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Thin beds, tuning, and AVO

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Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17775209
... ABSTRACT Forward modeling and AVO analysis on wedge models are integrated in this paper to analyze the influence of thickness of a single thin bed on AVO responses. Study shows that tuning effect similar with post-stack amplitude can also be observed on pre-stack AVO intercept (P) and gradient...
Proceedings Papers

Paper presented at the 1988 SEG Annual Meeting, October 30–November 3, 1988
Paper Number: SEG-1988-1213
... stratigraphy avo stratigraphy method vaughn bail impedance poisson Thin Bed Tuning Analysis Using AVO Stratigraphy Methods Vaughn Bail, Berrong Enterprises Ltd. SUNMARY When conventional methods of seismic stratigraphy are applied to the thin bed problem, the final result is a function which relates...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13823241
... : Geophysics , 74 , no. 4 , P35 – P43 , 10.1190/1.3119264 . Hamlyn , W. , 2014 , Thin beds, tuning, and AVO : The Leading Edge , 33 , 1394 – 1396 , 10.1190/tle33121394.1 . Lilly , J. M. , and S. C. Olhede , 2012 , Generalized Morse wavelets...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-0316
... Fig 2 Vertical component of simulated seismic data Seismic AVO responses analysis on thin inter-layer reservoir To analyze the effect of thin bed tune on AVO responses, compare the seismic data simulated on spherical wave equations with point source with that on Zoeppritz equations, a series of thin...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-0396
... affected by many other factors. Seismic data processing should aim at removing the effects of these other factors, so that the corredted data set only depends on refection and trans- mission coefficients. For the thin-bed layer reservoir, AVO analysis has two main factors. First, the tuning effects affect...
Proceedings Papers

Paper presented at the 1991 SEG Annual Meeting, November 10–14, 1991
Paper Number: SEG-1991-0669
.... Memoir 9, 401-411. Jain, S., 1987, Amplitude-vs-offset analy- sis: a review with reference to applica- tion in western Canada: Jour. Can. Sot. Explor. Geophy., 23, 27-36. Lawton, D.C., 1989, Effects of thin bed tuning on AVO analysis: Abstract, Annual meeting of the CSEG, Calgary, 1989. Dstrander, W.J...
Proceedings Papers

Paper presented at the 1990 SEG Annual Meeting, September 23–27, 1990
Paper Number: SEG-1990-1463
... a number of scenarios under which AVO will be both effective and ineffective, due to thin bed tuning effects, in finding hydrocarbons. In the discussion and model displays, we consider the A*B stack (commonly used as an indicator of hydrocarbons) and how A*B varies as a function of bed thickness...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0234
... Summary Wavelet stretching due to NMO correction of seismic gathers causes problems in AVO. Coupled with the degrading action of wavelet stretching is offset dependent tuning for thin beds. Even though tuning is inherent in the data before NMO correction, its effect on AVO is more obvious...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0587
.... The black- dash lines are the AVO curves when thin-bed thickness is tuning thickness . The red-dash lines are calculated based on Zoeppritz equations. Figure 4: AVO analysis when substituting water-sand in thin-bed with gas-sand for n=4 (a) and n=8 (b). The dashed lines are AVO curves in acoustic regime...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-0236
... data. The estimation of these AVOs are inevitably affected by wave propagation effects and inversion algorithm limitations, such as thin-bed tuning and migration stretch. What is the minimum V p =V s change required for an AVO to survive the background tuning and stretching effects? This question...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-0346
..., A quantitative study of the effects of tuning on AVO effects for thin beds: Canadian Journal of Exploration Geophysics, 35, 36 42. Hilterman, F.J., 2001, Seismic amplitude interpretation: SEG. Lin, L., and R. Phair, 1993, AVO tuning: 63rd Annual International Meeting, SEG, Expanded Abstracts, SEG, 727 730. Rojas...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0199
... by combining two different techniques. We are proposing such a combination In this study, the frequency and offset-dependent amplitude is analyzed with respect to the pore-fluid content and tuning effects. We have used spectral decomposition to integrate the thin-bed frequency-dependent analysis with AVO...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1465
... ABSTRACT AVO seismic signatures present in seismic data could be affected by several factors; one of those is the tuning or thin-bed effect. We propose a methodology to infer from seismic amplitudes and fluid properties, the presence of thin bed effect. This methodology includes: forward...
Proceedings Papers

Paper presented at the 1988 SEG Annual Meeting, October 30–November 3, 1988
Paper Number: SEG-1988-1195
... residual ve- locity errors. However, even when the velocity is perfectly determined, serious AVO distortions remain due to nor- mal moveout stretch, thin-bed tuning, differential tuning as a function of offset, and event time misestimation. This presentation will show that all of these effects are closely...
Proceedings Papers

Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-0175
... ABSTRACT No preview is available for this paper. AVO 2.5 Removal of offset-dependent tuning in AVO analysis Herbert W. Swan, ARCO Exploration and Production Technology* Summary Offset-dependent tuning of thin beds can be a serious complica- tion in the analysis of amplitude variations...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17667463
..., the tuning of thin layers can also cause frequency-dependent responses (Marmalyevskyy and Roganov 2006, and Li et al. 2009).Liu and Schmitt (2003) investigated the AVO re- sponse from a single thin bed and analyzed the influence of Poisson s ratio and thickness of the thin bed. These studies showed...
Proceedings Papers

Paper presented at the 20th World Petroleum Congress, December 4–8, 2011
Paper Number: WPC-20-0222
... the impact of thin interbed tuning effect on AVO. Castagna et al. (2002, 2003 and 2005) used spectral decomposition to detect low-frequency shadows associated with hydrocarbon. However, not all of thin interbed reservoirs are the reservoirs associated with hydrocarbon. It is well known that those reservoirs...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2985013
.... By considering dis- persion and attenuation in the Chapman and Carcione mod- els, the modelling results indicate that tuning effects of the thin inter-bedded media, and the inelastic properties, have a comprehensive impact on the reflection coefficients, re- flected wave spectra and AVO responses of the PP...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-0240
... serious fac- tors hampering con dent AVO analysis away from ar- eas with well control and, although the potential compli- cation induced by di erential interference was acknowl- edged since the early times of AVO analysis (Ostrander, 1984), compensation of AVO for thin bed tuning still re- mains...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0274
...- and S-wave velocities in both VSP and surface seismic surveys. In a low-frequency range the AVO response of a single thin bed differs from that of a TLS. Within a frequency range close to the resonant frequency (tuning thickness) for a given TLS, favorable conditions occur for predicting multi-layer...

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