About the CIGSS

The second Caprock Integrity & Gas Storage Symposium and Conference at the Mont Terri Rock Laboratory will take place on 27–28 January 2026 in Porrentruy and St-Ursanne, Switzerland.

The CIGSS aims at providing a platform for the exchange and discussion of scientific, technological, industrial, and regulatory advances related to the integrity of caprocks in the context of geological storage of CO₂ and gas storage in general. The specialised conference is addressed to research institutes industry and government agencies.

The event will take place over two days, on 27 and 28 January 2026. The first day is devoted to a symposium with government agencies, industry representatives and researchers. The following themes are on the agenda:

• Public acceptance
• Regulation
• Site screening and exploration
• Characterization and behavior of geological reservoirs
• Characterization and behavior of caprocks
• Key research developments of geological storage of CO₂ and other gases
• Expectation of CO₂ producers

The second day is devoted to a scientific conference, with poster session, open to researchers in the field of fault, caprock and borehole integrity and gas storage in general. We welcome contributions on the topics:

• Small-scale laboratory experiments
• Medium-scale rock laboratory experiments toward pilot-scale project
• Local and regional geological and structural investigations of potential sites
• Risk and hazard assessments
• Numerical studies
• Innovative monitoring systems and analysis strategies

The Mont Terri rock laboratory (St-Ursanne, Jura, Switzerland) is operated by the Swiss Geological Survey at swisstopo and known since 1996 for its international research on deep geological storage of radioactive waste. In that context, several experiments dealing with gas migration in claystone have been conducted, using hydrogen and other gases. The rock laboratory also holds a central position in research on the geological storage of CO₂. The Opalinus Clay shale is regarded as one of the best characterized host rocks and an ideal reference for caprocks worldwide. Dedicated experiments in the Opalinus Clay formation as a caprock have been carried out for more than a decade at Mont Terri. Therefore, swisstopo has suggested the Mont Terri site to organize and host this international symposium every two years.