Technical Content

The main reservoirs in the Balder and Ringhorne areas consist of large Paleocene sand mounds as well as Eocene sands, including thin and steeply dipping injectite bodies. Imaging of the targets in the legacy towed-streamer data is challenging due to sub-optimal signal-to-noise ratio, kinematic ...

Permanent reservoir monitoring at Snorre provides high-quality 4D information from PP waves. However, due to the compartmentalized geology, pressure and fluid-saturation effects in the reservoir are difficult to disentangle. We describe 4D processing and imaging of PS mode-converted waves to complement the PP dataset ...

This paper explores the potential of leveraging legacy streamer data from the Utsira High in the North Sea to derive valuable exploration insights, despite its limitations. The study focuses on overcoming key geophysical challenges posed by shallow geological features like sand injectites and the ...

Traditional imaging of the Frigg-Gamma structure in the Yggdrasil area of the Norwegian North Sea is compromised by the presence of large vertical columns of calcite cementation. These cemented pipes have a highly contrasted seismic velocity regime compared with the surrounding sediments, causing strong ...

Full Waveform Inversion (FWI) has become a standard method for generating high-resolution subsurface velocity models. Advances in FWI now allow the use of the full recorded wavefield, including diving waves, primary reflections, and multiples, leading to improved velocity updates even below the maximum penetration ...

Renewed exploration success in the Kazakhstan Sector of the Caspian Sea (KSCS) depends on a critical reassessment of existing results and a redefined understanding of the region’s hydrocarbon potential. This study presents one such reassessment, integrating geological and geophysical data with newly reprocessed seismic ...

As global energy demand continues to rise, continued investment in oil and gas will be critical to keep pace. Recent frontier basin exploration, particularly in deepwater basins in Namibia, Côte d’Ivoire, Guyana and Brazil, have yielded high-impact discoveries. However, these settings demand identification of ...

Ultra high-resolution (UHR) marine seismic is a scaled-down version of conventional seismic acquisition. Source-receiver separation and depth, shooting rate and seismic wavelengths are typically ten times smaller than for conventional seismic operations. Under ideal conditions, ten times higher subsurface resolution may be achieved, but ...

Our Head of Geoscience explains how Viridien’s latest seismic technologies, such as full-waveform inversion and the Sercel Tuned Pulse Source (TPS), are delivering outstanding early-out results on this next-generation multi-client program.