Technical Library

Seismic Data, Processing, Technology, Well Data Reports and Industry and Trade Publication Features, from the Experts at TGS

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Long offset ocean bottom node FWI and multi-azimuth tomography for high-resolution VMB

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November 24, 2020
Author: Adriana Citlali Ramirez, Simon Baldock, Dhiman Mondal, Jan Gromotka, Mattew Hart
Filed Under: SEG
Efficient acquisition of large-scale, azimuth-rich ocean bottom node (OBN) data, with long offsets and high fold is now a reality. Such data provide an.

Imaging the complex geology of the Faroe Shetland Basin, West of Shetlands

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November 24, 2020
Author: Matthew Hart, Guy Hilburn, Sandeep Bhamber, Jason Twigg, Rachel Ward, Steve Drewell, Simon Baldock
Filed Under: SEG
The Faroe Shetland Basin area located to the West of the Shetland Islands is typified by complex structural features with highly variable velocities,.

Deblending of OBN ultralong-offset simultaneous source acquisition

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November 24, 2020
Author: Yi Xuan, Raheel Malik, ZhigangZhang, Manhong Guo, Yi Huang
Filed Under: SEG
Ocean Bottom Node (OBN) data can be acquired using blended acquisition or simultaneous shooting that allows temporal overlap among different sources. A.

Vz Noise Attenuation Using Dual-Tree Complex Wavelet Transform

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November 11, 2020
Author: Yong Ren, Chenhao Yang, Tomislav Degel, Zhaojun Liu
Filed Under: SEG
In ocean bottom seismic data, vertical components are frequently contaminated by converted shear waves due to the scattering in the shallow seabed. Proper.

Ultralong Offset OBN- Path to better subsalt image

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November 11, 2020
Author: Hao Xing, Yang He, Yi Huang, Jianshun Sheng
Filed Under: SEG
Ocean Bottom Node (OBN) acquisition provides ultralong offset and full-azimuth (FAZ) illumination for better model building and imaging. A blended-source,.

Structure enhanced Least-squares migration by deep learning based structural preconditioning

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November 11, 2020
Author: Cheng Cheng, Yang He, Jian Mao, Bin Wang
Filed Under: SEG
Iterative data-domain least-squares migration can overcome acquisition limitations and recover the reflectivity for desired amplitudes and resolutions..

Structure constrained least-squares migration of total reflection and its applications

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November 11, 2020
Author: Cheng Cheng, Yang He, Jian Mao, Bin Wang
Filed Under: SEG
Least-squares imaging of primary reflection can overcome acquisition limitations and recover the reflectivity for desired amplitudes and resolutions (Wang.

Shear wave noise attenuation and wavefield separation in curvelet domain

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November 11, 2020
Author: Chenhao Yang, Yi Huang, Zhaojun Liu, Jianming Sheng, Eric Camarda
Filed Under: SEG
One of the advantages of ocean bottom seismic data is combining hydrophone and vertical geophone data for ghost reflection attenuation. However, when the.

Noise strikes, but signal wins in Full Waveform Inversion

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November 11, 2020
Author: Yi Huang, Jian Mao, Hao Xing and Chris Chiang
Filed Under: SEG
Due to inherent benefits such as ultra-long offset, full azimuth (FAZ) illumination and low-frequency availability, a large multi-client sparse-node.

Multi-Channel dynamic matching full-waveform inversion

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November 10, 2020
Author: Jian Mao, James Sheng, Yi Huang, Feng Hao, and Faqi Liu
Filed Under: SEG
We propose a multi-channel dynamic matching full-waveform inversion (DMFWI) for a high-resolution velocity-model update, which focuses on solving.

Analysis and application of data-driven approaches for internal-multiple elimination

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November 10, 2020
Author: Chao Ma, Manhong Guo, Zhaojun Liu and James Sheng
Filed Under: SEG
Imaging artifacts caused by strong internal multiples can interfere with primary images, affecting structural interpretation and amplitude analysis. In.

An effective Q-compensation method for Fourier finite-difference wave-equation migration in tilted transversely isotropic media

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November 10, 2020
Author: Chen Tang, Jianming Sheng, Jian Mao, Yang He and Bin Wang
Filed Under: SEG
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.