f Case Studies for Monitoring of CO2 Storage Sites, based on Ground Deformation Monitoring with Radar Satellites

InSAR (Interferometry for Synthetic Aperture Radar) technology is a spaceborne measurement method that uses radar satellite images to detect and measure ground deformation with millimetric precision. Measurements are taken remotely from space, making this an appropriate tool for measuring ground motion in difficult to reach remote areas and in almost all weather conditions, during day or night. The Stable Point Network (SPN) is an advanced differential interferometric chain which was developed by Altamira Information in order to process several raw radar images to achieve millimetric ground motion measurements. Results are provided in GIS format and can be received and analysed by CO2 reservoir engineers remotely without the need for site visits. International case studies will be presented for three CO2-storage sites. These sites have been selected because they differ in the several criteria: Site conditions (climate, surface …), stage of CO2-injection, amount of detected ground motion, density of measurement points and cause of ground motion. To summarise, ground motion studies using InSAR technology contain valuable information for pore pressure behaviour monitoring of CO2 storage sites, especially when InSAR ground motion measurement results are inverted and used for reservoir management and history matching of geo-mechanical models.