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Conference Poster Year : 2015

GERICO: a knowledge base for CO2 storage risk management


Risk management for CO2 geological storage faces a number of challenges related to the very long time scales involved, to the uncertainties regarding the geological medium and the phenomena occurring, or to the lack of relevant experience for this technology. From a methodological point of view, the process relies upon classical risk management approaches applied to site-specific conditions. The ISO 31000:2009 standard, describing principles and guidelines for risk management, advocates for an iterative risk management process based upon the following steps: -Establishing the context; -Risk assessment, including the identification of risk scenarios and their analysis and evaluation through dedicated tools and models; -Risk treatment, i.e. the design and implementation of options modifying the risk level. Appropriate monitoring is required throughout this process as well as continuous communication with stakeholders. As specified for instance by the European Directive on CCS (2009/31/CE), any CO2 storage application requires both a description of measures to prevent significant irregularities and a proposed corrective measures plan. Such risk treatment measures have to match the risk scenarios seen as relevant for the considered site. GERICO (GEstion des RIsques CO2 or manaGEment of RIsks for CO2 storage) is a knowledge repository aiming at supporting site-specific management of risks, through the delivery of generic information relating to potential risk scenarios and to risk treatment measures. We have developed this repository from literature data and implemented a Web interface; a beta-version of the repository should be released by the end of Summer 2015 at It is first oriented towards a public familiar with CCS, but not necessarily CO2 storage risks specialists: the CCS scientific community, private operators, or authorities. GERICO gathers a variety of information: •Potential risk scenarios for various phases of the storage lifecycle. These scenarios are figured through bow-tie diagrams displaying accidental sequences, from primary causes to impacting phenomena; •Potential impacts on vulnerable assets; •Risk treatment measures, placed with respect to the risk scenarios. It focuses on risk treatment measures with a synthesis sheet and a list of literature resources for each. In that respect, it may be more or less considered as a counterpart for risk treatment of the BGS / IEA GHG monitoring selection tool available at This repository is an inventory, meant as generic as possible, of conceivable risk scenarios and risk treatment measures. It does not make any evaluation of the described risk scenarios, which likelihood and severity have to be specifically assessed on a case-by-case basis given local conditions of the site. In particular, the relevance of events sequences and of associated measures must be discussed for each site: some sequences or measures will not be adapted to the specific conditions encountered. The ambition of GERICO is to become a reference tool that may support the process of site-specific risk assessment and management, the documentation and communication of risk management, and guide further research where it is required. Its performance will improve with feedback from users to enrich information; especially field experience of risk management implementation would bring value in addition to the mainly theoretical data contained so far. This repository may then reflect best practices for risk management to support the deployment of CO2 geological storage.


Applied geology
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Dates and versions

hal-01195945 , version 1 (08-09-2015)


  • HAL Id : hal-01195945 , version 1


Olivier Bouc, Jean-Charles Manceau, Thomas Le Guénan, Treil Jérémie, Nicolas Chauvin. GERICO: a knowledge base for CO2 storage risk management. IEAGHG Risk Management and Environmental Research Combined Networks Meeting, Sep 2015, Southampton, United Kingdom. 2015. ⟨hal-01195945⟩


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