Northern Viking Graben

Mitigate near-field risk in the Northern North Sea with a new dual-azimuth volume

CGG has a consistent regional dataset in the Northern North Sea (Norway and UK sectors) of more than 44,000 km² high-quality North-South PSDM data. Adding to this extensive data library, CGG has recently acquired more than 28,000 km² of East-West 3D data to provide a dual-azimuth volume. The latest addition to complement the NVG survey includes new NVG Hybrid data that showcases an innovative approach of optimizing full-waveform inversion (FWI) through sparsely distributed nodes combined with streamer acquisition.

These datasets are readily available to:

Identify and de-risk near-field exploration targets
Aid maturation of stranded discoveries towards development
Enhance the imaging of multi-directional fault patterns
Provide enhanced resolution to resolve complex reservoir stratigraphy

North Viking Graben Contacts

Jaswinder Mann

datalibrary.scan@cgg.com

NVG Dual Azimuth

New East-West acquisition is being combined with a full reprocessing of the underlying NVG North-South data to generate a dual-azimuth seismic data set.

New Northern Viking Graben dual-azimuth velocity model highlights details within Lower Jurassic reservoir intervals

Comparison of 2018 single-azimuth Q-PSDM (before) and 2021 dual-azimuth final (after)

Innovative, hybrid acquisition for greater uplift

The NVG Hybrid seismic dataset, covering the Oseberg and Martin Linge fields, optimizes full-waveform inversion (FWI) through sparsely distributed nodes in combination with streamer acquisition. By applying time-lag FWI (TLFWI) using offsets up to 60 km, we have greatly improved our velocity modeling and imaging capabilities of deeper and more complex subsurface targets.