| Thu December 11th 2008 11:00 ZH286 | Seminar | Slow degassing and bubble migration in liquid-filled porous media Stéphane Zaleski |
Details:Primary production of oil from porous rocks involves to degassing of the light species and the formation of a bubbly phase. This process is not well understood. In this work one keeps the conventional Darcy scale point of view with relative permeabilities. The key difference however is that relative permeabilities are not fit to experiments but obtained through physically-motivated explicit formulas. These expressions or formulae are based on the analysis of the mechanism of bubble migration. The theory involves a prediction of the aspect ratio of the bubbles and their velocities, obtained based on Invasion Percolation models. One shows comparisons with a number of laboratory-scale experiments. | ||
