Identification of Potential Aquifer Recharge Sites for CO2 Storage in the Sinu-San Jacinto Basin in Colombia

Abstract

Abstract The leakage of carbon dioxide in geological storage sites is one of the main risks in carbon capture and storage (CCS) projects. Potential CCS sites in the subsurface rely on hydraulic barriers to prevent migration of stored CO2. In addition, CCS sites rely on rocks that can form stable carbonates saturated with water and in the presence of captured CO2, ensuring long-term storage. Aquifer recharge zones are areas on the Earth's surface through which water infiltrates into the subsurface. The flow of water from the surface to the subsurface helps maintain pressure in the aquifer, acting as a hydraulic barrier between the recharge zone and a potential CO2 storage site. This article aims to identify possible CO2 storage sites in aquifer recharge zones in the Sinu-San Jacinto sedimentary basin in Colombia. Potential CO2 storage zones were identified through spatial processing in a geographic information system (GIS), using a digital elevation model (DEM), available geological mapping, and land cover information. The results were compared with the aquifer recharge zone map of Colombia to identify potential CO2 storage sites.