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Improvement of Kirchhoff Migrated Images by Dip Selection and Steered Stacking on Multi-Angle Gathers
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006, Jun 2006, cp-2-00175
- ISBN: 978-90-73781-00-9
Abstract
Kirchhoff Pre-Stack Depth Migration (PreSDM) can output images according to multiple angle attributes: reflection angles, illumination dip angles, and their combination. The images can be Common Image Gathers (CIG), that is, images corresponding to one or several attributes at a same observation location, or common angle images, that is, structural images for a single angle attribute at a time. Both images and CIGs can be used as interpretive and diagnosis tools. In this paper we demonstrate that the user can perform a selective stacking within a multi-angle CIGs, to produce an improved final image, free of some migration artifacts and undesirable noise. The steered stacking gives more flexibility than migration with a dip model, particularly in presence of multiple dips (faults, terminations, etc.).