Geologia
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ISSN 0138-0974
e-ISSN: 2353-0782
Issue Date
2005
Volume
T. 31
Number
Nr 3-4
Description
Journal Volume
Geologia
T. 31 (2005)
Projects
Pages
Articles
Analiza możliwości wykorzystania georadarowych fal refrakcyjnych do lokalizacji zmian w budowie wałów przeciwpowodziowych
(Wydawnictwa AGH, 2005) Marcak, Henryk; Gołębiowski, Tomisław; Tomecka-Suchoń, Sylwia
The GPR refracted waves can be used for evaluation of parameters, which characterize two-layer ground, where upper layer has higher value of dielectric constant than lower one. Such situation can take a place in a river embankments, where over the zone of consolidation with low water content is placed a lose zone with large amount of rain-water. The results of GPR measurements carried out on the embankments in Kraków, give possibility for identification the consolidated and lose zones, between geotechnical bench-marks. The paper presents new technology of GPR profiling with various offset of antennas and it describes the technique of identification the different kinds of GPR waves, with special treatment of refracted waves.
Próba wykorzystania analiz amplitudowych zapisu sejsmicznego do określenia własności zbiornikowych dolomitu głównego
(Wydawnictwa AGH, 2005) Pietsch, Kaja; Tatarata, Artur
This paper presents the application of seismic amplitudes analysis to characterization of the petrophysical properties of Main Dolomite in terms of hydrocarbons exploration. Seismic modellings were used as a support tool at the presented interpretation. Various variants of seismogeological models were constructed on the basis of well log analyses. Theoretical wavefield computed for the obtained models were a basis for further assessment of the causes of anomalous amplitude effects coming from the top of Main Dolomite. Moreover, this approach was useful for proposing the construction of amplitude filters used to reduce an undersirable tuning effect, which occurs in thin beds formations. The obtained results were helpful in the analysis of registered data from 3D seismic survey in Cychry-Namyślin area (Geofizyka Toruń Ltd. 1998).
Wykorzystanie atrybutów sejsmicznych w interpretacji badań sejsmicznych o podwyższonej rozdzielczości otrzymanych na złożu siarki w Osieku
(Wydawnictwa AGH, 2005) Lędzka, Joanna; Ślusarczyk, Ryszard
In his paper the evaluation of possibilities for seismic attributes in interpretation of high-resolution seismic section from sulphur mine in Osiek has been undertaken. Exploitation of sulphur deposits by melting with special well-system can destroys surface and water-bearing level. These threats could be reduced by safe exploitation, in which sulphur melting and processes connected with it are under permanent control. The application of periodic seismic profiling helps us define changes in formation resulting from the exploitation. The information is very important both in planning exploitation and in environment protection. Using seismic attributes gives us a better representation of deposits and overburden, and changes subsequent to exploitation too.
Analiza czasowo-częstotliwościowa akustycznych obrazów falowych za pomocą transformaty falkowej
(Wydawnictwa AGH, 2005) Wawrzyniak-Guz, Kamila
Interpretation of acoustic full waveforms is based on identification of elastic waves recorded in boreholes. Determination of arrival time and duration of wave packets can be solved using time-frequency analyses such a wavelet transform. Discrete and continuous wavelet transform were applied to decomposition of wave field. Research showed that discrete wavelet transform is not a proper tool to solving the problem. However, it allows denoising signals. Research on continuous wavelet transform, which has better resolution, are carried out and gives a chance to decompose wave field into separate waves.
Zależności między parametrami petrofizycznymi klastycznych skał karbońskich w basenie lubelskim na przykładzie obszaru Stężycy
(Wydawnictwa AGH, 2005) Jarzyna, Jadwiga A.; Bała, Maria
Characteristics of porosity and permeability and Flow Zone Indicator, FZI, of the Carboniferous clastic rocks, especially of the Middle-Namurian Lower-Westfalian in the Stężyca region, Lublin Basin have been presented. There were discovered differences in FZI between the hydrocarbon deposit section and unproductive beds in the determined III complex and between III and II complexes. A statistical analysis was performed for petrophysical parameters, i.e. porosity, permeability, volumes of sand and shale in the wells: Stężyca 1, 2, 3K and 4 to reveal features typical for all Carboniferous data, III complex and hydrocarbon-bearing section of III complex. High correlation coefficients showed data are well correlated and porosity from cores, Poro, can be substituted by porosity from the comprehensive interpretation of logs, PHI. A division of elaborated data sets due to the FZI has been realized and statistical relations between permeability and porosity in homogeneous flow units have been established. Relations describing a mobility of media in pore space for FZI units appeared to be stronger than for the total data set. A method of a continuous K-logging in situ on the base of PHI has also been a result of conducted considerations.