Workshop 8
Reflectivity: Why do we still need it when inverting for velocity? Monday, June 8th|
Convenors
- Robert Soubaras (Aker BP)
- James McLeman (DUG)
- Eric Verschuur (Delft University)
- Nizar Chemingui (TGS)
Description
A decade ago, when using one-way wavefield propagation methods such as Joint Migration Inversion (JMI), both velocity and reflectivity were jointly inverted. In contrast, with two-way propagation methods like full-waveform inversion (FWI), only velocity was inverted. However, as FWI has advanced to higher frequencies, several approaches have emerged that introduce reflectivity into the two-way formulation, enabling joint inversion of both parameters. This workshop aims to compare one-way and two-way approaches to address key questions: What is reflectivity? Why do we need it? How do we compute it? How do we use it? What is the future of reflectivity?
We encourage submissions containing theoretical and algorithmic considerations, synthetic and real data examples (preferably from the North Sea), and any material addressing the aforementioned key questions.
Sub-Topics that will be covered in the workshop:
- Joint velocity and reflectivity inversion using one-way modeling
- Joint velocity and reflectivity inversion using two-way modeling
- Velocity inversion with two-way modeling with subsequent reflectivity computation
Participant Profile
Geophysicists and imaging/inversion specialists (research and applied) working on velocity model building, FWI, or reflectivity inversion-based workflows.
Workshop Programme
Coming Soon!
| Time | Activity |
|---|---|
| 09:00 | Workshop Introduction |
| Session 1 Off-shore Case studies | |
| 09:10 | Elastic FWI a step forward for improved subsalt imaging in Gulf of Guinea. - Bertrand DUQUET (TotalEnergies) |
| 09:30 | Elastic FWI with sparse low-frequency, long-offset data. - René-Edouard PLESSIX (Shell) |
| 09:50 | Challenges and benefits of elastic FWI in the pre-salt of Santos basin, Brazil. Bruno DIAS (Petrobras) |
| 10:10 | Recent examples from elastic FWI: challenges and opportunities. Ørjan PEDERSEN (Aker BP) |
| 10:30 | Coffee break |
| Session 2 Multi-parameter and multi-component | |
| 10:45 | Elastic FWI: are we leveraging the potential? - Nabil MASMOUDI (BP) |
| 11:05 | Advancing elastic full-waveform inversion – from structural interpretation to amplitude analysis. - Xin CHENG (SLB) |
| 11:25 | Advancements in elastic FWI: Advantages of single and multi-parameter elastic approaches compared to acoustic FWI. - Bertrand CAZELITZ (TGS) |
| 11:45 | Applications of elastic full-waveform inversion on offshore data. - Andrew RATCLIFFE (Viridien) |
| 12:05 | Panel Discussion |
| 12:30 | Lunch break |
| Session 3 On-shore Case Studies | |
| 13:30 | Elastic FWI implementation in Oman onshore data: Developments & Insights. - Omaima AL-DROUSHI (PDO) |
| 13:50 | Towards high-resolution land elastic FWI? - Jian CAO (Viridien) |
| 14:10 | Elastic full waveform inversion of seismic ambient noise. - Ludovic METIVIER (Seiscope) |
| Session 4: New aspects | |
| 14:30 | Multiparameter elastic FWI of 4C OBN data with spectral elements: Application to Gorgon. - Stéphane OPERTO (GeoAzur) |
| 14:50 | Variational Bayesian Multiparameter Seismic Inversion with Structural Similarity Constraints - Dias Urozayev (Sintef) |
| 15:10 | Panel and general Discussion |