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Technical Content

Technical Abstract
SEG - Society of Exploration Geophysicists | Sergey Birdus, Alexey Artemov, Li Li, Llew Vincent © 2015 SEG | October

We present how to create realistic geology conformal anisotropic velocity models and reduce depth misties in standard tomographic and high-resolution FWI depth velocity modelling. We assume that localized variations in both velocity and anisotropy are caused by changes in the lithology and we use ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Vetle Vinje, Peng Zhao, Jim Gaiser © 2015 SEG | October

A conventional CMP based COV binning will create footprint and migration noise for acquisitions where sources and receivers are at different depth levels and/or PS waves are imaged. The OVT muting & weighting technique is a way to overcome this problem. The OVT muting ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Cecile Berron, Laurene Michou, Benoit De Cacqueray, Florian Duret, Julien Cotton, Eric Forgues © 2015 SEG | October

The seismic monitoring solution presented here is a permanently buried, fully automatic, and continuous seismic acquisition and processing system. It ensures remarkably repeatable daily seismic. Our specific calendar oriented 4D processing flow is described and applied on a monitoring system installed for Shell on ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Zhigang Zhang, Ping Wang © 2015 SEG | October

In marine seismic surveys, seismic interference (SI) remains a considerable problem when marine seismic data sets are acquired in close vicinity of each other. We present a method for attenuating SI noise using a sparse Tau-P transform. Using a synthetic example, we demonstrate that ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Yi Xie, James Sun, Yu Zhang, Joe Zhou © 2015 SEG | October

The anelastic effects of the overburden cause seismic amplitude attenuation, wavelet phase distortion and seismic resolution reduction. It is desirable to correct the frequency dependent energy attenuation and phase distortion in a prestack depth migration. The situation becomes more challenging in complex geological regions ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Patrice Guillaume, Stanislaw Warzocha, Olivier Hermant, Anthony Prescott © 2015 SEG | October

We present a method for estimating the shape of salt bodies by using ray-based nonlinear slope tomography. The data to invert mainly consist of residual moveout (RMO) observed below salt shapes on migrated common image point gathers. We compute Fréchet derivatives made of traveltime ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Ping Wang, Jingbo Liu, Jeshurun Hembd, Suryadeep Ray © 2015 SEG | October

While most marine baseline surveys do not use broadband techniques, increasingly more monitor surveys are being adapted to broadband techniques that often use different receiver-depth profiles (e.g., deeper or variable-depth). A regular matching filter that has been commonly used in 4D time-lapse processing may ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Bin Zhou, Joe Zhou, Lubo Liu, Fong Cheen Loh, Junjie Liu, Yi Xie, Zhiliang Wang, Xiaodong Pu © 2015 SEG | October

In the oil rich Bohai area, Ocean Bottom Cable (OBC) acquisition has become the new trend with the benefit of operational flexibility, better illumination, better multiple elimination and better S/N for the targets at middle to deep depth. However, the presence of azimuthal anisotropy ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Yonghe Guo, Shiping Wu, Masamichi Fujimoto, Yuki Sasaki © 2015 SEG | October

Thrust complex imaging in the Timor Trough suffers from the fault shadows due to strong lateral velocity variation. We demonstrate a new workflow to tackle this. Broadband seismic data were acquired with high signal-to-noise ratio of low frequency. With broadband input, full waveform inversion ...

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