Autor: Jarosiński, Marek. - Katalog OPAC zbiorów

Tytuł:: Unconfined compressive strength of Lower Paleozoic shales from the Baltic Basin (northern Poland)
Autorzy:: Wojtowicz, Michał
Jarosiński, Marek
Pachytel, Radomir Władysław
Powiązania:: https://bibliotekanauki.pl/articles/2059581.pdf
Data publikacji:: 2021
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: unconfined compressive strength
triaxial tests
empirical equations
shale reservoir
Baltic Basin
Opis:: Unconfined compressive strength of Lower Paleozoic shales from the Baltic Basin (northern Poland)Unconfined compressive strength (UCS) is one of the crucial parameters for geomechanical modelling of unconventional reservoirs useful for the design of hydraulic stimulation of hydrocarbon production. In spite of a large amount of UCS data collected from the Lower Silurian and Ordovician shale successions of the Baltic Basin (northern Poland), no comprehensive study on this subject has been published so far. Here, we compile the results of 247 single-stage confined compressive strength tests (CCST) provided by our industrial partner from four exploration boreholes. Based on the integration of these results with geophysical logging data, including dipole sonic logs, we derive empirical equations describing the relationship between UCS and Young’s modulus or sonic wave slowness. Considering the strong anisotropy of elastic properties in shales we have introduced different empirical equations for UCSv (vertical) and UCSh (horizontal), respectively perpendicular and parallel to bedding. The formula for UCSh is determined with less accuracy than for UCSv due to scarce laboratory tests with bed-parallel loading. Based on the empirical formula proposed, we have estimated the VTI-type of anisotropy to be in the range of 12–27%, depending on the lithostratigraphic formation. The results of our UCS estimations are compared with the results of multi-stage CCST from the adjacent borehole. Both confined tests yielded similar results for UCSv, with slightly higher values obtained from the multi-stage tests. In turn, a comparison of our solution with the results of true uniaxial compressive strength tests (UCST) for vertical samples from one of the studied boreholes revealed a significant discrepancy. The mean UCS results for shale formations from UCST are several times lower than those evaluated from the single-stage CCST. The usefulness of the results obtained for borehole breakout analysis is discussed.
Źródło:: Geological Quarterly; 2021, 65, 2; 65: 33
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Tragedia Sojuza-1 : nieznane okoliczności tragicznego zdarzenia sprzed lat
Autorzy:: Jarosiński, Marek.
Powiązania:: Wiraże 2006, nr 6, s. 20-21
Data publikacji:: 2006
Tematy:: Komarov, Vladimir
Loty kosmiczne ZSRR 1967 r.
Astronautyka ZSRR 1961-1969 r.
Opis:: Fot.
Dostawca treści:: Bibliografia CBW

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Skocz do pozycji: 10.

Tytuł:: The estimation of CO2 storage potential of a gas-bearing shale succession at the early stage of reservoir characterization : a case study from the Baltic Basin (Poland)
Autorzy:: Wójcicki, Adam
Jarosiński, Marek
Roman, Michał
Powiązania:: https://bibliotekanauki.pl/articles/2058853.pdf
Data publikacji:: 2021
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: carbon dioxide
storage capacity assessment
shale gas reservoir
sorption
pores
fractures
Opis:: Estimation of the CO2 storage potential of gas-bearing shales in the Lower Paleozoic Baltic Basin is at an early stage of reservoir exploration and production, based on data from one vertical exploration borehole, supplemented with some information from adjacent boreholes. The borehole section examined is 120 m long and comprises three intervals enriched with organic matter separated by organic-poor intervals. In our approach, the storage capacity is represented by: (1) sorption potential of organic matter, (2) open pore space and (3) potential fracture space. The potential for adsorbed CO2 was determined from Langmuir isotherm parameters taken from laboratory measurements and recalculated from CH4 adsorption curves. The pore space capacity was estimated in two ways: by utilizing results of laboratory measurements of dynamic capacity for pores >100 nm and using results of helium porosimetry, the first of these being considered as the most relevant. Due to the low permeability of the shale matrix we have adopted the standard assumption that the CO2 is able to reach effectively only 10% of the theoretical total sorption and pore volume. For hydraulic fracture space, the theoretical maximum opening of vertical fractures in the direction of minimum horizontal stress was considered, decreased by the expected portion of fracturing fluid flowback and by partial fracture closure by burial compaction. The effectiveness of three CO2 storage categories for the individual organic-rich and organic-poor shale units shows an obvious positive correlation of TOC content with the storage efficiency by sorption and within pore space, and a negative correlation with the storage efficiency in hydraulic fractures. It was estimated that sorption, over the maximum storage interval (120 m thick), is responsible for ~76% of total storage capacity, pore space accounts for 13% (for the most relevant porosity model) while the contribution of fractures is about 11%. In the minimum storage interval (35 m thick, including the best quality shales) the estimated proportions of sorption, pore space and fractures in the total storage capacity are 84, 10 and 6% respectively. Finally, the result for the best quality storage interval (35 m thick) was compared with the Marcellus Shale of similar thickness (average ~38 m) and with other options of CO2 storage in Poland. The most organic-rich units in the area studied have a CO2 storage capacity efficiency (i.e. storage capacity per volume unit of shale) only slightly less than average for the Marcellus Shale, because sorption capacity – the dominant component – is comparable in both cases. However, the open pore space capacity in the Marcellus Shale appears to be far higher, even if the potential fracture space calculated for the borehole studied is taken into consideration, probably because the free gas content in the Marcellus Shale is far higher than in the Baltic Basin. CO2 storage in depleted shale gas wells is not a competitive solution compared to storage in saline aquifer structures or in larger hydrocarbon fields.
Źródło:: Geological Quarterly; 2021, 65, 1; 3
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Tectonics of the Wysoka Kamieńska Graben (NW Poland) and implications for fault sealing potential
Autorzy:: Bobek, Kinga
Konieczyńska, Monika
Jarosiński, Marek
Powiązania:: https://bibliotekanauki.pl/articles/2060117.pdf
Data publikacji:: 2021
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: tectonic graben
salt decoupling level
underground storage
fault seal potential
geological modelling
Opis:: Reservoir confinement by faults is important for safe storage of liquid waste or hydrocarbons. Having access to 3D seismic and borehole data, we have interpreted the tectonic setting of the Wysoka Kamieńska Graben (WKG) in the NW part of the Polish Basin and subsequently made an interpretation of the sealing potential of the graben-bounding faults. The formation and development of the graben in the Late Triassic and Early Jurassic was controlled by mechanical decoupling in the salts of the Zechstein Group. The primary tectonic factor triggering the graben origin was dextral strike-slip movement along the regional fault zone in the Paleozoic basement, transtensional accommodation of which in the Zechstein-Mesozoic cover led to development of a horse-tail pattern of grabens. During the Late Cretaceous, the graben underwent minor tectonic inversion. Sealing potential analysis of the graben-bounding faults was performed for the Triassic–Jurassic sequence including juxtaposition seal and fault gouge seal components. Finally, we have focussed our interpretation on the Jurassic sequence where the best reservoirs have been recognized. Our results indicate good to moderate sealing potential of the Hettangian reservoir, poor to moderate sealing of the Pliensbachian reservoir and lack of sealing of the Bajocian reservoir. Hence, the Hettangian reservoir, characterized by large thickness, low clay content and a large regional extent, acts as a potential storage formation, being confined by the graben-bounding faults of the WKG.
Źródło:: Geological Quarterly; 2021, 65, 3; 65: 38
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki