Technical Content

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 ...

In recent years distributed acoustic sensing (DAS) using a vertical seismic profile (VSP) geometry has gained significant interest as a technology for addressing the challenges of subsurface imaging. This study presents the integration of data from 16 DAS-VSP wells for simultaneous multi-well processing using ...

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 ...

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 ...

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 ...

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 ...

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 ...