Workshop 13

Status and challenges of extended domain FWI

Monday 10 June 2024 |



  • Gilles LAMBARE (CGG)
  • René-Edouard PLESSIX (Shell)


Over the last fifteen years, FWI has become an essential tool in seismic imaging. Due to its very large computational size, it is based on iterative local optimization schemes and so impeded by a high sensitivity to cycle skipping. Various approaches have been proposed to mitigate this issue. They are based on time- and space-shifts, Wiener filter, reflectivity, or phase-only information, and they aim at retrieving the low and intermediate wavenumbers of model parameters.
The concept of extended domain inversion as defined by Bill Symes in 2008 offers a general frame for recasting most of these approaches. “Extended” means that additional degrees of freedom are temporarily introduced in the modeling during the local optimization process to provide more efficient optimization paths. Such full wave approaches can involve extensions in the time or space domains or even in the spatiotemporal domain but also can work in the image or data domain with a reflectivity model in addition to the velocity model.
In this workshop, we will discuss the different extensions, their advantages, and challenges.


Participant Profile

Researchers, practitioners, students, and decision-makers interested in better understanding the value and challenges of FWI.


Workshop Programme

Coming Soon!

09:00Opening comments
09:15The reservoir fluid geodynamic processes of separate gas and oil charges in reservoirs – O. C. Mullins (SLB), T. S. Mohamed (UT Texas), M. Kristensen (SLB), S. Pan (SLB), K. Wang (SLB), C. Torres-Verdin (UT Texas)
09:45GOLD (Gas Oil Logs while Drilling) and field cases – R. Valladares de Almeida (Repsol Sinopec)
10:15Coffee Break
10:45Accurate fluid identification in reservoir zones and overburden puts mud gas data under the spotlight again – T. Yang (Equinor)
11:15GPC-RI-UV methods for fluid property prediction – A. Cely (Equinor), J. Alicja Laskowska (APT), E. Michael (APT), J. Moore (APT), Tao Yang (Equinor)
13:00Drilled Cuttings – An underutilized resource for Geochemistry – A. Bonetti (Geolog)
13:30Rock Volatiles Stratigraphy, RVS. Optimize Helium, Hydrogen, Geothermal, Oil and Gas Production and CO2 Storage Using Old and New Drill Cuttings and Core Volatiles – A. M. Smith (Advanced Hydrocarbon Stratigraphy)
14:00Discussion & Closing comments
14:30End of the Workshop