Sergio Chávez-Pérez
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| Latest company | Instituto Mexicano del Petróleo |
|---|---|
| BSc | Geophysical Engineering |
| MSc | Exploration Geophysics |
| PhD | Exploration Seismology |
| BSc university | National Autonomous University of Mexico |
| MSc university | University of South Carolina |
| PhD university | Seismological Laboratory of the University of Nevada–Reno |
Sergio Chávez-Pérez was born in Mexico City, Mexico (1960), received a B.S. degree in geophysical engineering from the National Autonomous University of Mexico (UNAM, Mexico City, MEXICO) in 1984, and an M.S. in exploration geophysics from the University of South Carolina (USC, Columbia, SC, USA) in 1987. He began his work as an exploration seismologist in Mexico City at the Mexican Petroleum Institute in 1987. Later, he was appointed research associate of engineering seismology at the Center for Seismic Research (1987-1992) and adjunct professor of exploration seismology at UNAM (1987-1992). He went back to the USA in 1992 to pursue his Ph.D. in exploration seismology at the Seismological Lab of the University of Nevada, Reno (UNR, Reno, NV, USA). He obtained his Ph.D. in December 1997 and since January 1998 is a Research Geophysicist at the Mexican Petroleum Institute (IMP), following technology for IMP and PEMEX. He has also been an adjunct professor of exploration seismology at UNAM (1999-2014; 2016- ) and adjunct professor at the University of Utah, USA (2004-2014). His areas of professional interest are seismic imaging (migration, modeling, tomography, and inversion), data processing and wavefield transformation, interpretation of seismic data for structural, stratigraphic, and reservoir and site characterization targets, and seismic wave propagation. He became an SEG (Society of Exploration Geophysicists) member in 1981 during his undergraduate years in Mexico City, was a candidate for Vice-President in 2007, served as Associate Editor for GEOPHYSICS (Case Histories, 2003-2021; Interpretation Methods 2007-2021), Assistant Editor for GEOPHYSICS (Aug 2021 - Jul 2025), Director at Large (Aug 2022 - Aug 2025), reviewer for GEOPHYSICS and INTERPRETATION, member of the AGU-SEG Collaboration Committee, Distinguished Lecturer, Distinguished Instructor Short Course (DISC) (past chair), Latin America Advisory (interim and past chair), Passive Seismic, Research (past chair), Reviews (current chair, 2025- ), and Translations (past chair) committees, and reviewer, and session & workshop organizer during SEG and IMAGE Annual Meetings. Sergio is also a member of AAPG, AGU, AMGE, EAGE, GCSSEPM, GSA, and GSH. In addition, he is also a reviewer for Arabian Journal for Science and Engineering (AJSE), Journal of Applied Geophysics, Geofísica Internacional, Nonlinear Processes in Geophysics (NPG), Geophysical Prospecting, and IEEE Trans. on Geoscience and Remote Sensing.
2015 SEG Honorary Lecturer, Latin America
Seismic bandwidth extension and resolution improvement: What works
From the standpoint of an exploration seismologist, one of the main topics of interest is seismic resolution. We all want to improve resolution by using techniques for bandwidth extension, and we tend to conclude that the apparent frequency enhancement leads to the desired resolution improvement. This lecture outlines examples of what works in current methods of frequency enhancement during acquisition, data conditioning, processing, reprocessing, advanced imaging, and postprocessing.
Standard validation of bandwidth-extension techniques is made through correlation with synthetic seismograms obtained from well-log data and tying to wells. This method is a common practice, but it is not good enough for inquiring minds because synthetic seismograms are based only on one-dimensional models and neglect the positioning and lateral changes that also need to be resolved.
I will argue that fast and easy ways of performing postprocessing frequency enhancement do not necessarily imply or much less guarantee resolution improvement. This argument is drawn from experiences with postprocessing frequency-enhancement tests that used onshore and offshore seismic data sets as well as canonical examples of analyzing simple tuning effects using synthetic seismograms.
The emphasis of the presentation is on oil and gas exploration seismology, but researchers, practitioners, and students in geology, petroleum engineering, near-surface geophysics, and earthquake seismology might also find the lecture useful.
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