- Tytuł:
-
Reinterpretacja tektoniki w obszarze Pomorza Zachodniego w oparciu o nową wersję profilu sejsmicznego 2D po reprocessingu
Reinterpretation of tectonics in the Western Pomeranian area (Northern Poland) based on the new version of the 2D seismic section after reprocessing - Autorzy:
-
Bajewski, Łukasz
Wilk, Aleksander
Urbaniec, Andrzej
Bartoń, Robert - Powiązania:
- https://bibliotekanauki.pl/articles/1834047.pdf
- Data publikacji:
- 2020
- Wydawca:
- Instytut Nafty i Gazu - Państwowy Instytut Badawczy
- Tematy:
-
migracja poststack
prędkości składania
model prędkości
PPS
poststack migration
stacking velocities
velocity model
VSP - Opis:
- This article presents the results of the second part of the work on reprocessing of 2D seismic in the West Pomeranian region. The purpose of reprocessing was to further improve the imaging of under-Zechstein formations and structures. The obtained seismic processing results in the previous stage, although they were better than those obtained on the archival version still do not allow for their reliable structural (as well as facial) interpretation. Reprocessing was performed in post stack migration based on the processing sequence developed at the Seismic Department of the Oil and Gas Institute – National Research Institute. New elements of the currently used processing sequence consisted of a detailed approach to calculate static corrections on each of the registered seismic records and an analysis of the velocity field used in the summation process (on CMP gathers), giving the possibility to calculate residual static corrections in time gates, selected on the basis of dip angle analysis of the reflections in the seismic section. The velocity field for post stack time migration has also been modified. Post stack time migration was based on the current velocity analysis and velocity field obtained on the basis of VPS measurements (vertical seismic profiling), which due to the measurement methodology, contain information about the anisotropy of the geological environment. Seismic image of the analyzed profile obtained at current stage reveals new details of the geological structure compared to the previous study, both in tectonic, structural and facial view. This is mainly visible in Permian-Mesozoic formations. Improvement is also visible in the under-Zechstein deposits, but this seismic image is not still enough for a detailed interpretation. The main reason for the lack of a clear and reliable structural image in the seismic record for under-Zechstein deposits is the lack of correct velocity distribution in these formations, which results from insufficient data. The results of this work show the possibilities of improving the quality of archival seismic sections the studied region as a result of reprocessing. According to the authors, the key to obtaining a detailed seismic image within the sunder-Zechstein formations is the use of the correct velocity model.
- Źródło:
-
Nafta-Gaz; 2020, 76, 6; 363--376
0867-8871 - Pojawia się w:
- Nafta-Gaz
- Dostawca treści:
- Biblioteka Nauki
Artykuł