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Bergen, 26 June 2025: – Shearwater Geoservices AS (“Shearwater”) has been awarded a 3D marine seismic acquisition contract by TotalEnergies in Sao Tome & Principe on the STP-02 Block. The two-month exploration survey off the coast of Western Africa will start early in the third quarter of 2025 using the SW Empress, one of the […]

Bergen, 20 June 2025 – Shearwater Geoservices AS (“Shearwater”) has been contracted by Equinor to perform a 4D towed streamer seismic survey over the Tyrihans field in Norway. It is the first project awarded under the 2021 Equinor frame agreement following a recent extension for an additional two years. The one-month Norwegian Sea survey commences […]

SUMMARY The Spectral-Element Method (SEM) is a high-fidelity alternative to traditional Finite-Difference (FD) methods for seismic modelling and inversion. While FD methods are computationally efficient on regular grids, they face challenges in handling complex geological interfaces, material heterogeneities, and boundary conditions. SEM, leveraging unstructured meshes and high-order accuracy, overcomes these limitations and excels in environments […]

SUMMARY We demonstrate the potential of using Deep-Learning (DL) based de-ghosting methods in marine seismic data processing. We use a field-informed synthetic modelling strategy to create a diversified training data set, and account for acquisition uncertainties such as variable depth streamer profiles, wave action and variable surface reflectivity both in 2D and 3D applications. We […]

SUMMARY Image-domain least-squares migration (i-LSM) is a powerful imaging tool that estimates a fullbandwidth reflectivity (or perturbation) model from a seismic image by means of a spatially nonstationary deconvolution process with so-called point-spread functions. However, neither a reflectivity nor a perturbation model are a direct representation of any subsurface reservoir property. In this work, we […]

SUMMARY MEMS (Micro-Electro-Mechanical Systems) -based sensors, initially introduced in seismic streamers, are now also used in Ocean Bottom Nodes (OBN) for benefits such as flat amplitude and phase spectra across the seismic bandwidth, high vector fidelity, low power consumption and more. MEMS measure acceleration and are by design without gain settings making the topic of […]

SUMMARY Site investigations, for instance, in the emerging field of CCS (Carbon Capture and Storage), benefit from improved resolution in the overburden compared to traditional seismic surveys. This is typically achieved by recording data at a 1ms sample rate. However, the resolution of the imaged data does not only depend on the resolution in time […]

SUMMARY This study introduces and evaluates two seismic time-strain inversion methods: total variation (TV) regularised inversion, and joint inversion with segmentation (JIS). Both methods effectively recover seismic time-strain while suppressing noise. Synthetic data experiments highlight the superior performance of JIS, which provides cleaner, more accurate estimates and segments strain into userdefined classes, enhancing interpretability and […]

ABSTRACT Multi-dimensional deconvolution (MDD) is a technique used at different stages of the seismic processing and imaging value chain to suppress overburden effects by deconvolving the up- and downgoing components of a given wavefield at a target of interest. Whilst the time-domain implementation has recently been identified as the de-facto solution for 2D applications, owing […]