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A TEST CASE FOR MULTI-SPECIES REACTIVE-TRANSPORT IN HETEROGENEOUS POROUS MEDIA APPLIED TO CO 2 GEOLOGICAL STORAGE

We present a synthetic test case permitting the validation of numerical methods for reactive transport applied to CO2 geological storage. It is inspired by a benchmark and integrates also characteristic elements of the application. We introduce two geometrical configurations in 1D and 2D with their heterogeneous geological properties. A chemical system modelling the reactions between several chemical species completes the model. The first numerical results show that reactive phenomena are quite localised in time and space. We are especially interested in time-space domain-decomposition methods which provide several advantages. Using a global solver on every subdomain, we obtain interesting properties like convergence speed and stability. Moreover, domain-decomposition methods are predestinated for massively parallel computers. As the considered problem is coupled and highly non-linear, very few theoretical results are available.