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AAPG Bulletin

Abstract

AAPG Bulletin, V. 97, No. 10 (October 2013), P. 16451656.

Copyright copy2013. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/03271312119

Composition of Previous HitseismicNext Hit facies: A case study

Stale Emil Johansen1

1Norwegian University of Science and Technology, Department of Petroleum Engineering and Applied Geophysics, Trondheim, Norway; [email protected]

ABSTRACT

In this case study, we used simulated Previous HitseismicNext Hit data from outcrops on Svalbard to analyze what Previous HitseismicNext Hit facies are composed of, what the dominating factors in forming the facies are, and which consequences this has for the interpretation results. Previous HitSeismicNext Hit facies analyses can be used to interpret environmental setting, depositional processes, and lithology. Here, we found that noise is the most important factor in forming the Previous HitseismicNext Hit facies. Noise is defined as all reflections that cannot be ascribed directly to the reservoir model. Effects from overburden and processing dominated, and the low-frequency content of the Previous HitseismicNext Hit section complicated the Previous HitseismicNext Hit facies analyses. The main reason for this is that the analysis relies heavily on identified internal patterns and low-angle terminations. Such patterns and terminations are easily created by the Previous HitseismicNext Hit method itself, by overburden effects, and by artifacts generated when processing the data. External form, strong amplitudes, and continuous reflections are robust Previous HitseismicNext Hit observations, whereas the internal pattern and terminations are commonly deceptive. Identification of boundaries based on predefined patterns of terminations does not work here, and uncritical use of Previous HitseismicNext Hit facies analysis in this interpretation case will create wrong reservoir models. Because of the size of the outcrops, the results from this analysis are relevant for reservoir-scale Previous HitseismicNext Hit interpretation and detailed interpretation for prospect evaluation in mature basins. For Previous HitseismicTop interpretation at a more regional scale, it is probably less relevant.

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