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Prognozy wydobycia węglowodorów ze złóż Obszarów Morskich RP - komunikat

100%

Domżalski J. , Mazurek A.

2004

tom T. 20, z. 3

173-178

The note discusses the possibilities hydrocarbons exploitation from reserves located in the Baltic shelf by "Petrobaltic" the Enterprise for Exploration and Exploitation of Oil and Natural Gas. The analyses of the potential geological resources has shown that the reserves of oil in the undersea part of Baltic shelf are about 150 ml m3. The undertaken researches allowed to identify the geo-mechanical abnormalities and asses the perspective zones of hydrocarbons occurrence.

Osiągnięcia i dalsze kierunki rozwoju Przedsiębiorstwa Poszukiwań i Eksploatacji Złóż Ropy i Gazu "Petrobaltic"

100%

Domżalski J. , Mazurek A.

tom R. 54, nr 3

122-125

Skały silikoklastyczne górnego arenigu (volkhov) z otworu wiertniczego B5–1/01 (N Polska)

80%

Domżalski J. , Modliński Z. , Pokorski J. , Szymański B.

Przegląd Geologiczny

2004

tom Vol. 52, nr 2

151-159

Two silicoclastic beds separated by the 0.75 m thick bed of marly limestone were discovered inside the upper portion of the section of Pieszkowo Red Limestone Formation in the offshore B5–1/01 borehole (Fig. 1). The lower bed (0.2 m thick) consists of brownish-grey limy sandstones with intraclasts. The upper one (0.25 m thick) is represented by light grey quartz sandstones and limy quartz sandstones with glauconite. The beds under study belong to theMegistaspis limbata Trilobite Zone (Late Arenig) and can be the equivalent of quartz sandstones in the carbonate Kriukai Formation in western Latvia (Figs 2, 3). The Latvian sandstones are known as “Volkhov collector” and considered a potential hydrocarbon reservoir (Todorovskaya et al., 1976; Laškov & Vosilus, 1987).

The prospects for petroleum exploration in the eastern sector of Southern Baltic as revealed by sea bottom geochemical survey correlated with seismic data

61%

Domżalski J. , Górecki W. , Mazurek A. , Myśko A. , Strzetelski W. , Szamałek K.

tom Vol. 52, nr 8/2

792-799

In the Polish offshore Łeba (B) tectonic block in the southeastern part of the Baltic Sea the oil and gas fields are accumulated in Middle Cambrian quartzose sandstone, often fractured and diagenetically sealed at depth by advanced silification developed in reservoir around the petroleum deposit. Petroleum traps aremainly of structure-tectonic type, i.e., anticlines closed with strike-slip faults. At least four gas-condensate and four oil deposits of total reserves more than 10 Gm3 gas and 30 Mt oil were discovered by the “Petrobaltic” Co. in the Polish Baltic sector. The subsurface petroleum deposits in the Cambrian reservoir are the source of secondary vertical hydrocarbon migration to the surface which produces surface microseepages and hydrocarbon anomalies. Geochemical survey of the sea bottom sediments and waters run along seismic profiles was completed in 1999–2002 within a joint project of “Petrobaltic” Co. Gdańsk and the Fossil Fuels Dept., AGH University of Science and Technology, Kraków, approved by theMinistry of Environmental Protection, Natural Resources and Forestry. It was found that seafloor hydrocarbon anomalies are closely related to subsurface geologic structure and location of petroleum deposits. Particularly the faults as principal venues for vertical hydrocarbon migration are reflected in high-magnitude seafloor anomalies. Above petroleum field there occurs a “halo” effect of high-magnitude anomalies contouring the deposit with damping related to productive zone situated inbetween. Thus, the section of sea bottom anomalies over a petroleum deposit resembles the shape of a volcanic caldera. Positive subsurface structures manifest themselves as neotectonic features in the sea-floor morphology and as petrological variations of the bottom sediments. Along the contours of petroleum field, the sea-floor seeps of gas and submarine springs of subsurface water occur. These are seismically recognizable as gas chimneys, geysers, craters and effusive cones. The sea-floor geysers and springs disturb thermal and density stratification of sea water column. The submarine geochemical studies strictly correlated with seismic profiles may contribute greatly to offshore petroleum exploration and marine environmental protection.