Seismic Processing Velocities - Geophysics

Unlock the secrets of subsurface imaging with this comprehensive course on seismic velocities! This 9-part course dives deep into the crucial role of accurate velocity modeling in 3D seismic exploration and processing. Learn how understanding and applying the correct seismic velocities can dramatically improve your interpretation and reveal hidden geological features.

Here's a breakdown of what you'll learn:

• Understanding Seismic Velocities & Their Impact: Discover why precise seismic velocities are paramount and the severe consequences of inaccurate velocity models on subsurface interpretation. Learn how correct velocities unlock enhanced imaging of the subsurface, including identifying horizontal layering and vertical fractures.

• Part 1 & 2: NMO Velocities & Multiples: Master the fundamentals of NMO velocities and how to effectively handle multiples in seismic data. Learn techniques for accurate velocity picking and strategies to avoid problematic multiples.

• Part 3-5: Time vs. Depth Migration Velocities: Explore the critical distinction between time migration velocities and depth migration velocities. Understand why depth migration is essential in areas with lateral velocity variations and how it affects migrated gathers. Learn to identify and address velocity sags and velocity pull-ups. Build a traditional sub-salt velocity model.

• Part 6 & 7: Tomography & Full Waveform Inversion (FWI): Discover how tomography and full waveform inversion (FWI) are powerful tools for refining velocity fields in depth migration. See the impact of these techniques on seismic gathers before and after processing. Simple, clear graphics illustrate each concept.

• Part 8 & 9: Seismic Anisotropy (VTI & HTI): Uncover the complexities of seismic anisotropy (VTI and HTI) and how it can be leveraged to identify horizontal rock layering and vertical fracturing. Learn to recognize anisotropy patterns in seismic data.

• Bonus Part 10: Merging Seismic Volumes: Learn techniques for effectively merging multiple seismic volumes for improved data quality.

• Real-World Application: 2D Land Seismic Project: Gain invaluable practical experience through a detailed analysis of a real 2D land seismic project in South Dakota, USA. Follow the geological motivation, acquisition process, processing steps, and interpret the final migration images. Understand why some areas of the results are exceptional, while others present challenges. This project provides a tangible understanding of the practical application of velocity modeling and its impact on seismic interpretation.

This course is designed for geophysicists, geoscientists, and anyone seeking to enhance their understanding of seismic velocity, velocity modeling, and 3D seismic interpretation. Improve your ability to image the subsurface and unlock valuable geological insights.