A laboratory intercomparison test was performed where the same set of data was provided by Argentina to coordinated research projects participants. Results from using the Anduril 2.3 software on these data are displayed in Figs 85-89.

11.3.3. Discussion

The values of the obtained parameters were very similar for all the users of the Anduril software.

However, a problem was detected in relation to the computation of the ‘final time’. The strong differences in the calculated cumulative tracer recovery of well K-301 indicated that an appropriate final time must be chosen.

It is opportune to highlight that an elemental moment analysis may be used to calculate temporal and volumetric moments. The use of analytical solutions allows the number of producing layers (by a deconvolution process) to be identified and, thereby, the moments (and the associate parameters) for each layer to be calculated.

Pike time (days)

400 300 200 100 0

Argentina Brazil France Indonesia Pakistan Philippines Vietnam China

Breakthrough time (days)

4
Argentina Brazil France Indonesia Pakistan Philippines Vietnam China

1500-и 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0

Argentina Brazil France Indonesia Pakistan Philippines Vietnam China

However, it should be noted that the analytical solutions from one dimensional models are less dispersive than the reality (which is two or three dimensional). Also, the one dimensional models cannot consider the ‘areal extension’ of the tracer flow (identical to the water flow). Consequently, very important parameters such as layer thickness and layer permeability cannot be calculated.

Appendix III