3D Hydro-mechanical Scenario Analysis to Evaluate Changes of the Recent Stress Field as a Result of Geological CO2 Storage

A numerical scheme coupling TOUGH2 and the hydro-mechanical simulator OpenGeoSys is used to evaluate the deformations and in situ stress changes induced by CO2 injection at a potential storage site located in the Northeast German Basin (NEGB). Scenario analysis shows that under the given assumptions the vertical displacement of the reservoir is negligible and significant changes in the recent stress field are limited to the surrounding of the injection well. The undertaken assessment is generally representative for CO2 storage in the NEGB. However, simulation results suggest that a larger modeling area needs to be considered to avoid boundary effects.