Conférenciers invités
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1. Philipp Blum (KIT, Germany)
Techno-economic analysis of underground hydrogen storage in Europe
Hydrogen storage is crucial to developing secure renewable energy systems to meet the European Union’s 2050 carbon neutrality objectives. However, a knowledge gap exists concerning the site-specific performance and economic viability of utilizing underground gas storage (UGS) sites for hydrogen storage in Europe. We compile information on European UGS sites to assess potential hydrogen storage capacity and evaluate the associated current and future costs. The total hydrogen storage potential in Europe is 349 TWh of working gas energy (WGE), with site-specific capital costs ranging from $10 million to $1 billion. Porous media and salt caverns, boasting a minimum storage capacity of 0.5 TWh WGE, exhibit levelized costs of $1.5 and $0.8 per kilogram of hydrogen, respectively. It is estimated that future levelized costs associated with hydrogen storage can potentially decrease to as low as $0.4 per kilogram after three experience cycles. Leveraging these techno-economic considerations, we identify suitable storage sites .
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2. Hadi Hajibeygi (TU Delft, Netherlands)
Title Abstract
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3. Hussein Hoteit (KAUST, Saudi Arabia)
Assessment of Hydrogen Storage in Salt Caverns in Saudi Arabia
As Saudi Arabia advances toward net-zero by 2060, underground hydrogen storage in solution-mined salt caverns offers a practical path to balance renewable generation and secure industrial supply. This talk provides a concise overview focused on three themes. First, capacity assessment, estimating working gas from cavern size and safe pressure ranges, with clear allowances for cushion gas and deliverability needs. Second, thermal dynamics managing temperature swings during rapid injection and withdrawal to protect cavern integrity, maintain pressures, and sustain reliable cycling. Third, modeling and planning using fit-for-purpose simulations and streamlined planning tools, calibrated to field measurements, to set operating envelopes, compressor requirements, and daily swing. With significant salt deposits and world-class solar, Saudi Arabia is well positioned to deploy this at scale.
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4. Isabelle Moretti (E2S UPPA, France)
The H2 systems of South America
Exploration for natural H2 has begun in South America. Brazil and Colombia are the most advanced countries in this field, as the law allowing exploration is expected to be published shortly. These countries are rich in resources, so there is a lot of subsurface data available, which allows for faster progresses. H2 has been already found in wells in the Llanos (Colombia) and in the Sao Francisco Basin (Brazil). In Colombia, two sedimentary basins, the Cauca Valley and the Llanos, show surface emissions. The presence of reservoirs and seals allows us to be optimistic about the presence of accumulations. Regarding the H2_generating rocks, ophiolites and coal have been already proposed for the Cauca Paita Valley but alternatives exist for the LLanos. In Brazil and Uruguay, the system is more classicaly archean and good quality reservoirs still need to be found.
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