insight into depositional elements of Miocene strata in SE part of the Carpathian Foreland Basin. Results point out the presence of two, major submarine channel systems in lower Sarmatian deposits. A locally developed transverse system has its proximal reaches hidden beneath the Stebnik-Carpathian thrust and it merges towards NE into an axial system, min. 40 km in extent, which drained to the E-SE. Channels show generally low sinuosity, locally anastomosing to meandering patterns, and their width varies between 0.1 and 0.7 km. Channels' fills, 5-50 m thick, are probably largely heterolithic in character.

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New stratigraphic scheme for Zechstein rocks in the Pogorzela High (Foresudetic Monocline) and its significance for hydrocarbon exploration

Kwolek K., Mikołajewski K.

Przegląd Geologiczny

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2007

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Vol. 55, nr 12/1

1037-1047

EN

Results of an analysis of new 3D seismic data, obtained from the part of the Wolsztyn High in the Pogorzela High area (SW Poland), allow to test the existing knowledge regarding the geologic framework of the Zechstein rocks in this area. A characteristic arrangement of seismic reflectors within pinched-out Zechstein deposits on slopes of the high shows that they are overlapped in relation to the distinct surface of angular unconformity related to the base of the Zechstein-the Z1'seismic boundary. 3D seismic data seems to show that PZ1 strata are absent in the close vicinity of the Pogorzela High with the lower part of the PZ2 cyclothem also absent across the crest. This suggests that the interpretation of the stratigraphy of Zechstein deposits in the Pogorzela-1 and Pogorzela-2 wells (located on the crest of the high) is, in the light of 3D seismic data, questionable. Probably, the initial stages of the Zechstein transgression did not reach the most elevated part of the high, so that the Carboniferous basement is directly overlain by rocks of the Main Dolomite (Ca2), not by the Zechstein Limestone (Ca1) as was previously thought. The lack of Ca1 strata across the crest of the Pogorzela High opens new exploration perspectives in this interval and explains the apparent negative results of boreholes drilled in 1970s. Presumably it also explains differences in formation of these rocks in comparison with the central and western part of the Wolsztyn High (the Kościan-Nowy Tomyśl area).

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Sukcesja osadowa miocenu w rejonie zrębu Ryszkowej Woli (obszar Sieniawa-Rudka), zapadlisko przedkarpackie: wyniki facjalnej i stratygraficznej interpretacji danych wiertniczych oraz sejsmiki 3D

Mastalerz K., Wysocka A., Krzywiec P., Kasiński J., Aleksandrowski P., Papiernik B., Ryzner-Siupik B., Siupik J.

Przegląd Geologiczny

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2006

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Vol. 54, nr 4

333-342

EN

TThe Polish Carpathian Foredeep Basin (PCFB) is the northern compartment of a foreland basin system that surrounds the Carpathian orogenic belt. The axis of the eastern part of the PCFB plunges gently towards SE, where the Miocene basin-fill succession exceeds 2000 metres in thickness. The Miocene succession developed in shallow marine ramp settings and is subdivided into 3 lithostratigraphic units: sub-evaporitic (onshore-to-nearshore), evaporitic, and supra-evaporitic (offshore-to-estuarine). The upper unit includes a siliciclastic series (Upper Badenian–Sarmatian), which constitutes the main segment of the succession. It displays an asymmetric, shallowing-up trend, expressed by the following sequence: hemipelagic-turbiditic-deltaic-low-energy nearshore-to-estuarine facies associations. Sediment accummulation in the basin has been significantly overprinted by higher-frequency cyclicity and encloses several genetic stratigraphic sequences bounded by MFS surfaces. An early phase of the basin development was characterised by high-rate subsidence and slow-rate sedimentation (hemipelagic facies). The turbiditic facies association identified within the Sieniawa–Rudka area resulted from southward progradation of a submarine fan/prodeltaic depositional system, mainly fed from the northern and north–western continental margins of the basin. An overall SE–ward palaeoslope inclination controlled the main phase of the deltaic progradation, which had gradually replaced the turbiditic systems. The late deltaic phase was characterised by ENE palaeotransport directions. The final phase of the basin filling took place in shallow-water, low-energy, nearshore-to-estuarine environments. In the early stage of the basin development, a complex system of NW–SE elongated basement pop-ups and flower structures in the Miocene succession were produced by reactivation and inversion of Mesozoic basement faults. The growth of these positive structures modified local subsidence patterns and affected the organisation of depositional systems of the siliciclastic series. A narrow elevation of the RyszkowaWola High (RWH) gradually grew above one of the pop-up structures. Complex structural-stratigraphic hydrocarbon traps developed along the RWH, due to interaction between the growth of local faults and the development of the successive depositional systems. Tidally-modified delta-top and estuarine facies are the most common hydrocarbon hosts within individual sequences of the „deltaic” segment of the succession..

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Budowa geologiczna i geneza mioceńskiego zrębu Ryszkowej Woli w rejonie Sieniawy-Rudki (wschodnia część zapadliska przedkarpackiego) : wyniki interpretacji danych sejsmiki 3D

Krzywiec P., Aleksandrowski P., Ryzner-Siupik B., Papiernik B., Siupik J., Mastalerz K., Wysocka A., Kasiński J.

Przegląd Geologiczny

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2005

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Vol. 53, nr 8

656--663

EN

The Miocene Carpathian Foredeep Basin in Poland (CFB) developed in front of the Outer Carpathian fold-and-thrust belt, at the junction of the East European craton and the Palaeozoic platform. Within the upper Badenian through Sarmatian deposits of its eastern part, the CFB hosts numerous gas fields. The gas-bearing Miocene succession is characterised by a shallowing-upward trend of sedimentation and consists of offshore hemipelagic, turbiditic and deltaic and nearshore-to-estuarine facies associa-tions. The foredeep basin formation was largely controlled by the structure of its Neoproterozoic–Early Cambrian basement, especially by NW–SE trending faults inherited from Mesozoic tectonic history of SE Poland (subsidence and inversion of the Mid-Polish Trough). Several NW–SE-elongated, narrow basement pop-up structures developed in the northeasternmost part of the CFB, one of them being the Ryszkowa Wola block. The uplift of the pop-up basement block involved Miocene reactivation of older fault zones and resulted in the formation of a narrow, NW–SE elongated Ryszkowa Wola horst (RWH) above it, within the Miocene strata. A complex system of right-stepping, en-echelon, mainly normal faults of predominantly E–W trend, branching off from the NW–SE-striking boundaries of the RWH, has developed around and above the horst, leading to compartmentalisation of the Miocene succession into numerous, mutually displaced and rotated fault blocks. Such an association of deformation structures recognised from the 3D seismics was interpreted in terms of transpressive conditions with the horizontal maximum tectonic compression axis directed š E–W and a sinistral strike-slip displacements on NW–SE striking faults in the basement. The structural interpretation of the Ryszkowa Wola structure proposed here is in line with published results of analogue modelling of fault patterns in sediments overlying active strike-slip discontinuities in a rigid basement. The basement-cover interaction within the Ryszkowa Wola structure in the area of Sieniawa–Rudka was partly coeval with the Miocene deposition of the CFB infill. The uplift and horizontal displacements of the Ryszkowa Wola basement block modified the local subsidence pattern and the organisation of Miocene depositional systems. The syn-depositional strike-slip fault activity in the basement of the CFB resulted in differential movements and rotations of kinematically linked fault-blocks in the Miocene succession around and above the RWH, leading to the formation of numerous gas traps.