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Wide Azimuth Imaging

As the requirements for higher resolution subsurface images increase, the technique of wide azimuth (WAZ) marine data acquisition has become increasingly common. The promise of this technique is to provide oil companies with enhanced images, especially in areas with complex geology such as the Gulf of Mexico. In order to attain optimal imaging results from wide azimuth surveys the application of advanced data processing techniques is necessary. As a known leader in depth imaging, ION has developed a set of tools to address WAZ data processing.

Key tools within ION's WAZ portfolio include:

  • Wide azimuth 3D SRME: A process that attenuates multiples found in marine datasets; an optimal application in wide azimuth setting
  • Wide azimuth tomography: Estimates the sedimentary velocity field; our imaging team uses a combination of Kirchhoff, beam and reverse time migration (RTM) to build offset and angle gathers used in this tomographic inversion, front-ended by a robust automatic picking program
  • Wide azimuth reverse time migration: Acquisition geometries of wide azimuth surveys are ideally suited for RTM due to low shot count and high fold; RTM works on common shot gathers and therefore enables efficient processing of wide azimuth data
  • Wide azimuth Kirchhoff pre-stack time and depth migration: ION has developed amplitude-preserving Kirchhoff PreSTM and PreSDM routines which are ideal for imaging complex geologic conditions or velocity fields.