Storage of energy and carbon dioxide in subsurface geological formations has been identified as key for future systems relying on renewable, zero carbon power and heat generation. All subsurface storage systems rely on the properties and integrity of the reservoir and its confining units under thermal, mechanical, hydraulic and chemical stress. Natural analogues have provided evidence for the feasibility of long-term containment of methane and carbon dioxide in geological formations and may offer similar insights for energy and heat storage.

This session addresses storage of fluids in geological systems at all scales, from laboratory experiments to full-scale storage projects. Individual studies, initiatives and active projects integrating elements of the storage chain are invited as well as field projects focused on geological storage. Managed aquifer recharge is also within focus if the stored water is used in an energy context.

Relevant topics include but are not limited to:
• Regional and local characterization of storage formations and their behaviour during injection and storage, including long-term response
• Identification and determination of key site parameters for energy storage, mechanisms for trapping and recovery efficiency
• Characterization of reservoir and cap-rocks and their fluid-flow properties with respect to hydrogen and carbon dioxide
• Evaluation of available infrastructure and injection strategies
• Geophysical and geochemical monitoring for safe and cost-efficient storage
• Coupling of different types of energy storage in a carbon neutral energy system
• Heat storage systems.
• Energy and carbon storage scenarios as pathways for a low carbon future
• Public perception of energy and carbon storage

Suitable contributions can address, but are not limited to:
• Field testing and experimental approaches aimed at characterizing the site, its key characteristics and the behaviour of the injected fluid.
• Studies of natural analogue sites and lessons learnt from them for site characterisation and monitoring techniques.
• Laboratory experiments investigating fluid-rock-interactions and potential issues arising from these
• Numerical modelling of injectivity, fluid migration, trapping efficiency and pressure response. Simulations of geochemical reactions, for evaluation of long-term mineralization potential.

Public information:
Please note that the live chat discussion will be in the following order, with each display being allocated 8 minutes of chat time. During each time slot the authors will introduce their work with some prepared lines. After this a discussion can take place. Note that we have to stop the discussion after the allocated time frame – ongoing discussions should be postponed until after the chat time.
We have created Skype group calls which are online after the chat time (from 12.30 onwards) were you will have the chance to continue your chat.

CO2 Storage (Skype chat from 12:30 https://join.skype.com/hbsn3ngQhV9J)

08:30 D996 Weiqing Chen, Salaheldin Mahmoud Elkatatny, Mobeen Murtaza, and Ahmed Abdulhamid Mahmoud Effect of Micro-MgO-based Expanding Agent on Rheological and UCS Properties of Well Cement at Early Age

08:38 D992 Liwei Zhang, Yan Wang, Manguang Gan, Sinan Liu, and Xiaochun Li Investigation on wellbore cement degradation under geologic CO2 storage conditions by micro-CT scanning and 3D image reconstruction

08:46 D981 Quinn C. Wenning, Antonio P. Rinaldi, Alba Zappone, Melchior Grab, Clement Roques, Ulrich W. Webber, Madalina Jaggi, Stefano M. Bernasconi, Yves Guglielmi, Matthias Brennwald, Rolf Kipfer, Claudio Madonna, Anne Obermann, Christophe Nussbaum, and Stefan Wiemer Fault hydromechanical characterization and CO2-saturated water injection at the CS-D experiment (Mont Terri Rock Laboratory)

08:54 D980 Christopher Yeates, Cornelia Schmidt-Hattenberger, and David Bruhn Potential CO2 Networks for Carbon Storage in a German Net-Zero Emission Landscape

09:02 D978 Bastien Dupuy, Anouar Romdhane, and Peder Eliasson Quantitative CO2 monitoring workflow

09:10 D977 Aliakbar Hassanpouryouzband, Katriona Edlmann, Jinhai Yang, Bahman Tohidi, and Evgeny Chuvilin CO2 Capture and Storage from Flue Gas Using Novel Gas Hydrate-Based Technologies and Their Associated Impacts

