SIMULATION OF HETEROGENEOUS SANDSTONE EXPERIMENTS CHARACTERIZED WITH CT SCANNING

Coreflood experiments in naturally heterogeneous sandstone outcrop cor es were conducted and simulated. Displacements included waterfloods an d polymer floods containing tracers for oil or water during single-pha se and two-phase flows. Displacements of viscous polymer solution were unstable. The cores were characterized by air permeability measuremen ts on each square centimeter of each face and by computerized tomograp hy (CT) scans of core cross sections spaced I cm apart along the core length. Characterization data were used for fine-grid simulations. The agreement between the experiments and simulations is good. Simulation s with coarser-grid physical descriptions then were made by use of eff ective properties.