%0 Journal Article
%T Le calcul des conductivit¨¦s (thermique, ¨¦lectrique,etc. ) des roches, selon la th¨¦orie d'Ondracek g¨¦n¨¦ralis¨¦e Calculating Conductivities (Thermal, Electrical, Etc. ), of Rocks by a Generalized Ondracek Theory
%A Lavaud M.
%A Grolier J.
%A Hucher M.
%A Pouliquen J. M.
%J Oil & Gas Science and Technology
%D 2006
%I Institut Fran?ais du P¨¦trole
%R 10.2516/ogst:1989003
%X On peut calculer les conductivit¨¦s (thermique, ¨¦lectrique, etc. ) des roches ¨¤ partir des conductivit¨¦s des min¨¦raux constitutifs, des fractions volumiques, de la forme des grains, repr¨¦sent¨¦e par un ellipso de moyen ¨¦quivalent(EME), et de leur orientation moyenne. La th¨¦orie pr¨¦sent¨¦e ¨¦tend aux ellipso des quelconques la th¨¦orie d'Ondracek jusqu'ici limit¨¦e aux ellipso des de r¨¦volution. A theory is presented, extending Ondracek's derivation, which is normally restricted to oblate and prolate spheroids, to any kind of ellipsoid representing the texture of the aggregate as an average equivalent shape (AES). With such a theory, the effective conductivity of any rock can be calculated from the conductivities of rock forming minerals, from the volume fractions, the lengths and orientations of the semi-axes a, b, c of the average equivalent ellipsoid determined by quantitative microscopy.
%U http://dx.doi.org/10.2516/ogst:1989003