- Home
- Conferences
- Conference Proceedings
- Conferences
65th EAGE Conference & Exhibition
- Conference date: 02 Jun 2003 - 05 Jun 2003
- Location: Stavanger, Norway
- Published: 02 June 2003
481 - 487 of 487 results
-
-
Prestack poststack 3D Multiple Prediction
By S. A. LevinUsing stacking velocities to generate hyperbolic prestack arrivals from poststack data, a useful and truly 3D surface-related multiple prediction is made for a stacked 3D data volume. In its small-aperture limit the method reduces to autoconvolution of each stacked trace with itself.
-
-
-
HEMNO - A Time-Imaging Operator for Pegleg Multiples in 2-D and 3-D
By M. BrownTo correctly image primary or multiple reflections in a heterogeneous earth, migration reigns supreme,
although its computational cost may be nontrivial over complex geology, in 3-D, or when a “true amplitude”
image is required. My earlier (Brown, 2002) technique to jointly image primaries and pegleg
multiples used normal moveout (NMO), because of NMO’s speed and its amplitude predictability, in
spite of its inability to account for nonflat geology.
-
-
-
Imaging the Most Bounce Out of Multiples
More LessStrong reflectors typically generate strong higher-order multiples. Since an Nth-order multiple can bounce
of a layer N + 1 times, this provides opportunities for super-resolution (and super-fold coverage) of that
layer's lithology. This paper presents the general theory for migrating all the reflections in an N-bounce
free-surface reflection to their correct bounce points.
-
-
-
Wavefield Separation, Multiple Attenuation and Migration in Terms of Local Beam Attributes
By A. DruzhininWe study a data-driven approach to wavefield separation,
multiple attenuation and migration in complex media. We
introduce a pair of offset-dependent local beam attributes
without reference to an a priori seismic model.
-
-
-
Wavefield decomposition approach upgraded for an application to multiple removal
Authors L. Pelle and F. Delprat-JannaudThe removal of multiple reflections remains a major challenge in seismic data processing. We develop
a new method, inspired by the wavefield decomposition approach developed by Nemeth3 and based on
a linearized waveform inversion to attenuate multiple reflections. Compared to Nemeth’s algorithm,
we reduce significantly the inversion CPU time by a judicious formulation of the inverse problem. The
computational cost for multiple elimination is then negligible compared to the standard linearized
inversion cost.
-
-
-
What can we do with a model of the multiples?
By A. GuittonA very popular and effective way of removing multiples is by creating a multiple model (Verschuur et
al., 1992) and using it in order to perform the attenuation of the multiples. From this multiple model,
two different strategies are possible.
-
-
-
Weighted subtraction for diffracted multiple attenuation
More LessA complex water bottom often generates multiples that consist of specular and nonspecular parts. Conventional 2D surface
related multiple elimination (SRME) generally predicts the specular part of the multiples well while the nonspecular part
(consisting of diffractions) is often not adequately predicted.
-