Phase diagram of stable miscible displacements in layered porous media
Laboratoire Fluides Automatique et Systèmes Thermiques (Université P.&M.
Curie and Université Paris Sud associated with CNRS (URA 871).) ,
Bâtiment 502, Campus Universitaire, 91405 Orsay Cedex, France
2 Department of Chemical Engineering, University of Southern California, Los Angeles, CA 90089-1211, USA
Accepted: 9 September 1996
We study miscible fluid displacement in heterogeneous porous media, in the presence of gravity, where the heterogeneity consists of multiple layers. Miscible fluids of different density and viscosity contrasts are used, such that the displacement is hydrodynamically stable. Depending on the values of the control parameters, the overall fluid displacement exhibits either an enhancement of the effect of heterogeneity or a damping. For a sufficiently large viscosity and/or density contrast, the effect of heterogeneity is overcome and the multi-layer system behaves as a single homogeneous layer. We determine experimentally an associated phase diagram and compare our data to a theoretical model valid for systems of large aspect ratio.
PACS: 47.55.Mh – Flows through porous media / 92.40.-t – Hydrology and glaciology
© EDP Sciences, 1996