Technical Content

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 ...

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 ...

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 ...

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 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 ...

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 ...

Surface-related multiple elimination (SRME) is an effective and widely used tool for the attenuation of multiple energy in marine seismic data. However, removing multiples with SRME is still challenging in geologically complex areas, and we often observe residual multiples in such settings. Residual multiples ...

Brazilian pre-salt often exhibits geologically complex settings with many challenges for oil and gas exploration and production. One of these key challenges is the presence of igneous rocks. We analyze the ability of full-waveform inversion (FWI) to identify and detect this class of rock ...