Mauricio Parra, University of Sao Paulo, Institute of Energy and Environment, Sao Paulo, Brazil, Sebastián Echeverri, University of Sao Paulo, Institute of Geoscience, Sao Paulo, Brazil, Ana Maria Patino, University of Sao Paulo, Institute of Geosciences, Sao Paulo, Brazil, Edward R Sobel, University of Potsdam, Potsdam, Germany, Kerry Gallagher, Universite de Rennes 1, Rennes, France and Andres Mora Sr, Ecopetrol, Exploration Division, Bogota, Colombia