par ALEX. DANCHIV et DAN CAPRITA
Chargés de recherches à l'Institut de Recherches Hydrotechniques,
Bucarest
The authors present the main features of the finite element method in the direct resistivity problems. As an example, it has been computed the anomalous effect of a prism. Beforehand, the potentials computed with finite element method in a homogeneous medium have been compared with the theoretical values, in order to point out the significant errors in result. A simulation for resistivity surveying with different Wenner arrays in the case of a non conducting prism, has been performed. As a conclusion it was found that the optimum array has dimensions of the same magnitude order as the prism.