Berlin 2012 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: Poster: Wetting, Micro and nanofluidics
CPP 21.11: Poster
Wednesday, March 28, 2012, 11:00–13:00, Poster A
Pore Scale Investigations Of Forced-Imbibition In Porous Media — •Hagen Scholl1, Kamaljit Singh2,3, Marco Di Michiel3, Mario Scheel3, Stephan Herminghaus2, and Ralf Seemann1,2 — 1Saarland University, Experimental Physics, D-66041 Saarbrücken, Germany — 2MPI for Dynamics and Self-Organization, D-37073 Göttingen, Germany — 3ESRF, BP 220, F-38043 Grenoble, France
We investigate static and quasi-static liquid morphologies of immiscible-liquid (water-oil) fronts in an initially oil saturated bead matrix flooded by water using ultra-fast X-ray micro-tomography at the European Synchrotron Radiation Facility (ESRF, ID15). The data were analysed for change in residual oil morphologies, the shape of liquid front with time during continuous water flooding and various factors affecting its behaviour, such as wettability (glass/basalt beads), flow rates, pore geometry and the influence of gravity. Our results show that the water-oil front is more compact in basalt beads, whereas the front in glass beads progresses in elongated fingers. The fingering in the porous medium results in a higher final residual oil saturation for glass beads, after a complete water flood due to bypassing of several oil-filled pore pockets. Preliminary results indicate a crucial importance of the wettability and that the front behaviour seems to be dominated by capillary forces, whereas the flow rate doesn't play a major role.