IJSRP, Volume 5, Issue 5, May 2015 Edition [ISSN 2250-3153]
Van-Dycke Sarpong Asare, Emmanuel Gyasi, Bismark Fofie Okyere
Abstract:
Azimuthal apparent-resistivity measurements have been conducted using two very common resistivity electrode configurations for the purpose of determining the extent to which each of the electrode arrays could elicit anisotropy information from the subsurface. Apparent resistivity sounding were conducted along four different azimuths about a common center to provide resistivity variation with azimuth. The apparent resistivities are plotted as function of azimuth in radial coordinates to produce polygons of anisotropy for each depth of investigation. On the polar diagrams, anisotropy manifests as variation from near circular to elliptic shapes with ellipses with high eccentricity depicting high anisotropy.