Features of interaction in the water-rock-CO2 system during the implementation of CCUS projects (on the example of chalk reservoirs in the Arctic sector of Western Siberia)

Abstract

The paper considers approaches to the analysis of physicochemical interactions in the water-rock-carbon dioxide system, solved by mathematical modeling and aimed at analyzing the behavior of this system during CO burial in the Cretaceous aquifers of the Arctic sector of Western Siberia. The problem was solved using the HydroGeo software package, which makes it possible to analyze the change in the chemical composition of solutions, the forms of migration of the main components of groundwater, as well as mineral equilibria both at the time of carbon dioxide invasion and when the solution reaches equilibrium.