09:18 D976 Anélia Petit, Adrian Cerepi, Corinne Loisy, Olivier Le Roux, Léna Rossi, Pierre Chiquet, Audrey Estublier, Julien Gance, Bruno Garcia, Lisa Gauchet, Benoit Hautefeuille, Bernard Lavielle, Laura Luu Van Lang, Sonia Noirez, Benoit Texier, Pierre Bachaud, and Sarah Bouquet Aquifer-CO2 Leak project: Physicochemical characterization of the CO2 leakage impact on a carbonate shallow freshwater aquifer

09:26 D1015 Ulrich Wolfgang Weber, Katja Heeschen, Martin Zimmer, Martin Raphaug, Klaus Hagby, Cathrine Ringstad, and Anja Sundal Tracer Design and Gas Monitoring of a CO2 Injection Experiment at the ECCSEL CO2 Field Lab, Svelvik, Norway

09:34 D1013 Yerdaulet Abuov and Woojin Lee CO2 storage capacity of Kazakhstan

09:42 D1012 Nurlan Seisenbayev, Yerdaulet Abuov, Zhanat Tolenbekova, and Woojin Lee Assessment of CO2-EOR and its geo-storage potential in oil reservoirs of Precaspian basin, Kazakhstan

09:50 D1007 Ryan L Payton, Mark Fellgett, Andrew Kingdon, Brett Clark, and Saswata Hier-Majumder Pore Scale Analysis of Suitability for Geological Carbon Storage, Implications for the UK Geoenergy Observatories Project

09:58 D1000 Tobias Raab, Wolfgang Weinzierl, Dennis Rippe, Bernd Wiese, and Cornelia Schmidt-Hattenberger Electrical Resistivity Tomography Concept for CO2 Injection Monitoring at the Svelvik CO2 Field Lab

10:06 D979 Zhijie Yang, Zhenxue Dai, Tianfu Xu, Fugang Wang, and Sida Jia Effects of Dip-angle on the CO2-Enhanced Water Recovery Efficiency and Reservoir Pressure Control Strategies

H2 Storage and gas storage (Skype chat from 12:30 https://join.skype.com/nnDNNvsEw4zS)

10:20 D983 Katriona Edlmann, Niklas Heinemann, Leslie Mabon, Julien Mouli-Castillo, Ali Hassanpouryouzband, Ian Butler, Eike Thaysen, Mark Wilkinson, and Stuart Haszeldine Seasonal storage of hydrogen in porous formations

10:28 D1006 Christopher J. McMahon, Jennifer J. Roberts, Gareth Johnson, Zoe K. Shipton, and Katriona Edlmann Geological Storage of Hydrogen: Learning from natural analogues

10:36 D993 Jonathan Scafidi, Mark Wilkinson, Stuart Gilfillan, and Niklas Heinemann Hydrogen storage in porous rocks: the storage capacity of the UK continental shelf

10:44 D1008 Juan Alcalde, Niklas Heinemann, Michelle Bentham, Cornelia Schmidt-Hattenberger, and Johannes Miocic Hydrogen storage in porous media: learnings from analogue storage experiences and knowledge gaps

10:52 D984 Elodie Lacroix, Stéphane Lafortune, Philippe De Donato, Philippe Gombert, Zbigniew Pokryszka, Francis Adélise, Marie-Camille Caumon, Odile Barrès, and Sanka Rupasinghe Development of monitoring tools in soil and aquifer for underground H2 storages and assessment of environmental impacts through an in-situ leakage simulation

11:00 D982 Richard Schultz and David Evans State-by-state comparison of off-normal occurrence frequencies for US underground natural gas storage facilities



Geothermal & heat storage (Skype chat from 12:30 https://join.skype.com/pMeHVcaQc5jL)

11:15 D986 Hanne Dahl Holmslykke, Claus Kjøller, Rikke Weibel, and Ida Lykke Fabricius Laboratory and modelling investigations of potential geochemical reactions upon seasonal heat storage in Danish geothermal reservoirs

