| Autor: |
Juan Cantillo, Jean-Luc Boelle, Abderrahim Lafram, Didier Lecerf |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011. |
| DOI: |
10.1190/sbgf2011-435 |
| Popis: |
To complement a 3D High Resolution streamer survey, Total E&P operated in 2008-2009 a large 3D Ocean Bottom Node (OBN) acquisition to monitor a hydrocarbon reservoir in deep offshore Angola (Ceragioli et al, 2010). Mirror node imaging has already proved to be more appropriate for 4D imaging and reconciliation with streamer data. However positioning and timing issues as well as azimuthal coherent stacking of data need to be precisely tackled for better preserving their high frequency content. In this paper we show the importance of estimating accurate time statics for nodes deployed in a deep offshore environment. Secondly we demonstrate that the concept of Offset Vector Binning using hexagonal tiles is applicable to this node data acquisition. Mirrored data migration in Common Offset Vector domain provides Common Image Gathers with preserved offset and azimuthal information, which enables azimuthal residual velocity analysis for a better stacking of information at all offsets and azimuths. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
