Solving Seismic Inverse Problems
Friday, February 17, 2023
12:00 pm - 1:00 pm
About the Event
Seismic inversion is generally carried out by iterative data fitting in which the model updates are evaluated by solving the corresponding physics-based forward modeling. Local optimization methods are commonly used for finding an optimal model. Choice of the optimization method is also non-trivial; it depends on the accuracy and computational speed. During the last decade, we have witnessed a resurgence of data-driven methods called machine learning, which are generally agnostic to the physics of the underlying problem. Here, we discuss several hybrid data-driven and model-driven methods that can take advantage of the salient features of the two apparently different classes of methods for parameter estimation. We discuss how the unsupervised and reinforcement learning based deep neural network can be augmented with the knowledge of the physics of the problems. Our applications to seismic inversion including AVO, tomography and full waveform inversion are quite encouraging and therefore, motivate us to investigate these approaches further.
About the Speaker: Mrinal K. Sen, Jackson Chair in Applied Seismology, University of Texas at Austin
Mrinal
K.
Sen
is
a
professor
of
Geophysics
and
holder
of
the
Jackson
Chair
in
Applied
Seismology
at
the
Department
of
Geological
Sciences
and
Institute
for
Geophysics
at
the
University
of
Texas
at
Austin.
During
2013
and
2014,
Sen
served
as
the
director
of
the
National
Geophysical
Research
Institute,
Hyderabad,
India.
He
received
his
integrated
M.Sc.
degree
from
ISM
Dhanbad
and
Ph.D.
from
the
University
of
Hawaii
at
Manoa,
U.S.A.,
in
1987.
Sen
is
known
internationally
for
his
work
on
theoretical
and
computational
seismology
and
geophysical
inversion.
He
has
published
over
200
peer
reviewed
journal
papers
and
two
books
on
Geophysical
Inversion.
He
has
received
many
awards,
including
an
honorary
membership
of
the
Society
of
Exploration
Geophysicists
“for
extraordinary
contributions
as
a
geophysicist,
educator
and
author,”
the
Joseph
C.
Walter
Award
for
Research
Excellence
and
the
Distinguished
Educator
Award
at
the
University
of
Texas.
He
is
the
recipient
of
the
2018
Virgil
Kauffman
gold
medal
of
the
Society
of
Exploration
Geophysicists
for
making
significant
advancements
in
the
science
of
exploration
geophysics
in
the
last
five
years.
- Location
- Online Only
- Cost
- Free
- Contact