[en] The final objective of the work done during the last year of the CRP is to validate several models and/or software packages for the interpretation of tracer experiments in oil and geothermal fields. The interpretation of tracer experiments in such systems is much more complex that those obtained in industrial devices because oil and geothermal field are non boundary systems, little information about the internal structure is available, the curves are often incomplete, operating parameters change during the experiment and finally the percentage of tracer recovery is very low. In order to simplify the approach, the inter-comparison of the software packages has been done on the experimental data obtained previously at laboratory scale (see second CRP meeting). New perspectives for software developments have been also proposed.