Pore size distribution from challenge coreflood testing by colloidal flow

► Determination of pore throat size distribution from colloidal flow in porous media. ► A new method of the challenge testing for long porous columns (cores). ► New basic equations and boundary conditions for size exclusion colloidal flow. ► Geometrical model of pore throats based on Descartes theorem. ► Good match between laboratory and modelling results validates the proposed method.