CASP have announced the release of their latest scientific report, which delivers the most detailed characterisation of the Triassic Bunter Sandstone Formation across the Southern North Sea — a key target for geological carbon storage (GCS).

Using over 1,000 m of logged core from nine wells, 59 petrographic and 152 SEM-EDS analyses, 1,669 XRF data points, and a 2,200+ point porosity-permeability database, the study provides high-resolution insights into the sedimentological and diagenetic controls on reservoir quality. This has enhanced CASP's regional understanding beyond the insights provided by single well studies.

Key results:

• Recognition of 15 facies in 11 facies associations and 8 depositional environments
• Depositional processes and diagenesis combine to control reservoir quality
• Compositional and lithological variations enhanced our understanding of sediment provenance & stratigraphic correlation
• High-resolution XRF data can be used for improved reservoir modelling
• Sedimentology provides insights into regional variability of sedimentary architecture and reservoir heterogeneity

Why it matters:

This work directly supports CO₂ storage site selection, injectivity modelling, and long-term containment assessment — key priorities as we scale up net-zero infrastructure in the UK and beyond.

By improving our understanding of this critical subsurface unit, we’re laying the groundwork for responsible, science-led deployment of carbon capture and storage in the Southern North Sea.

This report is authored by Michelle Shiers, Colm Pierce, Michael Pointon, Stephen Vincent and Benoit Vautravers and is released as part of a multi-disciplinary research theme focused on understanding the Bunter Sandstone Storage Complex on a regional scale.

The full report spans 599 pages, with detailed enclosures and a 382-page appendix of analytical data.

KeyFacts Energy Industry Directory: CASP