Technical Content

The Sureste Basin in southeastern Mexico contains complex geological features, including extensional and compressional structures, salt deformations, rafted Mesozoic sections, and over-pressured shale diapirs. A recent onshore seismic acquisition using dynamite sources yielded lower-frequency, longer offset, full-azimuth data than previous vintages. However, permitting challenges ...

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 ...

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 ...

Distributed Acoustic Sensing on seafloor fibre optic cables (Surface DAS) provides a cost-effective alternative to Ocean Bottom Seismic. Measuring the change of a fibres optical response over time yields a record of strain along the cable, which can be converted into a seismic signal ...

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 ...