3D Radon
Advanced Demultiple for Wide-Azimuth Data
Wide-azimuth data acquisition generates 3D gathers with traces which have a broad range of azimuths and offsets.
To accommodate the variation of primary and multiple moveout with azimuth, the 2D high-resolution parabolic Radon transform has been extended to 3D. By doing so we are able to discriminate more accurately between primaries and multiples, even when they are aliased. This results in significantly better demultiple results for wide-azimuth surface streamer, ocean-bottom and land wide-azimuth data in areas of dip or anisotropy.
FEATURES
- True 3D high-resolution parabolic Radon transform
- 3D paraboloid filters accommodate variations in moveout with azimuth
- High-resolution transform for improved results on aliased data
- Applications for:
- Wide-azimuth towed streamer data
- Cross-spread land data
- OBS/OBC data
- Narrow-azimuth data with large azimuth variations
- More effective demultiple for wide-azimuth data
- Improved preservation of primary amplitudes (AVO and AVAZ)
- Direct application to wide-azimuth 3D gathers
- Avoids limitations of 2D and azimuth-sectoring assumptions
- Maximises potential of wide-azimuth data
| << CLICK TO COMPARE >> | ||
| Stacks of wide-azimuth towed streamer data after standard 2D Radon, azimuth-sectored 2D Radon and 3D Radon. Although splitting the data into azimuth sectors improves the effectiveness of the 2D Radon, the 3D Radon is better able to discriminate between the primary and multiple in this area of dipping events and aliased multiple energy. This results in a much cleaner stack and reveals the primaries on the flanks of the structure. | ||
