Geological bodies like sand injectites are found in numerous geodynamic and geological contexts around the world, and they can manifest as low- or high-amplitude seismic responses with complex structures. In this paper, we demonstrated an amplitude preserving DNN-based workflow for injectite detection using customized ...
Technical Content
The role of FWI Imaging in compensating for transmission loss
The role of FWI Imaging in compensating for transmission loss
Seismic wavefields traveling through the subsurface lose energy due to various phenomena, such as geometric divergence and intrinsic attenuation. Imaging algorithms that account for these effects are well established. However, an often overlooked aspect of seismic imaging is transmission loss, which occurs due to ...
Enhanced regional imaging of Late Jurassic depositional systems across the Northern Viking Graben, Norwegian North Sea
Enhanced regional imaging of Late Jurassic depositional systems across the Northern Viking Graben, Norwegian North Sea
In this paper, we present the importance of a regional dataset, acquired and processed with the latest seismic imaging technologies to better understand the depositional environments of one of the main hydrocarbon plays in the Northern North Sea – the Upper Jurassic sandstones. Here ...
Time-lapse FWI to improve understanding of superimposed reservoirs in deep offshore
Time-lapse FWI to improve understanding of superimposed reservoirs in deep offshore
Superimposed reservoirs are common in oil and gas production, but they are challenging to monitor with time-lapse seismic imaging. A common seismic attribute used for assessing reservoir evolution during production is the time-shift measurement which is obtained comparing two 3D seismic images. In the ...
Revealing The Unseen Mud Diapir Through OBN Data: A Case Study in Yinggehai Basin
Revealing The Unseen Mud Diapir Through OBN Data: A Case Study in Yinggehai Basin
Yinggehai basin is one of the most important basins of the South China Sea for its mega gas reservoirs and exploration potential. Vintage seismic data generally suffers severely from complex structures, including diapir formed by thermal fluids, strong shallow gas fields, and complex faulting ...
Santos Basin: Understanding the CO2 exploration risk with ultra-deep seismic
Santos Basin: Understanding the CO2 exploration risk with ultra-deep seismic
An increasing number of discoveries with high CO2 content offshore Brazil highlight a new exploration risk for the pre-salt play. New seismic data is fundamental to understanding deep geological features to address this risk. CGG’s Nebula-C data set provides images down to 20 km ...
Dynamic resolution TLFWI for velocity model building beyond the reach of diving waves
Dynamic resolution TLFWI for velocity model building beyond the reach of diving waves
Dynamic Resolution Time-Lag FWI (DR-TLFWI) aims to use both diving waves and reflections for velocity update with optimized low- and high-wavenumber components from shallow to deep section. The proposed method builds contrast into the velocity model, enabling the simulation of reflections. The iterative velocity ...
The road to 200Hz FWI using hybrid streamer and Node acquisition over Nordkapp
The road to 200Hz FWI using hybrid streamer and Node acquisition over Nordkapp
The Nordkapp Basin is a large under-explored salt basin of the Barents Sea. Despite several exploration campaigns over the past decades, no successful drilling was achieved. A new hybrid survey combining streamers and nodes was acquired in 2021 to unlock this new play. Sparse ...
Future Energy: Imaging hidden lithium-rich brines with satellite imagery
Future Energy: Imaging hidden lithium-rich brines with satellite imagery
The salars of the Lithium Triangle in South America contain approximately 55% of the world’s lithium resources (Cabello, 2021; Schulz et al., 2017). The source, transportation and concentration of the lithium-brines involves a complex mineral system that is dependent upon climate, weathering, basin closure ...