CCS2022-2024 WP1: The Havnsø structure. Seismic data and interpretation to mature potential geological storage of CO2

Ulrik Gregersen, Henrik Vosgerau, Florian W.H. Smit, Bodil W. Lauridsen, Anders Mathiesen, Finn Mørk, Lars Henrik Nielsen, Rasmus Rasmussen, Thomas Funck, Karen Dybkjær, Emma Sheldon, Gunver K. Pedersen, Carsten Møller Nielsen, Kenneth Bredesen, Shahjahan Laghari, Maiken L. Olsen, Lasse M. Rasmussen

Research output: Book/ReportReport (publicly available)

Abstract

A new Danish Climate Act was decided by the Danish Government and a large majority of the Danish Parliament on June 26th, 2020. It includes the aim of reducing the Danish green-house gas emissions with 70 % by 2030 compared to the level of emissions in 1990. The first part of a new Danish CCS-Strategy of June 30th, 2021 includes a decision to continue the initial investigations of sites for potential geological storage of CO2 in Denmark. GEUS has therefore from 2022 commenced seismic acquisition and investigations of potential sites for geological storage of CO2 in Denmark.

The structures decided for maturation by the authorities, are some of the largest structures onshore Zealand, Jutland and Lolland and in the eastern North Sea (Fig. 1.1). The onshore structures include the Havnsø, Gassum, Thorning, and Rødby structures, and in addition the small Stenlille structure as a demonstration (pilot) site. The offshore structures include the Inez, Lisa and Jammerbugt structures. A GEUS Report is produced for each of the structures to mature the structure as part of the CCS2022–2024 project towards potential geological storage of CO2.

The intension with the project reporting for each structure is to provide a knowledge-based maturation with improved database and solid basic descriptions to improve the understand-ing of the formation, composition, and geometry of the structure. Each report includes a description overview and mapping of the reservoir and seal formations, the largest faults, the lowermost closure (spill-point) and structural top point of the reservoir, estimations of the overall closure area and gross-rock volume. In addition, the database will be updated, where needed with rescanning of some of the old seismic data, and acquisition of new seismic data in a grid over the structures, except for the Inez and Lisa structures, which have sufficient seismic data for this initial maturation.

The reports will provide an updated overview of the database, geology, and seismic interpre-tation for all with interests in the structures and will become public available. Each reporting is a first step toward geological maturation and site characterization of the structures. A full technical evaluation of the structures to cover all site characterization aspects related to CO2 storage including risk assessment is recommended for the further process.
Original languageEnglish
Place of PublicationCopenhagen
PublisherGEUS
Number of pages200
DOIs
Publication statusPublished - 8 Dec 2023

Publication series

SeriesDanmarks og Grønlands Geologiske Undersøgelse Rapport
Number38
Volume2023

Keywords

  • Denmark

Programme Area

  • Programme Area 3: Energy Resources
  • Programme Area 1: Data

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