SUMMARY Marine vibrators (MVs) have emerged as a promising alternative to traditional airgun arrays, offering precise signal control, reduced environmental impact, and a broad frequency range. However, seismic interference (SI) from nearby airgun surveys poses challenges during MV acquisition. This study introduces a tailored SI mitigation strategy using an adaptive inversion-based de-blending algorithm designed to […]

SUMMARY Full Waveform Inversion (FWI) is a technique that leverages the discrepancy between modelled and observed seismic data to estimate a potentially high-resolution velocity model of the subsurface. However, due to the highly oscillatory nature of seismic waveforms, point-wise discrepancy measures are susceptible to cycle-skipping, particularly when starting from a poor initial velocity model. Over […]

SUMMARY Ocean bottom seismics (OBS) is crucial for seismic imaging and reservoir monitoring but faces challenges due to positioning errors, water velocity variations, and clock drift. These issues impact data accuracy and require correction methods very early in the data processing sequence, when de-signatured seismic traces are not available. This study introduces a method to […]

SUMMARY Across many applications in seismic processing and imaging, multi-dimensional deconvolution (MDD) appears in many forms, and over recent years, has gained much traction, particularly in the context of processing ocean bottom (OB) data. Leveraging a computational implementation that combines matrix-free time-domain multi-dimensional convolutional operators with efficient numerical optimisation schemes, we approach MDD as a […]

SUMMARY An accurate characterization of the shallow subsurface is crucial for evaluating the load-bearing capacity at offshore wind farm sites. It is widely recognized that seismic methods, particularly inversion, can significantly enhance traditional geotechnical approaches with three-dimensional information that is otherwise unavailable. A comprehensive geotechnical analysis, however, relies on several scenarios with different confidence levels […]

SUMMARY We present a novel framework for handling large, irregularly shaped and sampled, N-Dimensional seismic volumes that remains compatible with graph-flow-based seismic processing applications commonly used in our industry. Leveraging an abstract I/O framework, we demonstrate how to interconnect standard trace-wise and gather-wise processing steps with large volume-wise processing steps in a hardware-agnostic but scalable […]

SUMMARY Ultra-high resolution (UHR) seismic data has emerged as a powerful tool for enhancing quantitative ground model building, particularly in applications such as offshore wind farm planning. However, effective utilization of UHR data hinges on overcoming unique preprocessing challenges, particularly receiver de-ghosting, which is complicated by dynamic sea-surface fluctuations and receiver depth uncertainties. This paper […]

SUMMARY In recent years, deep learning (DL) has emerged as a promising alternative approach for various seismic processing tasks, including primary estimation (or multiple elimination), a crucial step for accurate subsurface imaging. In geophysics, DL methods are commonly based on supervised learning from large amounts of high-quality labelled data. Instead of relying on traditional supervised […]

SUMMARY In frontier areas, 3D seismic surveys are sometimes unavailable due to their high operational costs, necessitating the use of 2D seismic surveys. However, 2D seismic surveys are generally not ideal for accurate interpretation because of their limited spatial coverage, leading to a growing need to interpolate 2D seismic surveys to generate 3D data volumes. […]

Bergen, 28 May 2025 – Shearwater Geoservices AS (“Shearwater”) today published its first quarter 2025 results. Revenue was USD 189.4 million compared to USD 123.4 million in the first quarter 2024. EBITDA was USD 58.1 million compared to USD 15.1 million in the first quarter 2024.  Key takeaways:  Strong operational performance in line with expectations  […]