Handbook on the Field Trips to Sites of Geological Interest for Geothermal, H₂ and CO₂ Storage

Executive Summary

Deliverable D2.4 presents the handbook developed under TWINN2SET for field trips to geological and industrial sites of relevance to geothermal energy, geological hydrogen storage and CO₂ capture and storage. The handbook brings together the knowledge generated through three visits implemented during the project: the field visit in the Chania region of Crete, Greece; the industrial visit to the Dunkirk site in France; and the geothermal field visit in the Aidipsos–Kammena Vourla area in Euboea, Greece. Collectively, these visits cover complementary aspects of the sustainable energy transition, ranging from geological formations and geothermal systems to industrial-scale CO₂ capture applications.

The deliverable contributes directly to the objectives of WP2, which aimed to strengthen the scientific research and technological capacity of IG/FORTH in the fields of geological CO₂ sequestration, geological hydrogen storage and geothermal energy. In this context, the field visits were not conceived as stand-alone observational activities, but as integrated learning and capacity-building actions closely connected with staff exchanges and collaboration among consortium partners. Through this combined approach, participants were able to engage with geological settings, industrial practices, field observations and expert knowledge in a structured and practice-oriented manner.

More specifically, the handbook provides analytical field-trip guides and background information on sites of geological and technological interest, while also documenting the broader educational and collaborative value of these activities. The visits supported the exchange of best practices, enhanced understanding of relevant geological, geochemical and technological processes, and promoted interaction between researchers from Greece, Norway and France. In doing so, they contributed to the development of a stronger common knowledge base within the consortium and to the expansion of scientific cooperation beyond individual mobility actions.

Overall, Deliverable D2.4 demonstrates that the field visits successfully complemented the staff-exchange program and enriched the implementation of the research component of TWINN2SET. By linking field-based learning, industrial exposure and inter-institutional collaboration, the deliverable supports the broader ambition of the project to build research excellence at IG/FORTH and to reinforce its long-term scientific positioning in the area of sustainable energy transition.