[Alumnos] Fwd: Charla Dr. Mauricio Sacchi - Viernes 15, 14hs

[Secretaría Académica FCAG]

*La Sociedad de Alumnos de Geofísica de la UNLP (SEG Student Chapter) tiene
el agrado de invitarlos a participar de la charla titulada "Practical
aspects of regularization and interpolation of (5D) seismic data". La misma
estará a cargo del Dr. Mauricio Sacchi, egresado de la UNLP y actualmente
investigador de la Universidad de Alberta, Canadá, y se desarrolla en el
marco de las "Honor**ary Lectures" organizadas por la Society of
Exploration Geophysicists (SEG).*

Los esperamos!!

*Resumen de la charla:*
Multidimensional reconstruction methods have become an integral component
of seismic data processing workflows. Reconstruction is an important
data-preconditioning module that has become a standard step before imaging
and amplitude variation with azimuth studies. Reconstruction is also
becoming of significant importance at the time of correcting for survey
irregularities. In addition, under extraordinary conditions, reconstruction
could serve to decrease acquisition costs. This talk examines current
strategies and algorithms for prestack seismic data reconstruction. I will
pay particular attention to techniques that are used to reconstruct 5D
prestack data volumes. In other words, I will discuss the reconstruction of
seismic data that depend on four spatial dimensions (for instance, offset,
azimuth and inline and crossline midpoints) and time.
I will discuss methods that take advantage of sparsity in the wavenumber
domain and connect them to current efforts in the area of compressive
sensing. I will also discuss the importance of grid irregularity to avoid
the aliasing problem and anti-alias strategies for surveys that are
acquired on regular grids. The talk will also examine recent developments
and applications of reduced-rank methods for simultaneous reconstruction
and denoising. Examples will illustrate the impact of reconstruction on
imaging and amplitude variation with azimuth studies. Finally, I will
discuss limitations of current reconstruction algorithms and present new
lines of study that could permit to couple reconstruction methods to
optimal acquisition design.

*Biografía:*
Mauricio D. Sacchi was born and raised in Coronel Brandsen (Buenos Aires),
Argentina. He received a diploma in geophysics from The National University
of La Plata, Argentina, in 1988 and a PhD in geophysics from UBC, Canada,
in 1996. He joined the Department of Physics at the University of Alberta
(Edmonton, Canada) in 1997. His research interests are in the area of
signal analysis and imaging methods. He directs the Signal Analysis and
Imaging Group, an industry-sponsored initiative for advanced research in
signal processing and imaging. He has developed and taught short courses
for the industry and for SEG, CSEG, and EAGE in seismic signal theory,
transform methods for signal enhancement, seismic inversion, and
multidimensional data reconstruction. With Tad Ulrych, he wrote the book
Information-based processing and inversion with applications (Elsevier).
Mauricio is a member of SEG, CGU, CSEG, EAGE, and IEEE. He is the recipient
of the 2012 CSEG Medal, the highest award that the Canadian Society of
Exploration Geophysicists bestows.



-- 
Secretaría Académica
Facultad de Ciencias Astronómicas y Geofísicas
Universidad Nacional de La Plata
Teléfono: +54-221-423-6592 Int. 110
Fax:        +54-221-423-6591
mail:        academic en fcaglp.unlp.edu.ar
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