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Keywords: attenuation
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426904
... attenuation of internal multiples is a crucial step in mitigating the problems associated with earth model building and imaging processes over complex, highly stratified basins and pre-salt targets. We propose an internal multiple attenuation workflow based on the 2D inverse scattering series (ISS) prediction...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426955
... Location: 362A Presentation Type: Oral reservoir characterization different source configuration test 1 exposure level attenuation seg international exposition continuous wavefield method source configuration upstream oil & gas exploration geophysicist 10 wavefield method test 2 test...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426983
... Yilmaz, 2018). To mitigate the deficiencies due to this restriction, the synthetic data generated from the optimal model is adaptively subtracted from the shot gathers. However, since the quality factors can significantly attenuate amplitudes and cause phase shifts in seismic data, both practical...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3417830
... We review the up-down (U/D) deconvolution and the more general multidimensional deconvolution (MDD) methods for source designature and attenuation of free-surface multiples recorded in ocean-bottom node seismic surveys. In spite of the theoretical limitation of stratified Earth, U/D...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3399580
... We investigate whether atypical wave phenomena (multiples, guided waves, large attenuation) can be used to map the shallow structure and the state of permafrost. We analyze the data from a seismic survey acquired in the Beaufort Sea over degrading permafrost. Using viscoelastic fullwave modeling...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3405908
... Surface waves, such as ground roll, are a major source of coherent noise in land seismic data, and its attenuation is still a challenge during processing. Even with the most simplifying assumption of a homogenous half-space, one can show that ground roll displacements in x and z components of a...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3411534
... Strong surface and guided waves in land seismic data often distort signals from deeper structures, leading to poor S/N. Accurate modeling and attenuation of aliased surface waves has been a long-standing challenge in onshore seismic processing and imaging. To address this issue, we propose a...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3412339
... Understanding the effects of pressures, fluid content, and fluid distributions on the elastic wave propagation in reservoir rocks is of great importance in guiding oil and gas exploration. A new theoretical model for the attenuation of partially saturated porous rock was developed by combining...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3413016
... formalism, extended Gassmann equation, is developed to characterize the dispersion and attenuation of porous media containing multi-type and multi-scale heterogeneities. Using the extended Gassmann equation, the effect of complex microscopic or mesoscopic heterogeneities with discrete or continuous...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3420118
... upstream oil & gas accuracy receiver conductivity frequency skin effect dielectric effect resistivity transform log analysis propagation tool apparent conductivity exploration geophysicist 10 tool constant well logging attenuation propagation measurement seg international...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3421261
... P waves traveling in thermoelastic materials suffer attenuation and dispersion due to the existence of the thermal (T) wave, which is diffusive at low frequencies and is a propagation wave at high frequencies. Thus, this wave behaves similarly to the slow P wave in Biot (poroelastic) media. We...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427329
... often occur in the areas of intricate sedimentary conditions, which may lead to obvious absorption and attenuation phenomena. According to the real challenges of Neogene in Bohai Bay, a series of research on the relationship between spectrum and AVO response are implemented on both the synthetic and...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427492
... signal correntropy noise suppression reservoir characterization attenuation sparsity-promoting method exploration geophysicist 10 loss function Swell noise suppression via correntropy based robust sparsity-promoting method Weiwei Xu*, Yanhui Zhou, Xiaokai Wang, Wenchao Chen, Xi an Jiaotong...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425401
... Seismic wave induced fluid flow between mesoscale fractures and background pores is an important reason for seismic wave dispersion and attenuation in fracture reservoirs. Velocity dispersion and attenuation will have an important impact on the AVO (amplitude versus offset variations...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425692
... Ground roll attenuation of land seismic data is still an outstanding and challenging problem. Deep learning is a powerful tool for separating signal from noise. Recently, supervised deeplearning-based methods have been applied to ground roll attenuation. However, they require a large set of...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425792
... neural network constraint low frequency component reservoir characterization upstream oil & gas artificial intelligence frequency component shot gather stack convolution ground roll attenuation seismic data seg international exposition architecture machine learning deep...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428191
... We experimentally measured elastic and inelastic parameters of two sandstones at dry and water saturated conditions with frequencies range from 2 Hz to 500 Hz. Data indicates that attenuation and velocity dispersion are strongly dependent on rock permeability and pore fluids, particularly...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428241
... When a seismic wave propagates in the subsurface of the earth, its energy can be attenuated. This has a negative influence on both the amplitude and the phase of an image, especially when a geological body with large attenuation coefficients presents in the target survey area. Therefore, we need...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428300
... Deep-water seismic exploration is plagued with numerous imaging problems. One such problem is data contamination by internal multiples; its prediction and attenuation have been challenging. These multiples can be so strong that they can pose a significant impediment to our understanding of the...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428310
... attenuation data domain operation upstream oil & gas internal multiple attenuation verschuur schlumberger summary reservoir characterization marina fagunde pantoja prediction seg international exposition attenuation strategy internal multiple exploration geophysicist 10 santos...

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