Assessment of Long-term CO2 Trapping Mechanisms at the Ketzin Pilot Site (Germany) by Coupled Numerical Modelling

Abstract

To assess the long-term reservoir stabilisation at the Ketzin pilot site (Germany), the contribution of the four CO₂ trapping mechanisms (structural, residual, dissolution and mineralisation trapping) was determined by numerical modelling. In the first step, dynamic flow simulations were undertaken using a reservoir simulator. The second step comprised batch simulations applying a geochemical simulator. Coupling between both simulators was achieved by time-step dependent integration of water saturation calculated in the reservoir simulations. After a simulation time of 16,000 years, about 98.3% of the injected CO₂ is dissolved in the formation fluid and 1.5% mineralised, while residual trapping contributes with 0.2% and structural trapping is negligible.

http://dx.doi.org

10.1016/j.egypro.2013.06.460.