Stochastic reconstruction of sandstones

A simulated annealing algorithm is employed to generate a stochastic model for a Berea sandstone and a Fontainebleau sandstone, with each a prescribed two-point probability function, lineal-path function, and "pore size'' dis tribution function, respectively. We find that the temperature decrease of the annealing has to be rather quick to yield isotropic and percolating con figurations. A comparison of simple morphological quantities indicates good agreement between the reconstructions and the original sandstones. Also, t he mean survival time of a random walker in the pore space is reproduced wi th good accuracy. However, a more detailed investigation by means of local porosity theory shows that there may be significant differences of the geom etrical connectivity between the reconstructed and the experimental samples .