Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 44: Wetting, Micro- and Nanofluidics
CPP 44.10: Vortrag
Donnerstag, 14. März 2013, 18:00–18:15, H39
Dynamics of Immiscible Fluid Flow through Porous Media — •Kamaljit Singh1,2,3, Hagen Scholl3, Alen Kabdenov2,3, Marco Di Michiel1, Mario Scheel1, Stephan Herminghaus2, and Ralf Seemann2,3 — 1European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France — 2Max Planck Institute for Dynamics and Self-Organization, D-37073 Goettingen, Germany — 3Saarland University, Experimental Physics, D-66041 Saarbruecken, Germany
The pore-scale dynamic behavior of water imbibition into an initially oil filled porous medium was investigated in situ using synchrotron X-ray tomography. We investigated the effect of various factors, including wettability, viscosity and density of fluids, flow velocity and pore structure, on the quantitative and qualitative behaviour of the fronts. The findings reveal that for low capillary numbers the water-oil front behavior is independent of all other factors except for wettability. The wettability decides the nature of the front and the final oil saturation after a complete water flood. The front is more compact for small contact angles of the imbibing water phase. This compact front results in almost no oil trapping after a complete flood. However, the front roughens with increasing contact angle and progresses in elongated capillary fingers for large contact angles. The formation of fingers results in significant oil trapping (10-15%).