Published on 22 January 2026

2nd Caprock Integrity & Gas Storage Symposium 2026 – Proceedings

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.

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Abstract

Considering the urgent need to reduce greenhouse gases in the atmosphere and address climate change, it is crucial to capture and store unavoidable CO₂ emissions alongside other vital emission reduction measures. Sequestration of CO₂ underground is indeed essential to achieving the carbon neutrality targets set by industrialised countries by 2050. In this context, many large-scale CO₂ storage hubs are currently being developed around the world, particularly in the United States, Europe, and China. Sedimentary basins with interconnected reservoirs are likely to host multiple CO₂ storage sites, between which pressure interference can be expected. The cumulative effect of multiple CO₂ projects in a given region may limit its overall storage capacity, potentially causing undesirable effects such as induced seismicity and caprock failure through the reactivation of critically stressed fault zones. The primary aim of the Caprock Integrity & Gas Storage Symposium (CIGSS) series is therefore to provide a platform for the exchange and discussion of scientific, technological, industrial and regulatory advances related to caprock integrity, while also focusing on CO₂ injection into reservoirs.

Intentionally organised in Saint-Ursanne with the support of the Mont Terri underground rock laboratory and its partners, the CIGSS series benefits from the invaluable knowledge and contributions of the radioactive waste disposal community. Their experience is particularly invaluable when it comes to gas migration, such as the production of hydrogen by canister corrosion in low-permeability rocks, such as claystone. This rock is a promising host for nuclear waste disposal and a safe caprock for CO₂ and hydrogen storage.

In summary, the two-day 2nd CIGSS conference is organised around five core themes:

  • Small-scale laboratory experiments
  • Importance of faults for CO2/gas storage
  • Numerical modelling and simulations
  • In-situ measurements
  • Monitoring and new technologies

The core themes will enable practitioners and researchers from a variety of backgrounds to overcome current knowledge barriers and establish a framework for evaluating caprock integrity in claystone, potentially increasing public acceptance of geological gas storage.
The CIGSS programme will also include five keynote lectures, a guided tour of the Mont Terri underground rock laboratory, and a symposium dinner in Porrentruy.

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