D. ION, P. GEORGESCU, F. AZKI
Universitatea Bucuresti, Facultatea de Geologie si Geofizica, Bucuresti
CONTRIBUTIONS TO THE INTERPRETATION OF VES DATA
WHEN USING ARBITRARY ARRAYS
(Abstract)
In the interpretation of vertical electrical sounding (VES) data it is usual
to make up a continuous VES curve, assuming it corresponds to a Schlumberger
curve, and then interpreting it by using computer algorithms designed for Schlumberger
array. The Schlumberger array is seldom used on the field, since the small
length of the measuring line implies low potential differences between electrodes,
in the range of stray current effects. Longer measuring line is usually used,
thus the AB/MN ratio falls out of Schlumberger ratio range.
The paper shows some of the differences between the use of theoretical Schlumberger
array and an arbitrary field array. A method for calculating electric potential
and consequently apparent resistivity corresponding to an arbitrary array is
further proposed.
Key words: VES, arbitrary array, electric potential, apparent resistivity.