6533b82ffe1ef96bd1294693

RESEARCH PRODUCT

Stochastic multiscale model for carbonate rocks.

subject

description

A multiscale model for the diagenesis of carbonate rocks is proposed. It captures important pore scale characteristics of carbonate rocks: wide range of length scales in the pore diameters; large variability in the permeability; and strong dependence of the geometrical and transport parameters on the resolution. A pore scale microstructure of an oolithic dolostone with generic diagenetic features is successfully generated. The continuum representation of a reconstructed cubic sample of sidelength $2\phantom{\rule{0.3em}{0ex}}\mathrm{mm}$ contains roughly $42\ifmmode\times\else\texttimes\fi{}{10}^{6}$ crystallites and pore diameters varying over many decades. Petrophysical parameters are computed on discretized samples of sizes up to ${1000}^{3}$. The model can be easily adapted to represent the multiscale microstructure of a wide variety of carbonate rocks.