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

Permanent CO₂ storage in geological subsurface structures is an efficient way for lowering emissions of greenhouse gases to the atmosphere. The Jammerbugt structure, located around 10 km offshore northwestern Jutland may be suited for permanent CO₂ storage depending on the results of future data acquisition and studies (Fig.1.1). Collection of around 1400 km of 2-D seismic data covering most of the structure in a systematic and relatively dense grid has enabled a first analysis of the structure and its storage potential (Fig.1.2). Data were collected using a 2.1 km long Sercel Sentinel SSRD streamer cable with 336 channels and using two GI airgun arrays of 2.4 to 5.8 L, respectively, operated at around 135 bar and fired in intervals of 6, 10 and 12 seconds. This yielded a nominal fold of 76, 45 and 38. Seismic quality of the reprocessed data is moderate, but the dense seismic grid over the study area enables a sufficient first characterization and mapping of the Jammerbugt structure. Seismic acquisition was restricted to water depth greater than 10 meters, and the near-shore part of the structure lacks seismic coverage.