oa Statistical Anisotropy

Anisotropy in rocks arises from the heterogeneous nature of mineral rocks. This can be manifested in permeability, porosity and in velocities. In this paper it is shown that such variations can be represented by using a histogram. A perfectly isotropic medium can be represented by a single bar in the histogram while the anisotropic characteristics can be shown by the various bars of the histogram. The class width represents the scale of anisotropy while the frequency represents the relative "abundance" of each anisotropic variation in the mineral sample.