Présentations Colloques

    Oral Presentation
    Session 5.03: CO2 storage in deep saline aquifers and potential impacts on shallow aquifers
    Czernichowski-lauriol Isabelle
    Storing CO2 in deep saline aquifers as part of integrated territorial energy and climate plans
    CO2 Capture and Storage (CCS) is a key climate change mitigation technology, as highlighted by IPCC, UNFCCC and IEA. Geological storage of the CO2 captured at industrial facilities such as power, cement and steel plants can massively reduce CO2 atmospheric emissions and can even generate negative emissions when combined with CO2 capture i) at biomass plants (BECCS - BioEnergy with CCS) or ii)directly from the atmosphere. **Deep saline aquifers (DSA) constitute suitable widespread targets with sufficient CO2 storage capacity to enable worldwide CCS deployment. Globally there are several commercial CO2 storage projects in DSA injecting each about 1Mtpa CO2 (Norway, Canada, and soon Australia and USA). Pilots (e.g. Hontomin in Spain) and demonstration projects in other settings are currently running or planned to accelerate ‘learning by doing’ and push worldwide deployment.**The efficient and wise use of these DSA requires robust methodologies and tools for appropriate characterization and safe CO2 storage, with no harm to the local environment including the overlying potable groundwater. Extensive research since the 1990s has enabled the development of best practices, such as the FP7 ULTimateCO2 guidance report (2016). Legislation and regulations have evolved, such as the EU Directive on the geological storage of CO2 (2009) and the upcoming ISO standards for CCS.**Interestingly, CO2 storage in DSA could be combined with geothermal heat recovery, as investigated by France in the ANR CO2-DISSOLVED project, or with enhanced water recovery for producing fresh water as investigated in China and USA.**The ambition of the Paris Climate Agreement to try to limit global warming to 1.5°C calls for even stronger consideration of CCS in countries’ Intended Nationally Determined Contributions (INDCs) and in regions’ integrated territorial energy and climate plans. The H2020 ENOS project “ENabling Onshore CO2 Storage in Europe” (2016-2020), an initiative of the CO2GeoNet European Network of Excellence, will contribute to facilitating this. Indeed, CO2 storage offers more flexibility to territories for managing their CO2 emissions while contributing to local economic development. **


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