3-DIMENSIONAL MISE-A-LA-MASSE MODELING APPLIED TO MAPPING FRACTURE-ZONES

A numerical scheme applying the method of volume integral equations has been developed for borehole-to-borehole and borehole-to-surface modeling of the apparent resistivity response of a thin conductive body in a half-space; the inhomogeneity simulates a fracture zone in a geothermal system. The algorithm is applicable for the direct-current case when the buried electrode is either inside (mise-a-la-masse) or outside (near-miss) the body. In implementing the scheme, the integral equation is transformed into a matrix equation as a result of discretizing the inhomogeneity into rectangular cells.