The presentation takes up the old ideas of describing porous media with several tube and network models. The well-known models received from literature gave a good concept of dewatering equilibrium resulting in capillary pressure curves and pore size distributions. However, numerical methods and measurement techniques were not sophisticated allowing to evaluate the models appropriately.

In this presentation, a numerical method based on statistics is introduced to evaluate the network model of FATT from 1956: The porous filter cake structure is implemented as matrix A which elements represent the pore size correlating with the capillary entrance pressure for each pore. The input for the calculations can be any mathematical approximation of a pore size distribution, which can be derived from capillary pressure tests or micro computer tomography (µCT) analysis of the filter cake...