Sensitivity Analysis of CO2 Migration in Deep Saline Aquifer of Ise Bay, Japan, Using Heterogeneous and Homogeneous 2D Models Based on Depositional Facies Analysis

Abstract

Abstract To obtain some insight into CO 2 migration in a monoclinal formation and thereby provide the data for the estimation of CO 2 storage potential in Japan, this sensitivity simulation was performed. A cross-section in the Ise Bay was chosen as an example and varied parameters included residual gas saturations, injection interval length and depth. The simulation results indicated that the CO 2 migration distances would be significantly affected by the sand/shale distribution, residual gas saturation, and injection depth. Homogeneous model simulations showed considerably different migration behavior. Thus, it appears difficult to reflect the facies distributions by such models.