Banca de QUALIFICAÇÃO: RAMON DE OLIVEIRA SILVA JUNIOR

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : RAMON DE OLIVEIRA SILVA JUNIOR
DATE: 20/03/2024
TIME: 11:00
LOCAL: Sala de Seminários I - DFTE
TITLE:

Derivative-free strategies in target region inversion in 4D seismic

KEY WORDS:

Inverse Problems in Geophysics, 4D Seismics, Derivative-Free Optimization.

PAGES: 20
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

In this work, we seek to address 4D seismic inversion using computational derivative-free optimization strategies.
This problem consists of discovering variations in some target region of the subsurface, comparing two seismic acquisitions in
the same area, recorded with a time interval between them. The process of performing acquisitions and imaging them can be carried out by optimization, iteratively minimizing the difference between seismic data produced via a proposed model and

empirical seismic data. These techniques are generally time-consuming, as most algorithms have a large computational cost
and are limited to finding local minima. The derivative-free optimization strategy consists of searching for the global minimum
by extensive search, but without using the gradient of the optimization function. This form encompasses sophisticated forms of
scientific computing in the search for the global minimum of the optimization function.

COMMITTEE MEMBERS:
Presidente - 2492756 - JOAO MEDEIROS DE ARAUJO
Interno - 1345774 - CLAUDIONOR GOMES BEZERRA
Interno - 2411793 - LEONARDO DANTAS MACHADO