Elastic least-squares reverse time migration
- Linan Xu (University of Alberta) | Aaron Stanton (University of Alberta) | Mauricio Sacchi (University of Alberta)
- Document ID
- Society of Exploration Geophysicists
- 2016 SEG International Exposition and Annual Meeting, 16-21 October, Dallas, Texas
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Exploration Geophysicists
- Multicomponent, Least-squares migration, Migration, Elastic, Reverse-time
- 0 in the last 30 days
- 21 since 2007
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While conventional migration is regarded as an approximation to the inverse of scattering using the adjoint operator, least squares migration is typically formulated as an iterative approach to estimate the reflectivity using forward and adjoint scattering operators. We provide a matrix based formulation of elastic scattering using a staggered-grid finite difference propagator, and derive its adjoint for use in elastic least squares Reverse Time Migration. We solve the system of equations via Conjugate Gradients with a Laplacian preconditioner that mitigates low frequency artefacts in the images.
Presentation Date: Wednesday, October 19, 2016
Start Time: 4:25:00 PM
Presentation Type: ORAL
|File Size||1 MB||Number of Pages||5|
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