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Li, A.L. (author), Verschuur, D.J. (author), Liu, Xuewei (author), Abolhassani, S. (author)
Since seismic imaging creates an image of the subsurface structure based on information received from the measured wavefield, it is essential to fully utilize the reflected waves. Full Wavefield Modeling (FWMod) was developed with recursive and iterative up-and-down wavefield propagation, using one-way wave propagation, to model both primary...
journal article 2024
document
Hoogerbrugge, L.A. (author), van Dongen, K.W.A. (author), Verschuur, D.J. (author)
The phenomenon of wave conversions, where acoustic, pressure (P) waves are converted to elastic, shear (S) waves is commonly disregarded in seismic imaging, which can lead to lower-quality images in regions with strong reflectors. While a number of methods exist which do take wave conversions into account, most deal with P- and S-waves...
conference paper 2024
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Karimzadanzabi, A. (author), Cuesta Cano, A. (author), Verschuur, D.J. (author)
This extended abstract discusses a novel approach to identify geological sub-seismic scale features using angle-gather spectrograms. Traditional seismic methods face challenges in identifying fine scale geological structures, especially in sublayers thinner than about 1/10 of the wavelength. This paper introduces the use of spectrogram analysis...
conference paper 2024
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Safari, M. (author), Verschuur, D.J. (author)
Seismic waves traveling through the subsurface experience several forms of attenuation, including geometric spreading, reflection, transmission, and earth attenuation (via the so-called quality factor Q). To achieve high-resolution sub-surface details, it is essential to tackle all types of attenuation resulting from the overburden. Attenuation...
conference paper 2024
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Zhang, D. (author), Zhang, L. (author), Verschuur, D.J. (author)
Ground penetrating radar (GPR) is a commonly used technology for identifying and examining ice. The low electrical conductivity and the uniformity of ice covers provide GPR with exceptional signal penetration and, thus, the ability to reveal the internal layers of glaciers. To extract the necessary information, wavefield separation and imaging...
conference paper 2024
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Zhang, D. (author), Verschuur, D.J. (author)
The data-driven surface-related multiple elimination (SRME)-type approach requires fully sampled sources and receivers during the multidimensional convolution process. Otherwise, the estimated multiples will be aliased. Compared to expensive reconstruction processes before prediction, dealiasing on the estimated multiples from limited sources...
conference paper 2024
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Alfaraj, Ali (author), Verschuur, D.J. (author)
Acquiring economical land data with compressive sensing requires data reconstruction. In the presence of complex near-surface weathering layers, which on their own typically pose a challenge to processing densely sampled data, data reconstruction suffers. The conventional approach of near-surface correction followed by interpolation rely on...
conference paper 2024
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Shirmohammadi, F. (author), Draganov, D.S. (author), van IJsseldijk, J.E. (author), Ghose, R. (author), Thorbecke, J.W. (author), Verschuur, D.J. (author), Wapenaar, C.P.A. (author)
The Marchenko method is capable of estimating Green’s functions between the surface of the Earth and arbitrary locations in the subsurface. These Green’s functions are used to redatum wavefields to a deeper level in the subsurface. The Marchenko method enables the isolation of the response of a specific layer or package of layers, free from the...
conference paper 2024
document
Abolhassani, S. (author), Verschuur, D.J. (author)
Enhanced pre-stack depth migration, characterized by improved resolution and amplitudes, ensures a more accurate representation of the subsurface, proving essential for reducing the likelihood of geological misinterpretations and facilitating informed decision-making in seismic exploration. However, obtaining high-resolution images with...
conference paper 2024
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Shoja, Aydin (author), Verschuur, D.J. (author)
The accuracy of a model obtained by full-waveform inversion can be estimated by analysing the sensitivity of the data to perturbations of the model parameters in selected subsurface points. Each perturbation requires the computation of the seismic response in the form of Born scattering data for a typically very large number of shots, making the...
