[Alumnos] 2012 SEG Honorary Lecturer

[Ramsis Guerrero]

Se invita a docentes, graduados y alumnos de Geofísica de cualquier
año a concurrir el MARTES 20 de NOVIEMBRE a las 11:30 horas a la charla que
brindará el Dr. Eduardo Filpo en el Salón Meridiano de esta
Facultad, en el marco de la SEG Honorary Lecture Program.

El Dr. Eduardo Filpo Eduardo trabaja actualmente como consultor geofísico de
PETROBRAS/E&P-Exploration en Río de Janeiro. Se recibió de geólogo y
se doctoró en la Universidad Federal de Bahia trabajando en
true-amplitude migration.


TÍTULO DE LA CHARLA: “IMAGE RAY TIME-TO-DEPTH CONVERSION AND MODEL RAY
APPLICATIONS"

Although the use of prestack depth migration (PSDM) images has become
a standard procedure recently, the imaging in time, associated with
time-to-depth conversion, is still largely used for two reasons: lower
cost in computational terms and it does not need an extremely accurate
velocity field. Time-to-depth conversion using Dix inversion and
vertical -stretching algorithms have restricted applicability because
they are based on the assumption of one-dimensional seismic models.

In this lecture, I explore the concept of image rays to present
techniques that assume three-dimensional, smoothed seismic models,
which are much more geological. The key is to apply an image-wavefront
construction algorithm that uses the velocity field in time. This
algorithm is used not only to trace rays and wavefronts, but also to
convert the time velocity field to depth.

In the inverse problem (i.e., the depth-to-time conversion), vertical
grid lines in depth are mapped into curves in the time domain. These
curves are determined by a differential equation that is very similar
to the eikonal equation. Because of this similarity, I suggest
denominating them model rays. Model ray tracing can be applied to
solve several problems related to depth-to-time conversion, such as
building synthetic seismograms, time conversion of PSDM images, well
calibration, and construction of hybrid migration algorithms.

Para más información:
http://www.seg.org/education/lectures-courses/honorary-lecturers/central_southamerica/preview

Sociedad Geofísica de la Universidad Nacional de La Plata.