Oil & Gas

Visit us at IMAGE 2024 - Booth 823 in Hall A!

Come talk with our experts at the new Viridien booth 823 during IMAGE 2024 and learn about our latest geoscience and digital science developments.

Our booth theatre will feature experts highlighting our latest FWI technology for subsurface imaging, geological data for carbon storage projects, HPC and Cloud solutions, data transformation, and much more. Be sure to join us on the booth for lunch or a happy hour drink!

We have 12 authored and co-authored papers in the IMAGE main technical program and workshops covering our latest seismic and multiphysics imaging developments, including elastic FWI and OBN case studies for subsalt exploration and 4D time-lapse reservoir monitoring. See our IMAGE program presentations below.

We look forward to seeing you at IMAGE 2024!

The Atlantis Field has gone through more than two decades of continuous seismic imaging efforts, during which time many innovative technologies were incubated, the most recent one being the successful application of full-waveform inversion (FWI) in salt environments. This technique led to a significant improvement in the subsalt image. However, imaging challenges remain for the Atlantis reservoirs, primarily due to the complex overburden salt geometries and the highly compartmentalized reservoir. Even with an improved velocity model from FWI, the conventional reverse time migration (RTM) images still suffer from illumination issues and contain strong migration swings that hinder the subsalt imaging and subsequent interpretations. Furthermore, early versions of FWI employed an acoustic assumption, leading to visible salt halos at the salt boundaries in the velocity model, which adversely impacted the reservoir imaging. In the last 12 months, elastic time-lag FWI (TLFWI) and FWI-derived reflectivity (FDR) imaging using long-offset ocean-bottom node data have minimized these imaging issues at Atlantis, providing another step change in subsalt understanding. Although the 3D RTM images using the elastic FWI velocity model are similar overall to their acoustic counterparts, the 4D time-lapse RTM images at Atlantis show noticeable improvements. Furthermore, FDR images derived from elastic FWI velocities show obvious benefits over the acoustic ones. With a more accurate modeling engine that allows for better match between synthetic and real data, FDR imaging shows improved illumination, higher signal-to-noise ratio, and better reservoir details over acoustic FDR imaging. This recent advancement in using elastic TLFWI has had immediate positive effects in facilitating the Atlantis Field’s current and future development.