conference paper 2024
document
Li, A.L. (author), Verschuur, D.J. (author), Abolhassani, S. (author)
Seismic imaging is crucial for subsurface exploration and monitoring, with a focus on deep and complex structures. Seismic wave migration solves the wave equation, and an accurate propagator is essential. Full Wavefield Modeling (FWMod) was developed based on recursive and iterative up/down wavefield propagation, modeling both primaries and...
conference paper 2023
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Zhang, D. (author), Verschuur, D.J. (author)
Seismic data interpolation is a topic well suited for deep learning (DL) applications. Scaling operation-based DL neural networks, e.g., U-Net, have been popular since its booming development in the field of seismic data processing. Although many successful studies using U-Net on seismic data, scientists start to realize the downside of its...
conference paper 2023
document
Karimzadanzabi, A. (author), Cuesta Cano, A. (author), Verschuur, D.J. (author)
In the process of seismic subsurface imaging, there is no acceptable forward model reflecting the AVO response in a laterally inhomogeneous medium for reservoir characterization. This means that even when inversion is performed in full waveform, local heterogeneity is typically not fully incorporated while emplying a local 1.5D assumption. Thus,...
conference paper 2023
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Chapeland, C.G.M. (author), Verschuur, D.J. (author), Draganov, D.S. (author)
Poor knowledge of source and receiver positions in ultra-high-resolution marine seismic data is the cause of severe damage which requires novel processing techniques to mitigate. This type of seismic data is highly relevant for ultra-shallow subsurface imaging in geo-engineering projects both offshore and in harbours. Current positioning...
conference paper 2023
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van der Neut, J.R. (author), Hoogerbrugge, L.A. (author), van Dongen, K.W.A. (author), Verschuur, D.J. (author)
Full Wavefield Migration (FWMig) is an inversion-based seismic imaging modality that incorporates multiple reflections via one-way wave propagation. The flexible Full Wavefield Modelling (FWMod) engine that undergirds FWMig can be extended to address both compressional and converted waves. To take care of the angle-dependent nature of reflection...
conference paper 2023
document
Alfaraj, Ali (author), Verschuur, D.J. (author)
To avoid multiple iterations of normal moveout (NMO) velocity estimation followed by short-wavelength statics estimation usually performed on land data, and to also improve the accuracy and computational efficiency of the latter, a low-rank-based residuals statics (LR-ReS) estimation and correction framework has been recently proposed. The...
conference paper 2023
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Abolhassani, S. (author), Verschuur, D.J. (author)
Reflection waveform inversion (RWI) is a method that relies on primary pure reflection data to recover the subsurface background velocity based on the associated evolving seismic images. Background velocity updates estimated by conventional RWI are nonoptimal, which is partly attributed to low-resolution tomographic wavepaths and migration...
conference paper 2023
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Kontakis, A. (author), Verschuur, D.J. (author)
In contrast to conventional acquisition practices, simultaneous source acquisition allows for overlapping wavefields to be recorded. Relaxing the shot schedule in this manner has certain advantages, such as allowing for faster acquisition and/or denser shot sampling. This flexibility usually comes at the cost of an extra step in the...
journal article 2023
document
Alfaraj, Ali (author), Verschuur, D.J. (author), Herrmann, Felix J. (author)
Surface consistency forms the basis for short-wavelength statics estimation. When raypaths in the near surface diverge from a normal incidence or when the normal moveout (NMO) velocity is inaccurate, surface-consistent methods may fail to estimate accurate statics. Existing nonsurface-consistent techniques can be prone to errors due to the...
journal article 2023
document
Anikiev, Denis (author), Birnie, Claire (author), Waheed, Umair bin (author), Alkhalifah, Tariq (author), Gu, Chen (author), Verschuur, D.J. (author), Eisner, Leo (author)
The confluence of our ability to handle big data, significant increases in instrumentation density and quality, and rapid advances in machine learning (ML) algorithms have placed Earth Sciences at the threshold of dramatic progress. ML techniques have been attracting increased attention within the seismic community, and, in particular, in...
review 2023
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