Seismic Processing Velocities - Geophysics

Published 2022-08-06
Platform Udemy
Rating 5.00
Number of Reviews 1
Number of Students 5
Price $59.99
Instructors
Ron Kerr
Subjects

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Introduction to 3D Seismic Velocities for Seismic Processing

This course is about seismic velocities, especially as related to seismic processing and 3D seismic exploration. Each presentation contains hand-created graphics, illustrated to explain the concepts. The presentations are separated into 9 individual presentations. The users will better understand the importance of proper seismic velocities and how doing it wrong can severely harm your interpretation. But how using the right velocities, in the right procedures, can greatly help image the subsurface as well as find horizontal layering and vertical fractures.

Parts 1 & 2: Introduction to standard NMO velocities and multiples. How are velocities picked and how to avoid multiples.

Parts 3-5: Fundamental differences between time migration velocities and depth migration velocities. Why depth migration is required for areas with lateral velocity variations. How migrated gathers are affected. What are velocity sags and pull-ups? How to build a traditional sub-salt velocity model.

Parts 6 & 7: Tomography and Full Waveform Inversion. How they are used in depth migration to improve psdm velocity fields. How are gathers affected before and after tomo and fwi? Simple graphics explain each concept.

Parts 8 & 9: Anisotropy. VTI, HTI. Anisotropy can be used to help find horizontal rock layering and vertical fracturing. How does anisotropy look on seismic data?

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