Storage Roberto Guandalini*, Fabio Moia*, Claudia Cangiano*, Giuseppina Ciampa* CO2NET 2008 Annual Seminar Varsavia (Polonia), 22-24 Aprile 2008 POSTER SESSION * CESI RICERCA Several technological options have been proposed to stabilize and reduce the atmospheric concentrations of CO2 among which the most promising are the CCS technologies. The remedy proposed for large stationary CO2 sources as thermoelectric power plants is to separate the flue gas, capturing CO2 and to store it into deep subsurface geological formations. In order to support the identification of potential CO2 storage reservoirs in Italy, the project “Identification of Italian CO2 geological storage sites”, financed by the Ministry of Economic Development with the Research Fund for the Italian Electrical System under the Contract Agreement established with the Ministry Decree of march 23, 2006, is in progress and it will be completed in the current year. The project involves all the aspects related to the selection of potential storage sites, each carried out in a proper task. The first task has been devoted to the data collection of more than 1600 wells, and their organization into a geological data base supported by GIS, that contains information about the nature and the thickness of geological formations, the presence of fresh, saline or brackish water, brine, gas and oil, the underground temperature, the seismic velocity and electric resistance of geological materials from different logs, the permeability, porosity and geochemical characteristics. The goal of the second task was the set up of a numerical modelling tool that allows the analysis of a potential site in terms of the storage capacity, both from solubility and mineral trapping points of view, and in terms of risk assessment. This tool includes a fluid dynamic and chemical module, based on the Tough2 and ToughReact ones but improved as regards the calculation environment and CO2 modelling aspects, and a coupling module with the geomechanical simulator CANT-SD. Acquirement of geological data, definition of simulation parameter, run control and final result analysis can be performed by a properly developed graphic user interface, fully integrated and calculation platform independent. The project is then completed by a public acceptance task. The poster includes the outlines of the project, the geological data base characteristics and the description of the integrated numerical modelling tools pointed out; and shows an application to a potential site.