Open AccessFractal pore structure of sedimentary rocks: Simulation by ballistic deposition
Author(s) -
Dutta Tapati,
Tarafdar S.
Publication year - 2003
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2001jb000523
Subject(s) - fractal , fractal dimension , porosity , sedimentary rock , characterisation of pore space in soil , geology , deposition (geology) , porous medium , mineralogy , diffusion , microstructure , materials science , geotechnical engineering , thermodynamics , physics , geomorphology , composite material , geochemistry , mathematical analysis , mathematics , sediment
Experimental studies show that porous sedimentary rocks have a fractal pore‐grain interface. The bidisperse ballistic deposition model (BBDM) generates a porous structure by computer simulation. The model is able to reproduce the behavior of several macroscopic properties of sedimentary rocks quite well. In the present paper we show that the microstructure of the pore space created in BBDM is also realistic. Two‐point correlations of the pore space agree qualitatively with results for real rocks, and the sample spanning pore has a fractal dimension in the range 2.29–2.99 for different porosities. We also study diffusion in the pore space by a random walk and show that it is anomalous at low porosities.