Venezuelan Geophysics Congress: "Potential Study (aero-gravimetric and magnetic) in the Eastern Venezuelan Basin", 1990. VI Venezuelan Geophysics Congress: "Overpressure estimations in the Eastern Venezuelan Basin using sonic and seismic data", 1992. 1995 CSEG Annual Meeting (in Calgary), "Porosity estimation in Blackfoot field using velocity inversion", 1995. AAPG Annual Meeting (in San Antonio), "Using P-wave Attenuation as a lithology/fluid Seismic Attribute in Eastern Venezuelan Basin", 1999. Also, EAGE Paris 2000 in Paris "P-wave attenuation - A Plausible Seismic Attribute to Detect Oil&Gas in Venezuela", 2000. 1999 World Oil Magazine, "P-wave attenuation helps identify lithology and pore fluid type", Nov. 1999, pp. 75-80. XI Venezuelan Geophysics Congress, "Part I: Seismo-stratigraphic Definition of Sandstone bodies using Acoustic Inversion in Guafita field (Apure)", 2002. XI Venezuelan Geophysics Congress, "Part II: Advanced Methodology for Dynamic Variables Characterization (water-oil fluid) using a Static Model and Elastic Inversion in Guafita field (Apure)", 2002. XI Venezuelan Geophysics Congress, "Detecting New Gas Reservoirs in Santa Rosa field: Interpretation of a "petrophysical" 3D volume using Acoustic Inversion and Neural Networks", 2002. 2003 SEG Annual Meeting in Salt Lake City, "Applying Elastic Inversion and Neural Networks for detecting Gas Sands: San Joaquin field", 2003.