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Velocity discrimination between primaries and multiples

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Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-3456
... reduction in land seismic data processing. However, in land data, the lack of velocity discrimination between primaries and multiples results in unacceptable results. Thus, wave equation based schemes have to be introduced. The research articles of Verschuur et al. (1992), Berkhout (1997), Weglein et al...
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0518
... section. We therefore think that there is a wide application for a multiple suppression technique using velocity discrimination between primary and multiple events. We suggest that the following, model generating, approach is more direct and often more reliable than thef-k filtering techniques common- ly...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2013
Paper Number: IPTC-16728-MS
... made in this field and several methods have been developed and applied successfully to field data. Commonly, these methods are based on various applications of the High-Fidelity Radon transform (Trad et al., 2003), assuming a velocity discrimination between primaries and multiples. In datasets...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203319-MS
..., there is little velocity discrimination between primaries and multiples with the latter being sometimes faster than the former. While standard techniques such as tau-p deconvolution or SRME, which use the reverberating aspect of multiples, are generally effective with surface related multiples, they are often...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-2699
... applicability for land multiple elimination. Model-Based Algorithms Model-based schemes for multiple attenuation are the work horse of any processing shop. They assume some degree of velocity discrimination between primaries and multiples and are commonly applied on NMO-corrected data in the CMP domain...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-2530
... mid point (CMP) do- main for multiple suppression. Multiple suppression by move-out dis- crimination is based on differences between primaries and (long pe- riod) multiples when there is a substantial velocity gradient with depth. In CMP domain velocities are apparent. The apparent velocity depen...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, January 19–22, 2014
Paper Number: IPTC-17451-MS
... data. The second approach is a 3D dip extraction and filtering technique, taking advantage of any dip discrimination between the primaries and multiples. It works on post stack and pre stack volumes. We show how the two methods are complementary and how they can be combined. The first approach can...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-0157
... the resulting multiple attenuation and vertical resolution. No improvement in multiple attenuation could be solely attributed to wide-azimuth geometry as the data set exhibited no obvious velocity discrimination between primaries and multiples. Figure 3: Time slices at 2,500 ms. Offsets up to 9,400 m (left...
Proceedings Papers

Paper presented at the 18th World Petroleum Congress, September 25–29, 2005
Paper Number: WPC-18-0880
... reflections, traditional methods of stacking out multiples by velocity discrimination does not work 2 . Reservoir Characterization Jauf Reservoir forum 4 Upstream Oil & Gas interbed multiple seismic data truncation line 6668 interpretation primary reflection Saudi Arabia government Jauf...
Proceedings Papers

Paper presented at the 1990 SEG Annual Meeting, September 23–27, 1990
Paper Number: SEG-1990-1753
... they exploit. Such a categorisation is shown in table 1. NM0 correction and stack procedures have long relied upon the moveout differences that exist between primaries and multiples. Obviously the higher the fold and the greater the offsets, the better the multiple attenuation will be. For this reason...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3590505
... efficiency. In this study, a Generative Adversarial Network (GAN) framework is proposed to separate primaries from surface-related multiples. Here, the generator is constructed by a Convolutional Auto-Encoder (CAE) network, and the discriminator is constructed by a convolutional neural network. In order...
Proceedings Papers

Paper presented at the 2002 SEG Annual Meeting, October 6–11, 2002
Paper Number: SEG-2002-2035
... to perform well in this data due to lack of velocity discrimination between primary and multiple energy. Using the Phantom Layer Analysis (see Figure 2), SEG Int'l Exposition and 72nd Annual Meeting * Salt Lake City, Utah * October 6-11, 2002 Internal multiple attenuation on land data two phantom levels...
Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-1977
... suppression depth model-based reflection multiple suppression san antonio primary reflection seismic data migration gulf discrimination reservoir characterization effectiveness geophysical service suppression An efficient 3D depth model-based, coherent noise suppression technique W. Daniel...
Proceedings Papers

Paper presented at the 2003 SEG Annual Meeting, October 26–31, 2003
Paper Number: SEG-2003-2060
... result. As velocity discrimination of primaries and multiples was not evident due to a velocity inversion in the shallow region, Radon based multiple suppression did not work and the fully data-driven approach of surface multiple removal (see e.g. Verschuur et al., 1992) has been followed. The data...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3419762
... transform seg international exposition iterative inversion equation velocity transform algorithm operator reservoir characterization upstream oil & gas reflection hessian cmp gather exploration geophysicist 10 velocity analysis primary reflection Separating primaries and multiples using...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-1242
... to this method is the requirement for knowledge of the multiple velocity field. Because it relies on moveout for discrimination between primaries and multiples, it is inappropriate for short period multiples. References Esmersoy, C, 1990. Inversion of P and SV waves from multicomponent offset vertical seismic...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0448
.... Figure 4 shows the primary and multiple rms velocities as predicted by the previous analysis. The figure confirms that there is little moveout discrimination between primaries and multiples at all levels. At some levels, the multiples are significantly faster than the primaries. As well as making...
Proceedings Papers

Paper presented at the 1995 SEG Annual Meeting, October 8–13, 1995
Paper Number: SEG-1995-1464
... the interval velocity of the primaries by doubling the water layer thickness, or directly from the RMS velocities of the primaries (Lumley et al., 1994). Qualitatively, after this NMO correction, spatially averaged crosscorrelations between primaries in the data and modeled multiples tend to cancel out, while...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-W04-03
... the subsurface do not show such a strong discrimination from the input data. Additionally, in the domain we are applying this workflow there can very little structural discrimination between primaries and multiples. Due the polarity differences the primary signal amplitude can experience local reduction...
Proceedings Papers

Paper presented at the 1993 SEG Annual Meeting, September 26–30, 1993
Paper Number: SEG-1993-1090
... multiples. This is due to the decreasing velocity separation between multiples and primaries as the multiple period shortens. Although multiples usually have different apparent velocities from the primary reflections, their moveout is often non-hyperbolic. The amplitude and frequency content of such events...

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