11:23 D985 Kai Stricker, Jens Grimmer, Joerg Meixner, Ali Dashti, Robert Egert, Maziar Gholamikorzani, Katharina Schaetzler, Eva Schill, and Thomas Kohl Utilization of abandoned hydrocarbon reservoirs for deep geothermal heat storage

11:31 D991 Gabriele Bicocchi, Andrea Orlando, Giovanni Ruggieri, Daniele Borrini, Andrea Rielli, and Chiara Boschi Towards zero emission geothermal plants in the framework of the H2020 GECO project: Insights on gas re-injection in geothermal reservoir and serpentinite carbonation from batch reactor experiments


Salt research (Skype chat from 12:30 https://join.skype.com/nPYcOvp8wqUW)
11:45 D994 Martin Zimmer and Bettina Strauch Origin and evolution of gas in salt beds of a potash mine

11:53 D997 Heike Richter, Rüdiger Giese, Axel Zirkler, and Bettina Strauch Seismic surveys at an artificially created field-test cavern within a salt pillar

12:01 D988 Tobias Baumann, Boris Kaus, Anton Popov, and Janos Urai The 3D stress state within typical salt structures

12:09 D999 Alexander H. Frank, Robert van Geldern, Anssi Myrttinen, Axel Zimmer, Martin Zimmer, Johannes A. C. Barth, and Bettina Strauch Detection of mantle CO2 in an underground salt mine via long-term and high-resolution monitoring by laser-based isotope techniques

12:17 D1001 Bettina Strauch, Martin Zimmer, and Axel Zirkler The hidden CO2 – The occurrence, distribution and composition of fluids in various salt minerals

The successful implementation of safe deep geological disposal of spent fuel, high-level waste and other long-lived radioactive waste is one of the currently most pressing environmental challenges in several countries worldwide. Site exploration and assessment are primarily geoscientific tasks that require interdisciplinary collaboration of different geoscientific disciplines, like geophysics, hydrogeology, (hydro-)geochemistry, mineralogy, geomechanics, and geological as well as THMC modelling. Successful and socially accepted site selection and implementation, however, not only depend on geoscientific state-of-the-art results and R&D programs but to a large extent on well-designed public outreach and public involvement/participation activities as well as on suitable regulatory frameworks.
As for other subsurface technologies such as the storage of thermal energy and other energy carriers, or the deposition of chemotoxic waste, barrier integrity is a crucial aspect for the assessment of nuclear waste disposal. Different technical concepts in diverse geological candidate formations are being discussed. Numerical simulations, in conjunction with experimental studies are an integral part of safety and environmental-impact assessment concepts involving barrier integrity as a key component. Reliable comparative analyses of potential technological options require coupled THMC models capturing the particularities of each rock type and associated repository concept to a comparable level of sophistication. Structural as well as process complexity are often met by data scarcity and variability, necessitating the treatment of uncertainties and variability.
Aside from geoscientific and technological aspects this interdisciplinary session also addresses social and regulatory challenges by welcoming contributions from research and technical support organizations, waste management organizations, regulatory bodies, and NGOs. The session provides a platform for the exchange of i) geophysical, geochemical, geotechnical knowledge for assessing the integrity of multi-barrier systems considering equally conceptual, theoretical, computational and experimental aspects as well as ii) safety assessment strategies and tools, disposal concepts, national and transnational public outreach and involvement programs, siting approaches and relevant regulatory frameworks. Presentations related to other subsurface technologies that face comparable challenges are also welcome.

Public information:
We are organizing a ZOOM meeting to take place on May 4th. There will be an oral block running from 08:30 to 12:00 with 12 minute presentations. This will be followed by an afternoon session of Pitch Presentations running from 14:00 to 15:30. In both meetings, presentation material will be shared audio-visually. The session will remain open for chat-based discussion until about 17:00.

