The Norwegian Elephant Awakens: The CCS Reservoir for Northern Scandinavia

Kristian B. Brandsegg; Sougata Halder; Allan McKay; Bent Kjølhamar; Gunhild Myhr

doi:10.3997/1365-2397.fb2026023

E-ISSN: 1365-2397

The Norwegian Elephant Awakens: The CCS Reservoir for Northern Scandinavia
Authors Kristian B. Brandsegg¹, Sougata Halder¹, Allan McKay¹, Bent Kjølhamar¹ and Gunhild Myhr¹
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¹ TGS
Publisher: European Association of Geoscientists & Engineers
Source: First Break, Volume 44, Issue 4, Apr 2026, p. 37 - 43
DOI: https://doi.org/10.3997/1365-2397.fb2026023
- Published online: 01 Apr 2026

Abstract

The rapid scale-up of carbon capture and storage (CCS) on the Norwegian Continental Shelf requires robust, cost-effective subsurface screening, characterisation, and long-term monitoring solutions. Advances in marine seismic acquisition and processing play a central role in reducing geoscience uncertainty and accelerating storage site maturation. This article highlights recent technological achievements in CCS enablement, demonstrated by the Elephant CCS project in the Norwegian Sea, a large-scale multi-client dataset repurposed for carbon storage applications.

The Elephant project leverages modern 3D broadband seismic data processed using both pre-stack depth migration and high-fidelity velocity model building. A key innovation of the dataset used to mature the Elephant CCS site is its ability to resolve depositional architectures and stratigraphic heterogeneity relevant to horizontal permeability distribution and plume migration behaviour. Broadband processing and geomorphological interpretation provide new insights into reservoir continuity and seal effectiveness, critical for derisking site selection and informing dynamic modelling. Furthermore, the project demonstrates how multi-client seismic libraries can form a scalable foundation for future 4D seismic monitoring, establishing a baseline for time-lapse surveillance of CO2 injection.

Together, these advances illustrate how the repurposing of high-quality seismic data and state-of-the-art geophysical workflows can significantly lower entry barriers for CCS projects. The Elephant CCS project exemplifies the utilisation of high-quality seismic data combined with analytical tools and workflows for delivering fit-for-purpose subsurface intelligence to support Norway’s ambition for gigaton-scale CO2 storage and the broader energy transition.

EAGE Publications BV

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The Norwegian Elephant Awakens: The CCS Reservoir for Northern Scandinavia

First Break 44, 37 (2026); https://doi.org/10.3997/1365-2397.fb2026023

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The Norwegian Elephant Awakens: The CCS Reservoir for Northern Scandinavia

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