Heterogeneous saline formations: Long-term benefits for geo-sequestration of greenhouse gases

Publisher Summary This chapter presents reservoir performance metrics for the evaluation of CO 2 underground-storage projects. Reservoir simulation results have shown that permeability has significant effects on reservoir performance in regard to migration of CO 2 , local pressure changes in the formation and long-term status of the CO 2 . Design of Experiments (DOE) methods have shown parameter interactions with respect to reservoir performance metrics and have provided estimates for ranges in reservoir performance. If CO 2 is injected into a heterogeneous formation, the increased baffling in the formation, and reduced permeability in parts of reservoir may inhibit the flow of CO 2 towards potential leak points in the reservoir. The increased travel path of CO 2 causes increased trapping through greater reservoir contact and potentially improves the storage project. Provided an appropriate injection program overcomes injectivity issues, heterogeneous formations can enhance the opportunity for underground storage.

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