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Gabriel Alvarez, Elkin Arroyo, Brad Artman, James Berryman, Biondo Biondi, Liliana Borcea, Morgan Brown, Robert Clapp, William Curry, Sergey Fomel, Antoine Guitton, Seth Haines, E. Herkenhoff, Andrey Karpushin, Jesse Lomask, George Papanicolaou, Marie Prucha, Daniel Rosales, Paul Sava, Guojian Shan, Chrysoula Tsogka, Alejandro Valenciano, Eric Verschuur, and Ioan Vlad

Number 111, April 2002




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Jon Claerbout, Biondo Biondi, Robert Clapp, and Marie Prucha



Subsalt event regularization with steering filters (ps.gz 3346K) (pdf 1176K) (src 16205K)
Prucha M. L. and Biondi B. L.
Shot-profile migration of multiple reflections (ps.gz 0K) (pdf 0K)
Guitton A.
Least-squares joint imaging of primaries and multiples (ps.gz 0K) (pdf 0K)
Brown M.
Converted wave dip moveout (ps.gz 0K) (pdf 0K)
Rosales D.
Converted wave azimuth moveout (ps.gz 0K) (pdf 0K)
Rosales D. and Biondi B.
Multidimensional imaging condition for shot profile migration (ps.gz 0K) (pdf 0K)
Valenciano A. A., Biondi B., and Guitton A.


Wave-equation migration velocity analysis beyond the Born approximation (ps.gz 0K) (pdf 0K)
Sava P. and Fomel S.
Matching dips in velocity estimation (ps.gz 0K) (pdf 0K)
Clapp R. G.
Velocity estimation for seismic data exhibiting focusing-effect AVO (ps.gz 0K) (pdf 0K)
Vlad I. and Biondi B.

Time reverse imaging

Prestack imaging of overturned and prismatic reflections by reverse time migration (ps.gz 0K) (pdf 0K)
Biondi B.
Statistical stability and time-reversal imaging in random media (ps.gz 0K) (pdf 0K)
Berryman J. G., Borcea L., Papanicolaou G. C., and Tsogka C.
Reverse time migration in midpoint-offset coordinates (ps.gz 0K) (pdf 0K)
Biondi B.

Noise removal

Adaptive subtraction of multiples with the 1#1-norm (ps.gz 0K) (pdf 0K)
Guitton A. and Verschuur E.
A hybrid adaptive subtraction method (ps.gz 0K) (pdf 0K)
Guitton A.
Removal of coherent noise from electroseismic data (ps.gz 0K) (pdf 0K)
Haines S. and Guitton A.
Theoretical aspects of noise attenuation (ps.gz 0K) (pdf 0K)
Guitton A.
Removing velocity stack artifacts (ps.gz 0K) (pdf 0K)
Karpushin A.

Modeling and migration computational issues

Reference velocity selection by a generalized Lloyd method (ps.gz 0K) (pdf 0K)
Clapp R. G.
One-way wave equation absorbing boundary condition (ps.gz 0K) (pdf 0K)
Shan G.
Speeding up wave equation migration (ps.gz 0K) (pdf 0K)
Clapp R. G.
Finite-difference 2#2-x migration of unregularized seismic data (ps.gz 0K) (pdf 0K)
Vlad I.

Amplitudes and rock properties

Effect of velocity uncertainty on amplitude information (ps.gz 0K) (pdf 0K)
Clapp R. G.
An extension of poroelastic analysis to double-porosity materials: (ps.gz 0K) (pdf 0K)
Berryman J. G.
Amplitude inversion for three reflectivities (ps.gz 0K) (pdf 0K)
Prucha M. L. and Herkenhoff E. F.

Filtering and inversion

Fault contours from seismic (ps.gz 0K) (pdf 0K)
Lomask J.
Toward subsurface illumination-based seismic survey design (ps.gz 0K) (pdf 0K)
Alvarez G.
Non-stationary, multi-scale prediction-error filters and irregularly sampled data (ps.gz 0K) (pdf 0K)
Curry W.
Madagascar satellite data: an inversion test case (ps.gz 0K) (pdf 0K)
Lomask J.
Implementing non-stationary filtering in time and in (ps.gz 0K) (pdf 0K)
Alvarez G.

Passive imaging

A return to passive seismic imaging (ps.gz 0K) (pdf 0K)
Artman B.
Is 2D possible? (ps.gz 0K) (pdf 0K)
Artman B.
Coherent noise in the passive imaging experiment (ps.gz 0K) (pdf 0K)
Artman B.


WEI: Wave-Equation Imaging Library (ps.gz 0K) (pdf 0K)
Sava P. and Clapp R. G.
Displaying seismic data with VTK (ps.gz 0K) (pdf 0K)
Arroyo E. R. and Clapp R. G.
Cluster building and running at SEP (ps.gz 0K) (pdf 0K)
Clapp R. G. and Sava P.


Subsalt event regularization with steering filters

Marie L. Prucha and Biondo L. Biondi


The difficulties of imaging beneath salt bodies where illumination is poor are well known. In this paper, we present an angle-domain least-squares inversion scheme that regularizes the seismic image, tending to smooth along specified dips. This smoothing is accomplished using steering filters. We show the results of using the regularized inversion with smoothing along the angle axis and along both the angle and common midpoint axes. Additionally, the ramifications of specifying incorrect dips to smooth along will be examined. The results show that this regularized least-squares inversion does produce a cleaner, more continuous result under salt bodies. The inversion will reject incorrectly chosen dips used for the regularization.

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