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Technical Content

Industry Article

Pushing seismic resolution to the limit with FWI Imaging

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

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 ...

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Industry Article

From FWI to ultra-high-resolution imaging

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

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 ...

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Industry Article

Global Geothermal Energy

Energy Global | Ellie Macinnes ©2022 Palladian Publications Ltd

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 ...

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Technical Abstract

Elastic Land Full-Waveform Inversion in the Middle East: Method and Applications

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

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 ...

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Technical Abstract

Fizz Gas Characterization Through Density Inversion: A Case Study in Deep-Water Sabah

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

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 ...

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Technical Abstract

Integrated Reservoir Characterisation of a Permian Rotliegend Prospect

EAGE - European Association of Geoscientists and Engineers | Grant Cole, Robert Gater, Malcolm Kent, Jim Fenton, Natalia Wasielka, Vitor Serrano Alves, Carolina Olivares, Sean Humphreys (CGG) ; Stian Lindstrøm (OMV (Norge) AS) ; Alenka Crne, Sarah Robertson (Chrysaor Norge AS) ©2022 EAGE

This study aimed to provide greater insight into the question of whether a near-field Paleozoic interval could retain sufficient reservoir quality to be attractive for future exploration. To meet this challenge, an integrated multidisciplinary approach was adopted that brought together detailed geological analysis with ...

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Technical Abstract

Introducing Deep Neural Networks for Ultra-Fast Track Processing: A New Early-Out Product for Qc and Interpretation

EAGE - European Association of Geoscientists and Engineers | Guillaume Gigou, Loic Janot, Nicolas Salaun, Sylvain Masclet, Isabel Espin (CGG) ; Per Eivind Dhelie, Vidar Danielsen, Jan Erik Lie (Lundin Energy) ©2022 EAGE

To improve the imaging of the Barents Sea’s Nordkapp basin, either in terms of resolution or geological structure, a new seismic acquisition design was proposed, using a widespread hexa-source sitting on top of 18 non-flat streamers. Imaging this new recorded data required specific and ...

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Technical Abstract

High-Resolution Full-Waveform Inversion for Structural Improvement and Prospects Delineation: a Case Study at Haugaland High

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

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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Technical Abstract

Depth Imaging in North Kuwait: Challenges and Solutions

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

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 ...

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