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Separating Diffractions and Specular Reflections After Imaging
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
Summary
Most methods to separate specular reflections and diffractions require changes inside a migration algorithm or workflow steps before migration. We introduce a workflow that achieves this separation after the depth migration process. This workflow can be applied to any 3D depth migrated volume.
This process consists of three stages. First, a matching pursuit decomposition to remove specular reflection energy. Second, creation of directional image partition gathers using a carefully designed 3D filter bank. Third, a diffraction enhancement weight based on coherency in the gathers.
We illustrate this process on field data examples from Canada.
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