Two phase partially miscible flow and transport modeling in porous media: application to gas migration in a nuclear waste repository

摘要

We derive a compositional compressible two-phase, liquid and gas, flow modelfor numerical simulations of hydrogen migration in deep geological repositoryfor radioactive waste. This model includes capillary effects and the gas highdiffusivity. Moreover, it is written in variables (total hydrogen mass densityand liquid pressure) chosen in order to be consistent with gas appearance ordisappearance. We discuss the well possedness of this model and give somecomputational evidences of its adequacy to simulate gas generation in a watersaturated repository.