The programme of both sessions and the links to the ZOOM Meetings can be found here:

https://docs.google.com/document/d/16TJC7em-Grf-RCHqSnta9L7VvV3aU3bb_TRwZ79O7-8/edit?usp=sharing

The session gathers geoscientific aspects such as dynamics, reactions, and environmental/health consequences of radioactive materials that are massively released accidentally (e.g., Chernobyl and Fukushima nuclear power plant accidents, wide fires, etc.) and by other human activities (e.g., nuclear tests).

The radioactive materials are known as polluting materials that are hazardous for human society, but are also ideal markers in understanding dynamics and physical/chemical/biological reactions chains in the environment. Thus, the radioactive contamination problem is multi-disciplinary. In fact, this topic involves regional and global transport and local reactions of radioactive materials through atmosphere, soil and water system, ocean, and organic and ecosystem, and its relation with human and non-human biota. The topic also involves hazard prediction and nowcast technology.

By combining 34 years (> halftime of Cesium 137) monitoring data after the Chernobyl Accident in 1986, 9 years dense measurement data by the most advanced instrumentation after the Fukushima Accident in 2011, and other events, we can improve our knowledgebase on the environmental behavior of radioactive materials and its environmental/biological impact. This should lead to improved monitoring systems in the future including emergency response systems, acute sampling/measurement methodology, and remediation schemes for any future nuclear accidents.

The following specific topics have traditionally been discussed:
(a) Atmospheric Science (emissions, transport, deposition, pollution);
(b) Hydrology (transport in surface and ground water system, soil-water interactions);
(c) Oceanology (transport, bio-system interaction);
(d) Soil System (transport, chemical interaction, transfer to organic system);
(e) Forestry;
(f) Natural Hazards (warning systems, health risk assessments, geophysical variability, countermeasure);
(g) Measurement Techniques (instrumentation, multipoint data measurements);
(h) Ecosystems (migration/decay of radionuclides).

The session consists of updated observations, new theoretical developments including simulations, and improved methods or tools which could improve observation and prediction capabilities during eventual future nuclear emergencies. New evaluations of existing tools, past nuclear contamination events and other data sets also welcome.

Public information:
Here is instruction of a live chat,
(1) Convener’s summary at the beginning of Chat 10:45-11:00
(2) We then go each presentation for 5 minutes including discussion.
(3) Each presenter posts their own "a few sentence summary within 80 words" in total, and the discussion. Omit any greeting to save time.
(4) To save time, we even offer to post your summary when we introduce your talk if you send me before hand
Live chat schedule
10:45 Convener summary
— we present one highlight slide from each presentation and give audience to search for presentation to deeply look into.
11:00 10066 Mykola Talerko et al
11:05 15257 Joffrey Dumont Le Brazidec et al
11:10 233 Sheng Fang et al
11:15 5844 Elena Korobova et al
11:20 2252 Misa Yasumiishi et al
11:25 13220 Yuichi Onda et al (solicited/Highlights)
11:30 13965 Fumiaki Makino et al
11:35 12301 Michio Aoyama et al
11:40 22136 Yasuhito Igarashi et al
11:45 12465 Hikaru Iida et al
11:50 19250 Mark Zheleznyak et al
11:55 12477 Yoshifumi Wakiyama et al
12:00 3175 Michio Aoyama et al (solicited)
12:05 11813 Yayoi Inomata and Michio Aoyama
12:10 12627 Daisuke Tsumune et al
12:15 21319 Susumu Yamada (Masahiko Machida) et al
12:20 6987 Hikaru Miura et al
12:25 Closing remark

The session gathers geoscientific aspects such as dynamics, reactions, and environmental/health consequences of radioactive materials that are massively released accidentally (e.g., Chernobyl and Fukushima nuclear power plant accidents, wide fires, etc.) and by other human activities (e.g., nuclear tests).

In addition to hazardous aspect for human society, the radioactive materials are used as ideal markers in understanding dynamics and physical/chemical/biological reactions chains in the environment. This multi-disciplinary session gathers all these aspect.