ERSC 3V93 Lecture Notes - Lecture 39: Electrode Array, Schlumberger
4 May 2016
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Document Summary
Two main approaches to collecting resistivity data in field: vertical electrical sounding (ves) detect vertical variations in , fix the centre of the electrode spread and systematically increase the spacing (also called. Measurements repeated as array is expanded about a fixed point, Maintaining the relative spacing of the electrodes. Used to find overburden thickness, aquifers and other horizontal structures. Several different layouts of current and voltage electrodes or arrays" have been designed. Wenner and schlumberger most commonly used best resolution of horizontal layering: wenner, schlumberger, gradient, pole dipole, dipole dipole. Two current electrodes (green) and the two potential electrodes (red) are placed in line and equidistant from one another and centred on some location separation between all electrodes ( a ) equidistant. Measurements made by expanding array about a fixed point with the the relative spacing of the electrodes kept constant. Separation distance at successive spreads is multiple of spacing a .
