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Technical Content

Industry Article
Environmental Scientist | David Viner ©2022 Institution of Environmental Sciences | March

‘Risk: The potential for adverse consequences for human or ecological systems, recognising the diversity of values and objectives associated with such systems.’ This widely used definition both clarifies and clouds how environmental scientists can discern and address risk. While it provides a broad basis ...

Industry Article
The Leading Edge | Zhigang Zhang, Zedong Wu, Zhiyuan Wei, Jiawei Mei, Rongxin Huang, Ping Wang ©2023 SEG | March

Full-waveform inversion (FWI) has become the centerpiece of velocity model building (VMB) in seismic processing in recent years. It has proven to significantly improve the velocity model, and thus the migration image, for different acquisition types and different geologic settings, including very complex environments ...

Industry Article
The Leading Edge | Isabel Espin, Nicolas Salaun, Hao Jiang, Mathieu Reinier ©2023 SEG | January

The development of time-lag FWI (TLFWI) in recent years has enabled the use of the full wavefield (primary reflection, multiple, ghost, and diving waves) in inversion. With this advance it is now possible to include ever more detail in the velocity model, ultimately reaching ...

Industry Article
The Leading Edge | Zhiyuan Wei, Jiawei Mei, Zedong Wu, Zhigang Zhang, Rongxin Huang, Ping Wang ©2023 SEG | January

Although the resolution of a seismic image is ultimately bound by the spatial and temporal sampling of the acquired seismic data, the seismic images obtained through conventional imaging methods normally fall far short of this limit. Conventional seismic imaging methods take a piecemeal approach ...

Industry Article
Energy Global | Ellie Macinnes ©2022 Palladian Publications Ltd | January

Companies that have worked in the oil and gas industry for many decades have built up a valuable and detailed understanding of the Earth and its subsurface. One such company is CGG, a global geoscience technology and HPC leader that has been collecting and ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Thomas Rebert, Lilas VIVIN, Oualid Bouhdiche, Matthieu Retailleau, David Le Meur, Clement Bossy, Fakhreddine Haouam, Noni Rordjaroenpan (CGG) ; Adel El-Emam, Mohammad Ali, Halis Bayri (Kuwait Oil Company (KOC)) ©2022 EAGE | December

We present the main results of a tailored velocity model building workflow on a recent broadband survey from North Kuwait. Depth imaging in Kuwait presents several challenges, including the need to capture the strong velocity variations of a complex near surface that generates long ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Olivier Leblanc, Anna Sedova, Gilles Lambare, Thibaut ALLEMAND, Thibaut Allemand, Olivier Hermant, Diego Carotti, Daniela Donno, Nabil Masmoudi ©2022 EAGE | December

Applications of full-waveform inversion (FWI) to land data have proven much more challenging than to marine data. The difficulties are linked to a lower signal-to-noise ratio but also to a greater influ-ence of elastic wave phenomena in these data sets, especially those characterized by ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Thibault Le Canu, Nathalie Badel, Olivier Colnard, Romain Reboul, Shivaji Maitra ©2022 EAGE | December

Fizz gas detection is a critical step in field development as it is often difficult to differentiate it from commercial gas in reservoirs on acquired seismic data. In a shallow reservoir context, it is theoretically possible to observe a fizz gas effect through a ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Nicolas Salaun, Andrew Wright, Alessandro Pintus, Alireza Roodaki ©2022 EAGE | December

The Haugaland High, in the Norwegian North Sea, consists of a layered overburden of sub-horizontal sediments of almost 2km thick which sits on the Cretaceous Chalk. The background velocity regime of these top layers has a low vertical gradient down to the Chalk interface ...

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