Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 35: Poster: Micro- and Nanofluidics
CPP 35.5: Poster
Mittwoch, 16. März 2011, 17:00–19:00, P2
Characterising residual oil saturation using X-ray micro Tomography — •Hagen Scholl1, Kamaljit Singh1,2, Marco Di Michiel3, Mario Scheel3, and Ralf Seemann1,2 — 1Saarland University, Experimental Physics, D-66041 Saarbrücken, Germany — 2MPI for Dynamics and Self-Organization, D-37073 Göttingen, Germany — 3European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
We examined water imbibition in an initially oil saturated porous medium using X-ray micro tomography at the European Synchrotron Radiation Facility (ESRF, ID15). Our aim is to characterise the residual oil saturation after a complete water flood under various flow conditions. As a porous medium with well defined pore space and wettability, we use a pile of monodisperse microspheres. Glass and basalt spheres were used for water wet and oil wet systems, respectively. To easily distinguish the aqueous phase from the oily phase, we add a small percentage of ZnI2 to the aqueous phase. After a complete water flood, the final residual oil distribution was characterised for oil globules/blobs (ganglia) type, size and spatial distribution. It was observed that the final oil saturation in a water wet system was higher due to significant by-passing of several oil pore pockets, and it seems that the flow rates do not play a significant role in the residual oil saturation.