Technical Content

In this case study, we present results from the first ocean bottom node (OBN) based 4D imaging at the Liza field, offshore Guyana. With two nominally repeated OBN surveys acquired within less than a year, we initially employed a parallel 3D processing flow to ...

An advanced imaging flow including 40 Hz full-waveform inversion (FWI), in conjunction with an industry-supported ultra-high-density survey provides a high-resolution FWI velocity model and FWI Image to resolve complexities related to the Cenozoic sedimentary fill in the Delaware Basin. The more accurate of the ...

The Laconia program marks a major advancement in the design and execution of long-offset, low-frequency (LOLF) ocean-bottom node (OBN) seismic acquisition programs for subsalt imaging in the U.S. Gulf. With more than 18,000 km²of source coverage and more than 8000 node locations, this multiphase ...

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 ...

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 ...