Subsurface storage plays an important role in addressing both energy transition and environmental challenges. Among the available technologies, carbon capture and storage (CCS) is emerging as a key solution for achieving climate targets and enabling deep decarbonization of hard-to-abate sectors. Alongside CO2 storage, the subsurface offers opportunities for storing natural gas, hydrogen, thermal energy, produced water, and other resources in a safe and efficient manner. 

Once a year, DTU Offshore brings together industry professionals, policymakers, regulators, and academic experts to exchange knowledge and explore new ideas. Previous editions focused on Carbon Capture and Storage (CCS) and Underground Hydrogen Storage. In 2026, DTU Offshore’s Summer School expands its scope to encompass a broader spectrum of subsurface storage technologies while maintaining a strong emphasis on CCS and the associated challenges of storage performance, monitoring, integrity, safety, and public acceptance. 

DTU Offshore’s Summer School on Subsurface Storage will provide a platform for in-depth discussions on current practices, challenges, and innovations across a wide range of applications, including: 

CO2 Storage 

• Geological CO2 storage in depleted hydrocarbon reservoirs and deep saline aquifers. 

• Offshore CO2 injection and storage operations. 

• Storage capacity assessment and site characterization. 

• Cap-rock integrity and containment assurance. 

• Legacy well assessment and monitoring for safe CO2 storage. 

• Geomechanical aspects of CO2 injection and storage. 

• Monitoring, Measurement and Verification (MMV) technologies. 

• Multiphysics and quantitative monitoring approaches. 

• AI and data-driven methods for storage optimization and history matching. 

• Risk assessment, long-term operability, and site stewardship. 

• CCS regulation, policy, public engagement, and social acceptance. 

• Bioenergy with Carbon Capture and Storage (BECCS). 

Temporary Gas Storage 

• Natural gas storage in depleted reservoirs, aquifers, and salt caverns. 

• Underground hydrogen storage in salt caverns and porous formations. 

• Compressed air energy storage (CAES). 

Thermal Energy Storage 

• Aquifer and borehole thermal energy storage (ATES and BTES). 

• Geothermal heat storage in fractured rocks and sedimentary basins. 

Emerging Concepts 

• Integrated subsurface utilization for the energy transition. 

• Coupled storage systems and multi-purpose subsurface operations. 

• Digitalization, machine learning, and autonomous monitoring of storage sites. 

• Novel concepts for long-term carbon management and subsurface energy storage. 

The 4-day programme will include lectures, discussions, practical training sessions, and field trips. Participants will gain a comprehensive understanding of how subsurface storage technologies contribute to climate mitigation, energy security, and environmental protection. In addition to technical lectures from leading experts, participants will gain hands-on experience with industry and research software used for subsurface storage assessment and operation. Practical sessions will cover geological modelling, reservoir simulation, geochemistry, geomechanics, and thermal storage modelling relevant to CO2, gas, and energy storage projects. 

The summer school welcomes students, researchers, policymakers, regulators, and industry professionals who wish to deepen their understanding of subsurface storage technologies and their role in shaping a sustainable future. 

Students can earn up to 2.5 ECTS credits. As part of the programme, participants will present a poster and deliver a 3-minute pitch. Prizes will be awarded for the best poster and pitch presentations. 

Join us from 8–11 September 2026 at DTU – Technical University of Denmark.

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