Technical Library

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

Replacing conventional brittleness indices determination with new attributes employing true hydrofracturing

February 20, 2020
Ritesh Kumar Sharma, Satinder Chopra, Larry R. Lines
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Application of Image-domain LSRTM for Illumination Study and Optimal Survey Design

September 19, 2019
Zhuoquan Yuan, Yang He, Jean Ji, Vijay Singh, and Senren Liu
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A case study: Enhanced 3D interpolation combined with 3D structural modeling from 2D seismic data

September 16, 2019
Taejong Kim, Tefera Eshete, Xuening Ma, Kenny Lambert, Ken Pavloske
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FWI Salt Model Update Trials with Sparse Nodes

September 16, 2019
Yi Huang, Jian Mao, Chong Zeng, James Sheng
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Ground roll removal using adaptive reflection mask function in Curvelet domain

September 15, 2019
Chenhao Yang, Zhaojun Liu, Jianming Sheng, Bin Wang
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Fourier finite-difference wave-equation migration in tilted transversely isotropic media with an improved solution for coefficient estimation

September 15, 2019
Chen Tang, Yang He, Jian Mao, Jianming Sheng
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Impact of adequate QC steps on seismic reservoir characterization

September 15, 2019
Ritesh Kumar Sharma, Satinder Chopra, Larry R. Lines
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Challenges and uncertainty in the seismic reservoir characterization of Bone Spring and Wolfcamp formations in the Delaware Basin using rock physics

September 15, 2019
Ritesh Kumar Sharma, Satinder Chopra, James Keay, Larry Lines
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A robust workflow for performing joint impedance inversion with applications from North American Basins

September 15, 2019
Ritesh Kumar Sharma, Satinder Chopra, Larry R. Lines
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SaltSeg: A β-variational autoencoder constrained encoder-decoder architecture for accurate geologic interpretation

September 15, 2019
Satyakee Sen, Sribharath Kainkaryam, Cen Ong, Arvind Sharma
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Interpolation of regularly sampled prestack seismic data with self-supervised learning

September 15, 2019
Satyakee Sen, Sribharath Kainkaryam, Cen Ong, Arvind Sharma
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A practical data-driven method for applying amplitude inverse Q that preserves amplitude variations with offset

September 15, 2019
N. Ratnett, S. Baldock, H. Masoomzadeh
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Shallow land PSDM velocity model building for unconventional plays

September 15, 2019
Perz, Mike Bruins, Candace Heim, Josef
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Deblending of simultaneous and flip-flop shooting of sparse node long offset seismic for refraction FWI

September 15, 2019
Pal, Himadri Masoomzadeh, Hassan Roende, Henrik Liu, Zhaojun Bate, Duncan Mason, Chuck
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Seismic data denoising with mathematical morphological filters

September 15, 2019
Liu, Z. Wheaton, D. Wang, B.
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Benefits of tilted orthorhombic imaging on a FAZ dataset in the central Gulf of Mexico

September 15, 2019
Li Li, Dhananjay Tiwari, Xinyi Sun, Zhiqiang Guo
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Towards smaller source volumes –an example from the Gulf of Mexico

September 15, 2019
Langhammer, Jan Bate, Duncan Roende, Henrik Ha, Roy
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Phase only reflection full-waveform inversion for high resolution model update

September 15, 2019
Jian Mao, James Sheng, Guy Hilburn
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Unsupervised machine learning facies classification in the Delaware Basin and its comparison with supervised Bayesian facies classification

September 15, 2019
Chopra, Satinder Marfurt, Kurt J. Sharma, Ritesh Kumar
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Efforts at effective seismic reservoir characterization of Bone Spring and wolfcamp formations in the Delaware Basin

September 15, 2019
Chopra, Satinder Sharma, Ritesh Kumar Keay, James
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A practical least-squares Kirchhoff Q migration workflow and its application to Celtic Sea imaging

September 15, 2019
Cheng Cheng*, Yang He, Zhaojun Liu, Bin Wang
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Deblending of long-offset OBN data for velocity model building by sparse inversion of hyperboloidal components

September 15, 2019
Masoonzadeh, Hassan Baldock, Simon Liu, Zhaojun Roende, Henrik Mason, Chuck Pal, Himadri
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Red Sea 2D Deep Tow Acquisition and Broadband Processing to Image Complex Subsalt Structures

