Fluid Flow Through a Crack Network in Rocks

[+] Author and Article Information
R. Englman, Y. Gur, Z. Jaeger

Israel Atomic Energy Commission, Soreq Nuclear Research Centre, Yavne, Israel

J. Appl. Mech 50(4a), 707-711 (Dec 01, 1983) (5 pages) doi:10.1115/1.3167133 History: Received February 01, 1982; Revised May 01, 1983; Online July 21, 2009


A network of cracks pervading a rock is modeled by a random distribution of two-dimensional intersecting, complex, narrow cracks. The percolation properties of the resulting network are studied as functions of the crack-area density and size of the medium. Gas flow commences at a finite value of the crack density which in Arkansas Novaculite rocks amounts according to our model to 670 cracks per cm2 . The mean probability of finding at least one crack intersecting another is 0.57 at the threshold density. Above that, the rock gas-flow permeability increases superlinearly with crack density due to the enhancement of short percolative paths.

Copyright © 1983 by ASME
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