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Azimuthal Velocity Analysis

Many petroleum basins are impacted by subsurface anisotropy, which causes seismic velocities to vary according to compass direction (or azimuth). Unless properly accounted for, anisotropy degrades seismic image quality.  ION's AXIS Geophysics team developed the AZIM imaging solution to account for directional velocity variations.  Winner of the 2003 Hart’s E&P Meritorious Award for Engineering Innovation, the AZIM technique uses a full azimuth, non-sectoring approach to determine azimuthal-varying velocities. The results of AZIM include improved stratigraphic resolution, more accurate depth conversion, and a robust foundation for geologic interpretation of anisotropy that can be used to detect reservoir fracture patterns and to perform quantitative AVO.

Following ION’s acquisition of GX Technology (GXT) in 2004, AXIS Geophysics became a division within the GXT group. The development teams from both GXT and AXIS are now working closely together to incorporate anisotropic functionality into the processing tools developed by the other. As a result, the GXT group is able to offer a comprehensive suite of anisotropic imaging solutions to its oil & gas company customers including:

  • AZIM for improved stratigraphic resolution in pre-stack time migrated (PreSTM) data
  • Wave equation pre-stack depth migrated (PreSDM) solutions that can incorporate vertically transversely isotropic velocity models
  • Kirchhoff PreSDM solutions that can incorporate vertically transversely isotropic velocity models 

 

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Additional Resources


AZIM Anisotropic Imaging Solution

Seismic Velocity Anisotropy in the Illizi Basin of Eastern Algeria, Presented at the 2007 EAGE

AZIM in the In Amenas project in Algeria,
presented by BP,  February 2007

Integration of Wide Azimuth Seismic with Static and Dynamic Well Data for Fractured Reservoir Characterization
presented by Statoil, EAGE 2007

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