| Autor: |
Nguyen Xuan Nam, Paulo Johann Petrobras, Gisele Camargo, Filipe Borges, Márcio Spínola |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
SEG Technical Program Expanded Abstracts 2015. |
| DOI: |
10.1190/segam2015-5913574.1 |
| Popis: |
Summary The characteristics of a seismic reflector or a set of reflectors might be associated with changes in the strata geometry or lithology. Many existing methods are used to recognize these geology patterns from seismic data. This article presents a workflow for prestack seismic amplitude versus offset (AVO) classification that was applied to an actual dataset in continental shelf of Campos basin. In addition to the classical correlation polygon AVO classification, another parameter, “intensity,” was introduced to further characterize the variations within an individual polygon. Rather than a constant value per polygon, each data point within the polygon is scaled gradationally by its distance to the background trend reference line defined by interpreter. This method enables gradational classification values to be assigned, which captures the “uncertainty” or “intensity” of the classification results and helps to reveal subtle stratigraphic and structural features in the target reservoirs. Finally, the classified seismic volume is submitted to a volume segmentation algorithm to extract geobodies, which can identify the most useful seismic class variations for mapping purposes. This workflow was applied to both the Albian carbonates and Oligo-Miocene reservoirs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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