Elsa Moggia will work on a project concerned with compositional reservoir simulation. The main goal is fast phase-equilibrium calculations and efficient time stepping in compositional simulation. The project is developed in collaboration with Centre for Integrated Petroleum Research (CIPR), Unifob AS Bergen, Norway. Industrial partnership is provided by ENI, Milan, Italy. Elsa will stay in IVC-SEP from 1 May to the end of October 2009.