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Coherency attribute stacks

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Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-0824
... and far stack amplitude data applied to a fluvial-deltaic environment in the South Marsh Island area of the Gulf of Mexico, U.S.A. Geometric Attributes The most commonly used geometric attribute in the oil and gas industry currently is coherence. A good overview of geometric attributes used...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1287
... to compute geometric attributes in time or depth pre-stack migrated offset or angle gathers using Gradient Structure Tensor. This alternative reduces noise and therefore opens new perspectives for the processing sequence, the seismic enhancement (structure-oriented filtering; dip-steering for coherence...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-3614
... (ZO) image based on a 3D synthetic data in a more efficient way. Differed from traditional 3D CRS stack, a pragmatic approach to search local 3D reflection segment is taken such that only three attributes instead of eight will be enough to characterize the local coherency of reflection events in 3D...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0490
... planes have zero curvature. All these geometric attributes are sensitive to the coherent noise that leaks into the stack array. Figure 3 Arrows are vectors normal to the surfaces. Diverging vectors over anticlines represent positive curvature while converging vectors over synclines have negative...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-3539
... the PP and SS seismic attributes on full stack gathers, the variance-based coherence attribute has defined quite well the edges of the reef. For our Diamond M survey, the PP volume better defines the inner reef incoherent events while the SS volume better defines the edges of the reef in general...
Proceedings Papers

Paper presented at the 18th World Petroleum Congress, September 25–29, 2005
Paper Number: WPC-18-0871
... modeling. The well established Continuous Fracture Modeling (CFM) workflow is readily available in commercial software that takes seismic attributes derived from pre-stack or post-stack processes and use them in various ways to create the most coherent fracture models that are able to match individual well...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-1108
... data volumes from the coherency attribute and diffraction results. Firstly we compare the diffractivity analysis volume produced from both the NMO stacked time volume, with that produced from the finite difference- modeling, based on the earlier defined coherency anomalies volume. We essentially test...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584026
... slope system in the Magallanes Basin, Chile. We analyze the effect of different seismic attributes: coherence, dip magnitude, dip azimuth, root mean square amplitude, and Laplacian filters on our different bandwidth data to understand how much “mixing” of stratigraphic features there is by comparing...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5909822
... Summary Fault interpretation remains one of the most time consuming steps in seismic interpretation. Typically, methods that attempt to make this process more efficient concentrate on creating new seismic attributes or enhancements to traditional coherence volumes that are then followed...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-3006
... to their correct values. The method is related to multiple coherence analyses with different search apertures. The resulting stack and attribute sections form new pseudo pre-stack data volumes which are used for the estimation of the extrapolation operators. For a synthetic data example we show...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2019
Paper Number: IPTC-19228-MS
... stratigraphic features, which can result in pitfalls in seismic interpretation, seismic attribute analysis as well as seismic inversion. While the pre-stack seismic data is usually unavailable, which means that the noise can hardly be subtracted by conventional pre-stack seismic processing workflows...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0569
... analysis plays an important role in the interpretation of seismic data. In this paper we will demonstrate how our modified Non-Local-Means random noise attenuator is capable of enhancing the coherency attribute. We do this by comparing this attribute obtained from a 3D stack volume filtered with the Non...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17675414
... migrating them into one bin. If velocity anisotropy is not taken into account by the migration algorithm, subtle discontinuities and some major faults may exhibit lateral shifts, resulting in a smeared image after stacking. Based on these two issues, we introduce a new way to compute coherence...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1894
..., these parameters are determined by means of coherence analysis. This results in a 3D volume for each of these parameters. Assuming the near-surface velocity to be known, these eight stacking parameters can be related to the so-called kinematic wavefield attributes. These are the azimuthal direction and emergence...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5919501
...-normal distribution, coherence measures of post-stack seismic data are biased towards, and abruptly terminated, at 1.0, such that the significance of a given coherence measure is much more difficult to grasp. The application of attributes to depth-migrated data justifies the use of data-adaptive...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-1304
... suppression and data interpolation. Introduction In conventional 3D ZO-CRS stack, the stacking operator is described by eight kinematic wavefield attributes which have to be found by a multi-step coherence analysis (Cristini et al, 2002; Mueller, 2003; Borrini et al, 2005; Gierse et al., 2010). The search...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3593408
... decomposition methods rely on multi-trace coherency attributes to improve spectral decomposition results. We propose a new coherency-based spectral decomposition method, the Auxiliary S-transform, which significantly improves on the resolution of the S-transform. The Auxiliary S-transform maps a seismic section...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2993019
... by reflections. Local coherence analysis schemes such as the common-reflection-surface (CRS) stack (Ja¨ger et al., 2001) help to significantly improve the signal-to-noise ratio of the data. As a by-product, the CRS stack yields a set of phys- ically meaningful wavefront attributes, which can be used for a large...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216024
... limited volumes provide poor references. Additionally, a poststack seismic amplitude or attribute may smear subtle details and strengthen lateral shifts during the azimuthally stacking process. Recently, Qi et al. (2017) proposed a multiazimuth coherence based on a sum of covariance matrices from...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13972705
... as usually done in slant-stack analysis and also provides useful attributes energy attribute detecting time intervals with arriving coher- ent wave, slowness vector corresponding to this wave and the value of the apparent velocity. The presented method shows stable results in presence of random...

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