[Alumnos] Fwd: SEG Honorary Lecture 2015

[Secretaría Académica FCAG]

---------- Forwarded message ----------
From: Mariangeles Soldi <msoldi en fcaglp.fcaglp.unlp.edu.ar>
Date: 2015-08-10 14:27 GMT-03:00
Subject: SEG Honorary Lecture 2015
To: academic en fcaglp.unlp.edu.ar


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La Sociedad de Alumnos de Geofísica de la UNLP (SEG Student Chapter) tiene
el agrado de invitarlos a participar de la charla titulada "Seismic
bandwidth extension and resolution improvement: What works". La misma
estará a cargo del Prof. Sergio Chávez-Pérez, y se desarrolla en el marco
del "Honorary Lecture Program" organizado por la Society of Exploration
Geophysicists (SEG). La charla tendrá lugar el miércoles 19 de agosto a las
14.30 hs., en el Salón Meridiano.

Los esperamos!!

Sociedad Geofísica de La Plata
SEG Student Chapter


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Resumen de la charla:
>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.

Biografía:
Sergio Chávez-Pérez was born in Mexico City, Mexico, in 1960. He received a
BS degree in geophysical engineering from the National Autonomous
University of Mexico (UNAM) in 1984 and an MS in exploration geophysics
from the University of South Carolina in 1987. Chávez-Pérez began his work
as an exploration seismologist in Mexico City at the Instituto Mexicano del
Petróleo (IMP; Mexican Petroleum Institute) in 1987. In 1987–1992, he was
research associate of engineering seismology at the Center for Seismic
Research and adjunct professor of exploration seismology at UNAM. He went
back to the United States in 1992 to pursue a Ph.D. in exploration
seismology at the Seismological Laboratory of the University of Nevada–Reno
in the Fulbright-CONACYT-IIE exchange program between Mexico and the United
States (CONACYT stands for Mexico’s National Council for Science and
Technology, and IIE stands for the U. S. Institute of International
Education). Chávez-Pérez obtained a Ph.D. in December 1997. Since January
1998, he has been a research geophysicist at IMP, following technology for
IMP and PEMEX. He also has been an adjunct professor of exploration
seismology at UNAM (1999–2014) and an adjunct professor at the University
of Utah (2004–2014).



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