PORE-SCALE INTERFACIAL VELOCITY MEASUREMENT: AN EXPERIMENTAL INVESTIGATION OF IMMISCIBLE DISPLACEMENT IN POROUS MEDIA

threshold technique An experimental test cell was designed to study immiscible displacement in porous media at the laboratory scale. Multiphase, immiscible, low Re flow through a simulated porous media was studied. The test cell has a lattice type pattern of pore bodies interconnected by angular capillary throats of various in sizes. The flow loop uses two working fluids, aqueous sodium iodide solution, the defending fluid and air, the invading fluid. An index of refraction matching technique is used to reveal the interfacial boundary between the defending and invading fluids. The test cell is oriented horizontally in order to make the Bond number negligible. A Difference Threshold Technique was developed to measure the pore-scale velocity of the displacement interface. *Corresponding autho