An automatic kick detection software was developed to support the drilling operation in YPF's unconventional play. The software was tested off-line in seven wells. Of the 18 cases of kick occurred, 17 were correctly detected. This corresponds to an effectiveness of 94%. The false alarm frequency was of one per well drilled. This false alarm rate does not seem to undermine the reliability of the method. Although these results were obtained in only seven wells, they can be considered as promising.