November 19, 2018
Salem, A., W. Conway, E. T. Serra, B. Sayers, A. Checconi
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Towards AVO Compliant Least-squares RTM Gathers

August 28, 2018
He,Yang Hao,Feng Dong, Shuqian Wang, Bin
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Hybrid Approach for Least Squares Migration

August 28, 2018
Wang,Bin Zeng,Chong Dong,Shuqian
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Deblending continuous records by sparse inversion of energetic and coherent surfaces

August 28, 2018
Masoomzadeh,Hassan Baldock,Simon Liu, Zhaojun
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Geologically guided tomography to improve image below the Aptianunconformity, offshore Gambia

August 28, 2018
Kim, T., B. Soelistijo, G. Hilburn, P. Bhowmik, D. Armentrout, Z. Guo A. Nangarla
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Orthorhombic model building using 5D regularized full azimuth land data

August 28, 2018
Gao,Wei Guo,Zhiqiang Ma,Xuening Rodriguez,Gary
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SCOOP and STACK inversion case studies

August 28, 2018
Chopra, Satinder Sharma, Ritesh Kumar Keay, James
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Seismic facies classification using some unsupervised machine learning methods

August 28, 2018
Chopra, Satinder Marfurt, Kurt
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Salt tectonic styles in the spreading basin: Yucatan, Offshore Mexico

August 28, 2018
Bhowmik,Purnima Hernandez,Rodolfo Rothe,Katarina
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Implementation of Kirchhoff prestack depth migration on GPU

September 17, 2013
TGS
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The massively parallel nature of Graphics Processing Units has made them an attractive platform for some computationally intensive algorithms. This.

Enhancement of seismic data quality and interpretation for mapping base Zubair sands of Southeast Kuwait

September 16, 2013
TGS
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The Lower Zubair sand reservoirs have produced or shown oil in several but not all of the wells drilled in western and southeastern Kuwait. Evidence from.

Broadband processing of linear streamer data

September 15, 2013
TGS
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Conventional marine seismic data is affected by the interference from ghosts on both the source and receiver sides. The natural diversity provided by.

Anisotropic model building with structurally constrained tomography inversion: A case study from the Angola Basin

September 14, 2013
TGS
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The Angola basin is characterized by steeply dipping sediments with rapid changes in dip direction particularly in mini-basins between salt bodies. This.

Angle domain illumination analysis along a target horizon

September 12, 2013
TGS
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We develop an efficient scheme of illumination analysis along a target horizon. With this scheme, we can calculate the Directional Illumination (DI) from.

A case study for salt model building using CFP full azimuth data

September 10, 2013
TGS
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We present a case study of the salt model building for a Gulf of Mexico area with a full azimuth (FAZ) dataset that was created by merging two orthogonal.

3D imaging from 2D seismic data, an enhanced methodology

September 8, 2013
TGS
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We have developed an enhanced methodology for creating a 3D seismic migration volume from a set of 2D seismic lines. The key challenge is to interpolate.

3C receiver orientation estimation by stack power optimization of reflected PS data

September 2, 2013
TGS
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In land multi-component (MC) data processing, the orientation of each receiver's horizontal components in the field (H1 and H2) is seldom known.

Shale gas reservoir characterization workflows

November 26, 2012
Arcis Seismic Solutions
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As shale gas resources have emerged as a viable energy source, their characterization has gained significance. The organic content in these shales which.

Seismic attribute expression of differential compaction

November 25, 2012
Arcis Seismic Solutions
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In a marine environment, topographic features on the sea floor will usually be covered by a thick layer of shale with the rise of sea level, resulting in.

Remove RTM Artifacts Using Delayed Imaging Time Gathers

November 24, 2012
TGS
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In RTM imaging, double top salt (DTS) is frequently seen but difficult to remove by conventional post-RTM processing. This paper analyzes the DTS.

Q tomography towards true amplitude image and improve sub-karst image

November 23, 2012
TGS
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A frequency domain tomographic inversion was developed to estimate frequency dependent energy attenuation by using prestack depth migration common image.

Limits on resolution enhancement for multicomponent data

November 21, 2012
Chuck Ursenbach
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Two methods have recently been published for carrying out nonstationary spectral broadening (and narrowing) of PS data after it has been mapped into the.

Marine broadband seismic: Is the earth response helping the resolution revolution?

November 21, 2012
TGS
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Broadband seismic aims to provide a greater richness of both (a), robust low frequencies – ideal for deep structure imaging, and (b), high frequencies –.

