Dr. Sid-Ali Ouadfeul is currently an associate professor at the Department of Geophysics, Geology and Reservoir Engineering, Algerian Petroleum Institute-IAP Corporate University, Algeria. He received his Engineer diploma from University of Boumerdes, Algeria, a Magister and Phd in geophysics from the Faculty of Earth Sciences, USTHB, Algeria. During his Master and doctorate research he has developed many techniques based on the fractal analysis to understand the earth underlying system. His scientific research is focused on many topics such as advanced oil and gas reservoirs characterization techniques using well logs data, reservoirs characterization using seismic data based on genetic systems. Dr. Ouadfeul is the organizer of many sessions in international conferences over the world about the understanding of chaotic systems in Geophysics.