A New Method for Measuring Diffusion and Dispersion Coefficient of Surfactant Diffusing to Crude Oil Phase

Applying Fick's Law theory, a new formula for calculating diffusion and dispersion coefficient of surfactant diffusing to crude oil phase was deduced and validated through experiments. Heavy alkyl benzene sulfonate being as studying object, experiment that putting the same volume crude oil and surfactant solution into a column vessel with plug and then measuring the surfactant concentration at different time till the concentration is constant were carried out. And the effects of both surfactant concentration and polymer on diffusion and dispersion coefficient of surfactant were also studied; further, distribution coefficient of the surfactant to crude oil and water phase was predicted.