Lifetime stability and reliability of fibre-optic seismic sensors for permanent reservoir monitoring

November 20, 2012
TGS
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Permanent reservoir monitoring (PRM) using seabed arrays of seismic sensors is becoming a well recognised tool for optimizing production and increasing.

Least-squares reverse time migration: towards true amplitude imaging and improving the resolution

November 19, 2012
TGS
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A 3D inversion based Least-Squares Reverse Time Migration (LSRTM) technique was developed. The algorithm uses the RTM as the forward modeling and.

Iterative velocity model building using GPU based layer-stripping TTI RTM

November 18, 2012
TGS
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The technology of using Tilted Transverse Isotropic Reverse Time Migration (TTI RTM) for subsalt velocity model building has been playing an important.

Interesting directions being pursued in seismic curvature attribute analysis

November 17, 2012
Arcis Seismic Solutions
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Seismic curvature attribute analysis forms an integral part of most interpretation projects as they yield useful information that adds value for the.

Improvements in time domain FWI and its applications

November 16, 2012
TGS
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In this abstract, we describe how to improve time domain full waveform inversion using source wavelet convolution, windowed back propagation and source.

Improved time and anisotropic depth imaging in the Appalachian Foothills

November 15, 2012
TGS
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We present an imaging methodology that resulted in significant enhancements in defining the subsurface geology in a survey in the Appalachian Foothills..

Improved quality for common focusing point data regularization

November 14, 2012
TGS
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The data driven 3D true azimuth Common Focusing Point (CFP) data regularization technique is a multi-dimensional data regularization tool. It can be used.

High-resolution Moveout Transform; a robust technique for modeling stackable seismic events

November 12, 2012
TGS
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We propose a time-domain approach to transform a gather of pre-stack seismic data into an ensemble of highlyresolved traces in the transformed domain..

Enhanced imaging using bandwidth extending operators and pre-stack Q-inversion over the northwest European volcanic margin

November 10, 2012
TGS
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Extensive sequences of flood basalts dominate the northwest European Atlantic margin. The basalt flows absorb and scatter the higher frequencies present.

Directional Imaging Stack (DIS) for Shot Based Pre-stack Depth Migrations

November 7, 2012
Wilfred Whiteside
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Shot based pre-stack depth migrations such as RTM are used to generate a partial image volume for each input shot gather. The conventional migrated image.

Compensating visco-acoustic effects in anisotropic resverse-time migration

November 6, 2012
TGS
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Anelastic properties of the earth cause frequency dependent energy attenuation and phase distortion in seismic wave propagation. It is preferred that.

Complex Structural Imaging in the Tarakan Basin – A Case Study, Offshore Indonesia

November 5, 2012
TGS
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Increased industry exploration interest in the Tarakan Basin, offshore East Kalimantan, Indonesia, has stimulated a need for 3D seismic data that.

5D leakage: measuring what 5D interpolation misses

November 3, 2012
Peter Cary
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5D interpolation methods have proven to be capable of overcoming the constraints of actual data acquisition in a wide range of situations. However, in.

New attribute for determination of lithology and brittleness

September 22, 2012
Arcis Seismic Solutions
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The discrimination of fluid content and lithology in a reservoir is an important characterization that has a bearing on reservoir development and its.

Orthogonal Wide Azimuth Surveys: Acquisition and Imaging

September 21, 2011
Simon Baldock, Cristina Reta-Tang, Brad Beck, Wei Gao, Jun Cai, and Steve Hightower
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We present results from a case study being performed in the Gulf of Mexico (GoM) that utilizes two orthogonal Wide Azimuth (WAZ) surveys to create an.

Maximizing Throughput for High Performance TTI-RTM: From CPU-RTM to GPU-RTM

September 19, 2011
TGS
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The implementation and production application of fast Reverse Time Migration (RTM) algorithms, especially for Tilted Transverse Isotropic (TTI) medium, is.

Layer-stripping RTM based on wavefield redatuming

September 17, 2011
TGS
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Tilted Transverse Isotropic (TTI) Reverse Time Migration (RTM) is routinely used for depth velocity model building. To improve the efficiency of RTM we.

Improved subsalt imaging using TTI anisotropy and reverse time migration scans

September 17, 2011
TGS
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We present an advanced velocity model building and imaging methodology that resulted in significant enhancements in defining the salt flanks with.

