Advanced Depth Migration Techniques

Audience

Any depth processing geophysicists.

Content

This course begins with a review of the basic principles of depth migration techniques.

The first technique explored is based on Kirchhoff migration and traveltime map computation by ray tracing. High frequency asymptotic approximation, green function and difference between different arrival times are investigated. The course has practical work, where sequences are tested, and new options explored.

The next technique is on the Gaussian Beam and Control Beam; the motivation for beam migration, basic principles, workflow description and more practical work.

The last technique is on Reverse Time Migration; migration from inversion point of view, the Wave Equation, input domains, noise removal and more practical work.

An Analysis of the specificities of land model building relative to topography is proposed as a one-day option.

Learning Objectives

• Understand the different steps of each Depth Imaging algorithm and their parameters
• Understand the difference between algorithms and their position in the workflow
• Practice test jobs for better understanding