f Conceptual MMV Outline: Illinois CarbonSafe Prairie Project

The Illinois Storage Corridor project plans to mitigate CO2 emissions from multiple industrial sources in two large-scale underground storage sites. The CO2 will be sequestered around 3580 ft (∼1091 m) below the surface in a saline sandstone aquifer known as St Peter Sandstone, southern Illinois, US. The current development plan for the Illinois CarbonSafe Prairie project is to inject 8.125 million tons per annum of CO2 for a period of 20 years into the Ordovician St Peter and Everton saline sandstone formations. This paper discusses the technical steps that were taken to outline a fit-for-purpose Monitoring, Measurement and Verification (MMV) plan to address the identified risk factors of a CO2 injection operation.