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1-7 of 7
Keywords: residual curvature
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Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5848366
... present for a narrow range of incident angles (i.e., <30°), and (2) in the presence of migration velocity error, residual curvatures of subsalt events are often degraded due to interference caused by wavefronts propagating from different surface offsets. The degradation resulting from offset...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0847
... is introduced in 3DVSP velocity analysis. Firstly ADCIGs are formed and their residual curvatures are computed after migration. Secondly the velocity spectral function can be calculated by residual curvatures of ADCIGs and then the ratio ? of estimated velocity to true velocity can be obtained. Thirdly...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-3393
..., and uses the correct relationship between residual curvature and velocity perturbations. This avoids the inconsistency of vertical updating which updates the velocity in a different manner from how the velocity is used for imaging. The resulting interval velocity model satisfies all available information...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-3095
... velocity model can be obtained for a different parameter by minimizing the residual curvature of the downward continued wavefront at zero o set. The approach is applicable to laterally inhomogenous models and its applications indicate that it it can be applied for a relatively wide range of offsets...
Proceedings Papers
Volker Dirks, Bin Wang, Duryodhan Epili, Dan Wheaton, Patrice Guillaume, Francois Audebert, Nicolas Cahzalnoel
Publisher: Society of Exploration Geophysicists
Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-2538
... upstream oil & gas residual curvature information tom 1 picking annual international meeting semblance workflow seg houston 2005 tomography model building reservoir characterization velocity model reliability estimation rc pick inversion curvature guillaume velocity field...
Proceedings Papers
Patrice Guillaume, François Audebert, Bernard David, Ariane Herrenschmidt, Xiaoming Zhang, Philippe Berthet
Publisher: Society of Exploration Geophysicists
Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-0718
... Summary We present a finite-offset method for performing a nonlinear tomographic inversion of either the optimal alignment or the smallest residual curvature, as picked from a CRP-scan. This method is used for estimating laterally heterogeneous velocities as well as weak transverse isotropy...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-1801
... ABSTRACT No preview is available for this paper. base salt illumination velocity model iteration seismic theory 13 illumination study velocity estimation residual curvature wyatt imaging horizon traveltime upstream oil & gas velocity field procedure grid psdm depth...