Technical Content

Using modern HR FWI for reflection data up to 15Hz and above, in a shallow land environment with limited offset, is a challenge. In particular, without an accurate shallow initial model, HR FWI will have a limited reliability to initiate its process of frequency ...

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 ...

The emergence full-waveform inversion (FWI), such as Time-lag FWI (TLFWI), has enabled the production of high-resolution velocity models and FWI Images in offshore salt settings. However, consistent success with FWI for onshore data has been elusive, as land seismic data often has a low ...

Land Full-Waveform Inversion holds great potential confirmed by recent results, nevertheless, securing well acquired data is imperative for optimal outcomes considering the complexities of near surface geology. Enhanced land FWI performance arises from nodal acquisitions incorporating blending and compressive sensing, offering continuous recording, longer ...

The West Africa Atlantic margin is characterized by complex geology and their associated imaging challenges. In this case study, the basin developed from the Late Jurassic to the Early Cretaceous period, showing an example of continental rifting and break-up with strong volcanism affecting the ...

Elastic full-waveform inversion (FWI) is becoming more frequently used in compressional velocity (Vp) model building. However, the inversion of shear-waves in elastic FWI is more challenging. Here, we propose a methodology to update a high-resolution shear-wave velocity (Vs) model with elastic FWI, driven largely ...

For shallow injectite reservoir monitoring using narrow azimuth towed streamer data, 4D full-waveform inversion (FWI) improves production monitoring and correctly identifies two separate softening responses, which can be correlated with gas injection and gas exsolution. In addition, a previously unidentified softening response is also ...

Carbon sequestration monitoring demands high-resolution imaging to ensure conformance and containment of the injected CO2. This requires good imaging of the reservoir, CO2 plume, CO2 migration pathways, and depositional features, as well as detailed mapping of the overburden, to detect small volumes of CO2 ...

Up/Down Deconvolution (UDD) is valuable in the field of time-lapse (4D) seismic imaging in a marine environment, as it recovers Earth s reflectivity free from changeable factors such as water column variability and source variability. UDD is very sensitive to the accuracy of the ...