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Simulation of CO2 distribution at the In Salah Storage Site using high-resolution field-scale models
Simulation of CO2 distribution at the In Salah Storage Site using high-resolution field-scale models

1st September 2010

Organisation(s): Statoil, The Permedia Research Group

Topic(s): Carbon capture, CO2 storage, Engineering and project delivery, Use and storage (CCUS)

This report describes the use of an invasion percolation modelling approach to simulate the CO2 migration process at the Krechba field of the In Salah Storage Site in Algeria. The field-scale model involves 56 million cells with dimensions of 10x10x2 meters. This high-resolution model captures the reservoir heterogeneity with respect to both the fault and fracture distributions. The simulation results are reasonably consistent with the inferred CO2 distribution after 5 years of injection, and indicate that the current distribution of CO2 is principally related to the fracture network. Initial results for predictive simulations of the post-injection period are sensitive to, and principally constrained by, the fault distribution and the multiphase flow behaviour. The simulation results highlight the role that high-resolution heterogeneous field-scale models can play in developing a comprehensive storage monitoring program.

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