Geochemical Modeling of Carbon Sequestration, MMV, and EOR in the Illinois Basin

The Illinois State Geologic Survey is conducting several ongoing CO₂ sequestration projects that require geochemical models to gain an understanding of the processes occurring in the subsurface. The ISGS has collected brine and freshwater samples associated with an enhanced oil recovery project in the Loudon oil field. Geochemical modeling allows us to understand reactions with carbonate and silicate minerals in the reservoir, and the effects they have had on brine composition. For the Illinois Basin Decatur project, geochemical models should allow predictions of the reactions that will take place before CO₂ injection begins. ?? 2009 Elsevier Ltd. All rights reserved.