Technical Library

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

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South Halfway 3D. An example of a challenging onshore acquisition and subsequent processing and a unique way of performing a pre-stack elastic inversion on a difficult dataset

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October 18, 2022
Author: Marianne Rauch*, TGS, Doug Brost, TGS, Hassan Odhwani, TGS, Aravind Nangarla, TGS, Adriana Gordon, Qeye Labs
The 3D survey, South Halfway was acquired in December 2019 in Wonowan, BC, Canada. The size of the survey is 94 km2 and covers a bog and river valley.

Deconvolution of upgoing and downgoing wavefields: A data example from the NOAKA OBNexperiment

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October 18, 2022
Author: Tim Seher*, Hassan Masoomzadeh, Yong Ren, Simon Baldock and Bin Wang (TGS)
Ocean bottom node surveys are popular tools for both seismic exploration and monitoring due to the possibility for superior imaging and velocity model.

Vz denoise and P/Z matching in 3D curvelet domain

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October 18, 2022
Author: Yong Ren*, Chenhao Yang, Tim Seher, Matt Hawke and Eddie Cho (TGS)
Ocean bottom node (OBN) seismic data processing commonly uses the combination of hydrophone (P) and vertical geophone (Z) components to separate upgoing.

Monument Butte 3D – Reprocessing case study in Uinta Basin

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October 18, 2022
Author: Mitch Preston, Xinxiang Li, TGS; Seth Berman*, Phillip Keith, Ovintiv; Christopher Egger, Josef Heim, Nebojsa Pralica, David Brookes, James Beck, TGS
A 3D land seismic survey was processed using amplitude and azimuth-friendly workflow. The sequence includes multiple iterations of surface consistent.

DAS noise attenuation using wavelet stack

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October 18, 2022
Author: Zhou Yu*, Zhaojun Liu, Ge Zhan, Peng Cheng, Bin Wang, TGS, Houston, USA. Weihong Fei, Chevron
Dense spatial sampling (~1m) and low signal-to-noise ratio (SNR) are typical features of distributed acoustic sensing (DAS) data. We have developed a.

High resolution sequence stratigraphy of the Mexican Gulf of Mexico based on interpretation of well and seismic data

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October 18, 2022
Author: Cian O’Reilly*, Elisabeth Royce-Rogers (TGS)
Prolific source rocks, an abundance of trap types and stacked reservoirs and seals combine to make the Gulf of Mexico (GOM) a hydrocarbon super-basin. The.

Noise analysis and ML denoising of DAS VSP data acquired from ESP lifted wells

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October 18, 2022
Author: Ge Zhan*, Yao Zhao, Cheng Cheng, and Josef Heim, TGS; Weihong Fei, Mike Craven, Scott Baker, and Gilles Hennenfent, Chevron
3D DAS VSP data were acquired in two active wells equipped with Electrical Submersible Pumps (ESPs) from the Big Foot field in the deep water, Gulf of.

Sub-L1 Norm Regularized Inversion Deblending in Local 3D FK Domain for Ocean BottomNode Data

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October 18, 2022
Author: Jun Sun*, Zhaojun Liu, Manhong Guo, Graeme Stock, Bin Wang (TGS)
Inversion deblending in a sparse transformed domain is an important approach to obtain high quality deblended data for simultaneous source acquisition..

Full-waveform inversion and FWI imaging for land data

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October 18, 2022
Author: James Sheng, Cristina Reta-Tang*, Faqi Liu, TGS; Alfredo Vázquez Cantú, Alejandro Cabrales Vargas, Pemex
Velocity model building and imaging for land surveys are particularly challenging due to the complexities of the near surface model and strong noise. In.