A GROWTH-MODEL FOR POROUS SEDIMENTARY-ROCKS

A growth model for porous sedimentary rocks is proposed, using a simpl e computer simulation algorithm. We generate the structure by ballisti c deposition of particles with a bimodal size distribution. Porosity a nd specific surface area are calculated varying the proportion of smal l and larger particles. Permeability and its variation with porosity a re studied, and the percolation threshold for connectivity is determin ed. The fractal nature of the pore space is also discussed. (C) 1998 E lsevier Science B.V. All rights reserved.