scholarly journals COMPARATIVE ANALYSIS OF MEASUREMENTS AND ESTIMATION OF PERMEABILITY OF SHALES IN SELECTED WELL SECTIONS FROM BALTIC BASIN (NORTHERN POLAND)

2016 ◽  
Author(s):  
Sebastian Bednarczyk
Keyword(s):  
Comparative Analysis ◽  
Baltic Basin ◽  
Northern Poland

scholarly journals Scenarios for shale gas development and their related land use impacts in the Baltic Basin, Northern Poland

Energy Policy ◽  
2015 ◽  
Vol 84 ◽  
pp. 80-95 ◽  
Author(s):  
Claudia Baranzelli ◽  
Ine Vandecasteele ◽  
Ricardo Ribeiro Barranco ◽  
Ines Mari i Rivero ◽  
Nathan Pelletier ◽  
...  
Keyword(s):  
Land Use ◽  
Shale Gas ◽  
Land Use Impacts ◽  
Baltic Basin ◽  
Northern Poland ◽  
The Baltic

scholarly journals Geomechanical modellingl of Paleozoic Shale Gas Formation: a case study from the Baltic Basin, northern Poland

2017 ◽  
Vol 43 (3) ◽  
pp. 249
Author(s):  
Małgorzata Słota-Valim ◽  
Krzysztof Sowiżdzał ◽  
Halina Jędrzejowska-Tyczkowska
Keyword(s):  
Shale Gas ◽  
Baltic Basin ◽  
Gas Formation ◽  
Northern Poland ◽  
The Baltic

scholarly journals Strategic conditions for the development of Tri-city. Conflicts and cooperation in the context of the metropolitan act

2018 ◽  
Vol 9 (3 (30)) ◽  
pp. 49-61
Author(s):  
Jarosław Kempa
Keyword(s):  
Comparative Analysis ◽  
Metropolitan Area ◽  
Research Method ◽  
Statistical Data ◽  
Qualitative Description ◽  
Investment Projects ◽  
Current Process ◽  
Northern Poland ◽  
Metropolitan Cities

The aim of this work is to present the conditions for the development of Tri-City as the main metropolitan centre of northern Poland. The article is also an attempt to evaluate the current process of cooperation and conflicts between metropolitan cities and the possibility of introducing a metropolitan union in Tri-City. Tri-City has been presented against the background of the main urban centres in the country and the area has been subjected to the delimitation test. Successes in the field of joint investment projects of cities were presented. Criticisms have been made of the existing integration forms of communes established in the metropolitan area. The conducted analysis confirmed strong integration processes and the possibility of introducing a Metropolitan Union in Tri-City as modelled on Górnośląsko-Zagłębiowska Metropolia (GZM). This paper presents a research method - a case study, in which comparative analysis was used. Quantitative and qualitative description methods, statistical data, and analysis of documents regarding integration initiatives have been applied.

scholarly journals Magnetic mineral assemblage as a potential indicator of depositional environment in gas-bearing Silurian shales from Northern Poland

2019 ◽  
Vol 218 (2) ◽  
pp. 1442-1455
Author(s):  
D K Niezabitowska ◽  
R Szaniawski ◽  
M Jackson
Keyword(s):  
Organic Matter ◽  
Mineral Assemblage ◽  
Thermal Evolution ◽  
Sedimentary Basins ◽  
Single Domain ◽  
Magnetic Mineral ◽  
Lower Amount ◽  
Magnetic Minerals ◽  
Baltic Basin ◽  
Northern Poland

SUMMARY Organic matter preservation and associated conditions during deposition, important in the context of fossil fuel exploration, are commonly determined by advanced geochemical analyses. However, the relation between organic matter preservation and magnetic mineral composition remains poorly constrained. The aim of the studies was to check the potential of magnetic mineral differentiation between facies containing various amounts of organic matter as a factor to better understand the processes which influence water chemistry at the bottom of sedimentary basins, and thus to better understand factors controlling the preservation of organic matter. To determine the composition and the properties of magnetic minerals, detailed low-temperature measurements of Saturation Isothermal Remanent Magnetization and hysteresis loops were performed on two types of rocks, Silurian shales from the Baltic Basin (northern Poland). The analysed shale facies are characterized by similar thermal evolution, but different amounts of organic matter: the Pelplin Formation, containing a modest content of organic matter, in which we also examined early diagenetic carbon concretions; and the Jantar Formation, which represents an organic-rich ‘sweet spot’ layer. In both facies, the results indicate the presence of multi- or pseudo-single domain magnetite, which is interpreted as detrital in origin. However, the main observation gained from this study is the relation between magnetic mineral assemblage in the studied shales and the amount of organic matter: in the rocks with modest amounts of organic matter we observed hematite, while in organic-rich layers hematite was absent. Hematite (mostly single-domain grains) preserved in the Pelplin Formation suggests that stable oxygen-rich conditions were present at the bottom of the sedimentary basin continuously during deposition, concretion cementation and compaction. In turn, its absence in the Jantar Formation suggests that during sedimentation and early diagenesis more anoxic conditions appeared. Generally, findings show that the presence of hematite is related to the significantly lower amount of organic matter in sedimentary rocks. Thus, presence of this mineral may be a useful indicator of organic matter preservation.

