State of the Art in Full Waveform Inversion
Monday, 28 April 2025 | Kuala Lumpur, Malaysia
FWI, 3D, AVO, IMAGING, RTM
| Instructor | Ian F Jones (Independent Consultant) |
| Language | English |
| Level | Intermediate |
| Duration | 1-day |
| Format | Classroom setting |
Course Description
Over the past ten years, full waveform inversion (FWI) as emerged and developed to the point that is now the main technique of choice for detailed model building and reflectivity estimation for complex geological environments. In this review, the instructor will outline the underlying principles involved in FWI, detailing the use of RTM to estimate the location of subsurface parameter error, and introduce the many and varied 'flavors' of FWI, noting their limitations and benefits. Use of FWI for model estimation, reflectivity generation, and pre-sack attribute analysis (AVA) will be covered, and demonstrated with field data examples.
Course Outline
For the topics listed below, real data examples will be used to demonstrate the application and limitation of each technique.
- Why do we need a detailed velocity model?
- Migration using wavefield extrapolation methods (WEM, RTM, etc) One-way versus two-way propagation
- Resolving short-scale length velocity anomalies
- The mechanics of tomographic inversion with wavefield extrapolation theory (FWI)
- The scattering limit
- Refraction versus reflection
- Different 'norms' (dynamic versus kinematic: least squares, travel time, phase, optimal transport)
- Examples of current industrial practice for various geological settings
Participants' Profile
The course is designed to be followed by anyone with a broad geoscience background
Prerequisites
No specific detailed foreknowledge is required, although a familiarity with geophysical terminology will be useful
About the Instructor
Ian received a joint honours BSc in Physics with Geology from the University of Manchester, UK in 1977, an MSc in Seismology from the University of Western Ontario, Canada, and a PhD in Geophysical Signal Processing from the University of British Columbia, Canada.
After working for 'Inverse Theory & Applications' in Canada for two years, he joined CGG where for 15 years he was involved in R&D in the London and Paris offices, latterly as manager of the depth imaging.
