Technical Content

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 ...

Recent advancements in seismic technologies such as full-waveform inversion (FWI), least-squares Kirchhoff pre-stack depth migration (LS-KirPSDM), and reverse time migration (RTM) hold immense potential for mineral exploration but remain underutilized. These techniques were applied to sparse 3D seismic data from the Oak Dam IOCG ...

Permanent reservoir monitoring at Snorre provides high-quality 4D information from PP waves. However, due to the compartmentalized geology, pressure and fluid-saturation effects in the reservoir are difficult to disentangle. We describe 4D processing and imaging of PS mode-converted waves to complement the PP dataset ...

Structural distortions are frequently encountered in Abu Dhabi area with significant velocity heterogeneity and complex geological features. Due to the unique challenges, FWI often struggled to accurately resolve small-scale distortions. The hard seabed and ultra shallow water environments lead to significant noise that destabilize ...

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 ...

Cameroon’s Douala/Kribi-Campo (DKC) and Rio del Rey (RDR) basins offer significant exploration opportunities, underpinned by advanced seismic reimaging, integrated geological evaluation and modern interpretation techniques. In the RDR Basin, focus is shifting from the mature shallow Miocene-Pliocene plays to deeper Cenozoic turbidites and the ...