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Courses Description
& Outline
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Dr.
Victor Pereyra
Weidlinger Associates Inc.
Mountain View, CA
victor@wai.com
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3-D Seismic
Modeling
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| Course
Description
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| The seismic method
is one of the principal tools for
imaging the earth interior for hydrocarbon
prospecting. Geological modeling is
required when using numerical methods
for imaging with seismic data. The
main phenomenon modeled is the propagation
of elastic waves on a heterogeneous
complex media. For this purpose we
need to solve numerically the wave
equation. This is an expensive proposition
and as an alternative seismic ray
tracing is used for many tasks. In
this course we will describe 3D geological
modeling, numerical solution of the
wave equation, seismic ray tracing
in complex media and travel time tomography
as an imaging procedure. A computer
system that performs these tasks will
be used in the laboratory sessions.
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| Course
Outline |
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Lectures 1-2:
3D Geological modeling in blocky
media: an object oriented approach;
definition of blocky media; curve,
surface and volume representation
of heterogeneous media with B-splines
and Coons patches; least squares
approximation of discrete data.
Lecture 3:
Solving the acoustic wave equation.
Finite-difference approximations.
Absorbing boundary conditions. Model-order
reduction. Reverse time migration.
Lecture 4:
Seismic ray tracing in blocky media;
the ray equations in heterogeneous,
piecewise smooth media; shooting
and two-pointing; efficient, automatic
solution of realistic ray tracing
tasks; parallel solution of large
scale seismic ray tracing tasks.
Lecture 5:
Travel time tomography: media parameterization;
seismic inversion of parametric
media; and block parallel solution
of large-scale inversion problems.
Full waveform tomography.
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| Laboratory |
The students will
have hands on experience in the
use of a commercial package (INTEGRA,
Weidlinger Associates) and an experimental
one (GeoUC, U. de Carabobo) for
3D geological modeling, seismic
ray tracing, wave equation solution
and tomography, using synthetic
and real geology and seismic data
sets.
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SDSU: Computational Science
and Engineering Gateway to Latin America
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Last
updated:
January 22, 2010 10:15 AM
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