  We have used three different techniques for permeability prediction from
porosity data in well PX12 at El Lago de Maracaibo. One of these techniques is
statistical and is based in Fuzzy Logic. Another has been developed by H. Pape
et al, based in Fractal Theory and the Kozeny-Carman equations, and the other
one is an empirical model obtained in 1949 by Tixier. We have used 100% of the
permeability-porosity data to obtain the predictor equations in each case. We
have found bet- ter results with the statistical approach. The results obtained
from the fractal model and the Tixier equations are similar in this case. We
have also taken randomly 25% of the data to obtain the pre- dictor equations.
In this case the best results are those obtained with fractal theory.
