Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 44: Micro- and Nanofluidics I
CPP 44.10: Vortrag
Donnerstag, 17. März 2011, 16:30–16:45, ZEU 160
Dynamics of Forced-Imbibition in Porous Media — •Kamaljit Singh1,2, Hagen Scholl2, Marco Di Michiel3, Mario Scheel3, Stephan Herminghaus1, and Ralf Seemann1,2 — 1Max Planck Institute for Dynamics and Self-Organization, D-37073 Goettingen, Germany — 2Saarland University, D-66041 Saarbruecken, Germany — 3European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
We used ultrafast X-ray micro-tomography at the European Synchrotron Radiation Facility (ESRF, ID15) to observe the three-dimensional dynamic behaviour of water-oil fronts during a water flood into an initially oil filled porous medium. This type of multiphase flow is similar to a situation which can be found for oil recovery or soil decontamination. We characterised the pore and throat parameters of the porous media, and analysed the water-oil front behaviour at pore scale for various factors, including wettability of porous matrix, flow velocity and porosity. The dynamic experiments reveal that in an oil-wet medium, the water-oil front is more compact, however the front in a water-wet porous medium progresses in elongated fingers. The fingering in water-wet porous medium results in a higher final residual oil saturation after a complete water flood due to by-passing of several oil-filled pore pockets. We will compare the experimental results for various parameters with models developed from pore-throat characteristics.