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Keywords: mode conversion
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Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5905307
..., this occurs primarily due to high angle S-to-P mode conversion at the sea bed of upcoming shear energy. In this case, the upcoming shear is generated at the high velocity contrast layers (e.g. Jones 2013). In deep water salt provinces, similar contamination often occurs due to mode conversion at steeply...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0920
... of the weathered layer. pswave refraction vertical component shear-wave splitting analysis seg houston 2013 receiver function mode conversion headwave weathered layer radial component reservoir characterization polarization upstream oil & gas conversion cimarex energy transverse receiver...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1291
... Summary The impedance contrast of a salt/sediment interface can generate significant wave mode conversions in seismic reflection data. The salt-related converted waves (C-waves) travel at different velocities than pure-mode compressional (P) waves and thus generate artifacts if migrated...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0517
... in the precritical regime. The formulation permits several observations pertinent to AVO to be made, regarding 1. The non-negligible importance of target V P to mode conversions, i.e., the angle dependence of R PS ; 2.The importance of the number V P V S = 2 to all elastic reflection coefficients; 3...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2747
... the level of the recorded data. This second category of noise is of course caused by the geology and comprises mode conversions at interfaces, scatter, refractions, multiples, trapped energy, anisotropy, and complex overburdens. recent innovation calvert implementation seismic technology...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0987
... conversion which is of sufficient quality to accurately map and study the over-pressured tight gas interval. This study provides strong support for the use of P-S mode conversion imaging in the exploration and development of tight gas sand reservoirs. vsp data tight gas sand upstream oil & gas...
Proceedings Papers

Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-1686
... and Biot's slow wave, which attenuates rapidly with distance from the inclusion and represents the main difference with the elastic case. This contribution concentrates on the attenuation effects caused by the mode conversion into Biot's slow wave. The obtained solution for Biot's slow wave is well described...
Proceedings Papers

Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-1413
...-wave cross-levee tomography. While the P-wave methods provided reasonable results, the S-wave methods produced surprising Vs properties. The reason for the latter effect is not clear; possibly the result of mode conversion, which is likely at sites with Poisson's ratio greater than 0.438. Alternatively...
Proceedings Papers

Paper presented at the 2003 SEG Annual Meeting, October 26–31, 2003
Paper Number: SEG-2003-1813
... Summary The deep offshore of the Gulf of Guinea is a challenge to seismic processing and imaging techniques, due to the complexity of the salt body structures and the omnipresence of mode conversions that mask the primary signal. Even though true (Kirchhoff) prestack time migration can...
Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-1195
... to minimize the effects of these obstacles? upstream oil & gas requirement objective 4-line swath log data san antonio reservoir characterization seismic survey feasibility study exposition ob feasibility test simulation modeling seg int attenuation mode conversion noise seismic...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-1170
... Summary A study of wave-mode conversion that occurs at the sea floor for downgoing seismic energy and a comparison with reflected conversions at a representative interface of Tertiary sediments is presented. To investigate if the presence of Swaves on the vertical component (and P-wave...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0613
... prestack depth imaging mode conversion depth image mississippi canyon area depth imaging issue technique result prospect migration central gulf upstream oil & gas reservoir characterization imaging process imaging depth imaging velocity model Subsalt Depth Imaging Issues, Techniques...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0774
... of CFP-migration is most favorable in the situation of mode conversion: the operator for focusing in detection may address another wave type than the operator for focusing in emission, without making the migration algorithm more complex. In addition, operator updating may replace velocity updating...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-1185
.... upstream oil & gas mode conversion mode processing well location anisotropic processing calibration internat reservoir characterization anelastic model mtg shear velocity expl geophy imaging moveout geophy correction anisotropy thomsen simulation nmo correction Borehole-calibrated...
Proceedings Papers

Paper presented at the 1999 SEG Annual Meeting, October 31–November 5, 1999
Paper Number: SEG-1999-1311
... ABSTRACT No preview is available for this paper. mode conversion coherency optimization amplitude spectral ratio reservoir characterization geometry frequency extrapolation upstream oil & gas walkaway real data seg 1999 multi-ratio algorithm semblance compensation...
Proceedings Papers

Paper presented at the 1999 SEG Annual Meeting, October 31–November 5, 1999
Paper Number: SEG-1999-0703
... ABSTRACT No preview is available for this paper. mode conversion correction reflection point ccp receiver semblance upstream oil & gas reflector conversion point position conversion point anisotropy reservoir characterization variation seg 1999 time slice velocity...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-2091
... ABSTRACT No preview is available for this paper. seafloor upstream oil & gas component seismic test gulf mode conversion cable mexico geophone dominantly salt body imaging vertical geophone receiver line gulf s-wave energy towed streamer operation operation mahogany...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-1340
... ABSTRACT No preview is available for this paper. reservoir characterization mode conversion top basalt refraction upstream oil & gas base basalt basalt basalt layer velocity trend wave equation demultiple semblance plot multiple energy water bottom multiple head wave...
Proceedings Papers

Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-1547
... genetic algorithm algorithm machine learning mode conversion inversion woodbine sand reservoir characterization reflectivity method angle gather ST 4.3 Some practical aspects of prestack waveform inversion of seismic data Subhashis Mallick*, Western Geophysical SUMMARY In this paper, a prestack...
Proceedings Papers

Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-1092
... ABSTRACT No preview is available for this paper. compressional velocity free surface multiple upstream oil & gas ray path migrated model data artifact conversion modeling velocity model mode conversion application reservoir characterization point-source response reverse...

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