Regularized inversion for subsalt imaging: real data example

Marie L. Clapp and Robert G. Clapp

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ABSTRACT

Imaging the subsurface where seismic illumination is poor is a difficult exercise. Conventional imaging techniques such as migration are insufficient. Better results can be obtained from regularized least-squares inversion methods that use migration operators in a conjugate-gradient minimization. We demonstrate this regularized inversion using downward continuation migration and regularization along offset ray parameters (reflection angles) on a real 2-D seismic line. The result is cleaner than the migration result and has filled in some amplitude information where poor illumination caused gaps. We discuss a regularized inversion that uses common azimuth migration and the same type of regularization to image a real 3-D subsurface around a salt body.

 

• Introduction
• Review of regularized inversion
  • The migration operator
  • The regularization operator
• Results
• Conclusions
• Future work
• Acknowledgments
• : REFERENCES
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