Brittleness prediction for the Lower Paleozoic shales in northern Poland

2018 ◽  
Vol 6 (3) ◽  
pp. SH13-SH23 ◽  
Author(s):  
Marta Cyz ◽  
Marta Mulińska ◽  
Radomir Pachytel ◽  
Michał Malinowski
Keyword(s):  
Seismic Data ◽  
Support Vector ◽  
Baltic Basin ◽  
Lower Paleozoic ◽  
Northern Poland ◽  
Proximal Support Vector Machine ◽  
Definition Of ◽  
The Baltic ◽  
3D Seismic Data

We have tested brittleness prediction by integrating well and 3D seismic data using machine learning (proximal support vector machine algorithm) for Lower Paleozoic shales from the Baltic Basin in northern Poland. The workflow allowed for differentiation of the brittle and ductile zones of the thin shale layers, as well as mapping of the marly formation (fracture barrier) with superior resolution as compared with the resolution of the original input seismic data. The important part of the success was the appropriate definition of the mineralogical brittleness index (BI) tailored to the local geologic conditions. The obtained BI volume outlines the more and less brittle zones in the lower shale unit, i.e., the Sasino Formation, as well as the overlaying unit with high values of BI (Prabuty marls). The mechanical BI based on the Young’s modulus and Poisson’s ratio did not deliver the desired brittleness characterization of the formations of interest, which confirms the weakness of estimating BI using the above geomechanical measurements alone. The weak point of the reported analysis is the small number of available wells, which makes the prediction’s statistics unsatisfactory.

Seismic azimuthal anisotropy study of the Lower Paleozoic shale play in northern Poland

2018 ◽  
Vol 6 (3) ◽  
pp. SH1-SH12 ◽  
Author(s):  
Marta Cyz ◽  
Michał Malinowski
Keyword(s):  
Azimuthal Anisotropy ◽  
Natural Fracture ◽  
Calibration Data ◽  
S Wave ◽  
Baltic Basin ◽  
Lower Paleozoic ◽  
Depth Migration ◽  
Time Migration ◽  
Northern Poland ◽  
The Baltic

We have developed a case study of amplitude variation with azimuth (AVAZ) analysis applied to quantify the amount of the azimuthal anisotropy present in the Lower Paleozoic shales of the Baltic Basin (northern Poland). The challenges encountered here are related to thin (up to 25 m) deeply buried (approximately 3 km) targets, characterized by a weak average azimuthal anisotropy (1%–2% from cross-dipole sonic data). Synthetic AVAZ modeling confirms the applicability of the method. We used data after full-azimuth angle-domain prestack depth migration (PSDM) processed by a contractor and in-house sectored prestack time migration (PSTM). Application of AVAZ on full-azimuth PSDM data provided results that were further corroborated by the available calibration data. Anisotropy azimuths from AVAZ correlate with natural fracture direction from image logs (x-tended range microimager [XRMI]) interpretation, especially at the wells with only one dominant fracture system present. Fracture strikes inferred from AVAZ also correspond with fracture strikes inverted from the microseismic S-wave splitting analysis. Hudson’s crack densities calculated from the AVAZ anisotropic gradients matched crack densities from cross-dipole sonic as well as followed the same trend as the fracture intensities from XRMI data. Part of the success in this case should be attributed to the high-end processing of the input data because such obvious correlations are absent for AVAZ results on sectored PSTM data.

scholarly journals Upper Homerian (Silurian) high-resolution correlation using cyclostratigraphy: an example from western Lithuania

2017 ◽  
Vol 67 (2) ◽  
pp. 307-322 ◽  
Author(s):  
Sigitas Radzevičius ◽  
Brigita Tumakovaitė ◽  
Andrej Spiridonov
Keyword(s):  
Wavelet Transform ◽  
Comparative Analysis ◽  
Gamma Ray ◽  
Spectral Estimation ◽  
Time Interval ◽  
Continuous Wavelet ◽  
Baltic Basin ◽  
Regional Stage ◽  
Carbon Isotopic ◽  
Water Facies

AbstractThe Gėluva regional stage stratigraphically corresponds to the late Wenlock. This time interval witnessed significant graptolite extinctions and turnovers of conodont faunas, as well as a large positive Mulde carbon isotopic excursion. Thus, the development of a detailed stratigraphy is a necessary step in understanding the complex patterns of regional and global variations in the sediments accumulating during the time interval studied. Therefore, in this contribution we present a cyclostratigraphic analysis of gamma ray (GR) logs from four wells, which are located in the deep water facies belt of the Lithuanian part of the Silurian Baltic Basin of the Gėluva regional stage. The analysis was performed using REDFIT spectral estimation, continuous wavelet transform and signal filtering techniques. As a result two 4thorder and five 5thorder cycles were distinguished and named in all sections. The correlation of cycles between sections was calibrated with the graptolite biozones. The comparative analysis revealed that intra-basinal cyclostratigraphic correlation could achieve resolution of the order of several tens of thousands of years.

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