Small geological features manifest themselves in seismic data in the form of diffracted waves, which are fundamentally different from seismic reflections. Using two field data examples and one synthetic example, we demonstrate the possibility of separating seismic diffractions in the data and imaging them with optimally chosen migration velocities. Our criterion for separating reflection and di...

Seismic tomography models of the three-dimensional upper mantle velocity structure of the Mediterranean-Carpathian region provide a better understanding of the lithospheric processes governing its geodynamical evolution. Slab detachment, in particular lateral migration of this process along the plate boundary, is a key element in the lithospheric dynamics of the region during the last 20 to 30 ...

This dissertation addresses the problem of interpolating irregularly spaced seismic exploration data to regular spatial locations. This problem arises in practice in three-dimensional seismic exploration in such applications as Kirchhoff prestack migration, multiple elimination, waveequation migration, and 4-D seismic monitoring. I formulate data regularization as a linear-estimation problem an...

We investigate the Gaussian beam migration of commonshot and common-receiver data. The imaging of commonshot data is useful for seismic data where the receiver coordinates are well sampled, but the source coordinates are less well sampled. By reciprocity, this approach can also be applied to common-receiver data, such as from OBS experiments where the source locations are dense but the receiver...

Both migration deconvolution (MD) and least squares migration (LSM) are capable of improving the resolution and suppress acquisition footprints in migrated images. In this paper, we investigate the relative performance of these two technologies in enhancing migration image quality, suppressing artifacts and computational efficiency. Both MD and LSM were tested on SEG/EAGE overthrust models. The...

s, 263. Escalera, A., Vazquez, M., Moreno, M. Hemdb, J., Goss, T. and Ting, C. [2013] Broadband High-Density Development Wide Azimuth: Application in the Gulf of Mexico. 75th EAGE Conference & Exhibition, Extended Abstracts. Flügel, E. [2013] Microfacies of Carbonate Rocks: Analysis, Interpretation and Application. Springer Science and Business Media. Russell, B. Hampson, D, Schuelke, J. and Qu...

Our proposal provides post-migration techniques for computing angle-domain common-image gathers (CIGs) from seismic images, extended by the subsurface offset, in relation with wave-equation migration methods. In addition to the commonly used decomposition of the scattering-angles, we associate the wave-equation migration with dip-domain image gathers as well. Our methodology suggests a system o...

Two-and three-dimensional depth migration can be performed using one-and two-dimensional extrapolation digital lters, respectively. The depth extrapolation is done, one frequency at a time, by convolving the seismic waveeeld with a complex-valued, frequency-and velocity-dependent, digital lter. This process requires the design of a complete set of extrapolation lters, one lter for each possible...