Abstract
Modeling a faulted domain is difficult because of the multiplicity of solutions for linking traces. The use of interactive software can be very efficient if it provides the opportunity for real 3-D reasoning. The application of geometric modeling to the Soultz horst shows that GOCAD software is a powerful tool for building a realistic geometric model of fault and layer systems, since it enables the geologist to interactively identify inconsistencies between 2-D interpretations of the profiles, take into account complex morphologies such as the subdivision of a fault, and investigate as many hypotheses as needed.
