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EAGE Research Workshop - From Seismic Interpretation to Stratigraphic and Basin Modelling, Present and Future
- Conference date: 25 Sep 2006 - 27 Sep 2006
- Location: Grenoble, France
- ISBN: 978-90-73781-46-7
- Published: 25 September 2006
21 - 23 of 23 results
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Integrated Seismic Facies and Gas Migration Analyses, Danish North Sea
More LessA combined study using various seismic methods has proven to give trustworthy information for a basin modeling study in the Danish North Sea. The methods are spectral decomposition and gas migration analysis.
One example is coal formations of Mid Jurassic age representing swamp areas of that time and in between them we have channel systems. It is expected that there is a difference in the organic content between the two types of geology, and therefore there should be a significant difference in gas migration activity between the coal beds and the channels. The result from this analysis is compared with the result of spectral decomposition, which clearly maps the channels and the coal formations, and we see a clear correlation.
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Complex Reservoirs Need G & G – An Example of a Multidisciplinary Workflow from Offshore Brazil
Authors S. Klarner and B. UjetzWhile exploring for hydrocarbons in rift related basins, volcanics, volcaniclastics and their erosional products are common lithologies. The presence of rock types derived from volcanism or affected by post-volcanic re-deposition may lead to complex lithologies with complex diagenetic overprints at the reservoir level. In most cases highly varied lithologies with wide ranges of inherent rock properties occur.
The Santos Basin contains complex reservoir sandstones deposited during a period of active volcanism. This paper summarises previously presented talks with special emphasis on the multidisciplinary approach required to succeed with seismic interpretation.
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Seismic Sequence Stratigraphy – Revisited
By L. SonnelandSeismic stratigraphic interpretation is a powerful method for analyzing the depositional history of the subsurface. However, the lack of support of such interpretation methods in the state-of-the-art tools limits its application. A novel technology allowing a highly automated procedure for seismic stratigraphic interpretation is presented. The technology includes an automated high resolution extraction step of all the stratigraphic primitives prior to the interactive session. The technology supports a “dual domain” concept that enables to interpret transparently in the seismic domain and the chronostratigraphic time domain. The interpreter controls this mapping by selecting the appropriate set of stratigraphic primitives to define this transformation.
The high resolution horizon extraction step, referred to as extrema classification (refer to [1] ). The output from this classification results in extrema patches / horizon patches from which the stratigraphic primitives might be defined. The method can be extended to active tectonic basins by including fault patches in the mapping between the seismic domain and the chronostratigraphic time domain (refer to [2] ) Figure 1 illustrates how faults supplement extrema patches to define the geological model.
In complex geological settings, as e.g. stacked turbidite channel systems, the application of seismic stratigraphic interpretation might reveal a better understanding of the depositional settings.
References
[1] Lars Sonneland, Hilde G. Borgos, Thorleif Skov, Alexis Carrillat, Trygve Randen, "Automated geometry extraction from 3D seismic data by lateral waveform " In Expanded Abstracts. EAGE, Paris, June 2004.
[2] Pedersen S. I., Skov, T., Hetlid, A., Fayemendy, P., Randen T., and Sonneland, L., 2003, New Paradigm of Fault Interpretation, in Expanded Abstracts of SEG Annual Meeting, Dallas, 26-31 October 2003.
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