We utilize the latest seismic processing technologies to extract maximum value from ocean bottom seismic data. Our experience ranges from 20-m water depths down to 3000 m, with offsets exceeding 80 km, utilizing standard airgun arrays and Enhanced Frequency Sources (EFSs) such as Gemini.
WAZ Streamer RTM and Velocity
Long-offset OBN 24Hz E-DMFWI
OBN for Complex Geological Settings
Sparse, long-offset ocean bottom node (OBN) data is ideally suited for Elastic Dynamic Matching Full Waveform Inversion (E-DMFWI) workflows, providing superior illumination and refraction information. This case study demonstrates the power of pairing long-offset OBN with next-generation acquisition and imaging techniques, delivering cleaner images that enhance structural interpretation and stratigraphic mapping .
The seeded inversion deblending achieves superior results over the inversion-based deblending method alone. Using an initial solution and removing that from the entire inversion process improves the attenuation of the overlapping energy, while requiring less iterations, making it ideal for multi-source OBN surveys.
Full Wavefield Migration (FWM) and Separated Wavefield Imaging (SWIM) are wave-equation-based imaging techniques that benefit from the full recorded seismic wavefield, including primaries and multiples, for enhanced data density, broader angle coverage and improved illumination.
Where the overburden is complex and the acquisition geometry leads to insufficient source and receiver coverage at the surface, both the illumination and wavenumber content of the migrated images can be suboptimal. TGS Least-Squared Migration (LSM) produces improved images of the subsurface by correcting for distortions to the wavefield caused by limitations in acquisition and propagation effects.
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