Imaging the Hoop Fault Complex via horizon and fault constrained tomography

September 16, 2011
TGS
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The Hoop Fault complex in the Southwestern Barents Sea presents an imaging challenge to accurately model the sharp velocity contrast across a major fault.

Expanding domain methods in GPU based TTI reverse time migration

September 16, 2011
Sang Suh
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Three expanding domain methods are studied which include: (1) constant velocity layer, (2) eikonal equation solver and (3) amplitude comparison. The layer.

Detailed velocity model building in a carbonate karst zone and improving sub-karst images in the Gulf of Mexico

September 14, 2011
TGS
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A velocity anomaly zone with high contrasts and small wavelength variations is often a challenge for conventional depth imaging. It requires model details.

Automatic RTM-based DIT scan picking for enhanced salt interpretation

September 13, 2011
TGS
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Delayed Imaging Time (DIT) scans based on Reverse Time Migration (RTM) are often used in production to update velocity models, particularly in subsalt or.

Applications of Layer-Stripping RTM to Gulf of Mexico Imaging Projects

September 12, 2011
TGS
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We have applied layer-stripping Reverse Time Migration (RTM) to several Gulf of Mexico (GOM) depth imaging projects. The key element of layer-stripping.

Merging multiple surveys before imaging

September 10, 2011
TGS
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We present a redatuming data regularization technique based on a 3D true azimuth Common Focusing Point (CFP) technique. It can effectively merge different.

A case study: Improved subsalt imaging through TTI model building and imaging of a WAZ survey in the Gulf of Mexico

September 8, 2011
TGS
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Here we present a case study of improved subsalt imaging for a wide azimuth (WAZ) survey in the Mississippi Canyon/Atwater Valley area in the Gulf of.

Anisotropic tomography for TTI and VTI media

September 6, 2011
TGS
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A simultaneous anisotropic tomographic inversion algorithm is developed. Check shot constraints and appropriate algorithm preconditioning play an.

3D RTM angle gathers from source wave propagation direction and dip of reflector

September 3, 2011
TGS
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Creating an angle gather is a conceptually simple process of plotting reflection amplitudes along the angle. Reflection or opening angle can be directly.

Stepwise Multiple Elimination using Linear Transforms: An alternative approach to SRME for stacking multiple-free near offsets in the Barents Sea

October 17, 2010
TGS
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A novel, de-aliased method called Stepwise Multiple Elimination using Linear Transforms (SMELT) is introduced as an alternative to 2-D Surface Related.

Stability and speedup issues in TTI RTM implementation

October 15, 2010
TGS
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In the implementation of TTI RTM, we meet stability problems and demands for speedup. Staggered Fourier first derivative and linear interpolation improves.

Mississippi Canyon high resolution reprocessing: applications for shallow drilling hazard and geologic evaluation

October 12, 2010
TGS
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A joint contractor-company project was undertaken to evaluate the practicality and utility of shallow high resolution reprocessing of large deepwater.

Interactive demultiple in the post-migration depth domain

October 11, 2010
TGS
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In efforts to further improve final migrated images we have developed a new methodology for post-migration multiple removal in the migration depth domain..

Enhanced pre-stack depth imaging of wide-azimuth data from the Gulf of Mexico: a case history

October 8, 2010
TGS
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We present a case study of enhanced imaging of wideazimuth data from the Gulf of Mexico utilizing recent technologies; and we discuss the resulting.

True azimuth surface multiple elimination

October 7, 2010
TGS
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A data driven 3D true azimuth surface related multiple elimination (SRME) technique can be quite effective in removing surface related multiples for both.

Imaging beneath the Florida Escarpment progressing from 2D, 3D and anisotropy : A case history

October 5, 2010
Gary Rodriguez
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The long history of imaging in this area will be reviewed. Incremental improvements in data quality and interpretability will be shown. Processing efforts.

Complex-salt model building using combination of interactive beam migration and localized RTM

October 21, 2009
TGS
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A new salt velocity model building methodology is proposed which allows effective testing of different salt interpretation scenarios. In this methodology,.

Use of narrow azimuth data for enhanced Wavefield Extrapolation multiple prediction on a WAZ survey

October 18, 2009
TGS
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There has been a continually expanding interest in wide azimuth (WAZ) data in all its variations. We are now challenged to take full advantage of the.

Salt interpretation validated by salt tectonic study in the offshore Gulf of Mexico

October 17, 2009
TGS
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To identify and define a complex salt body with rugose top and base is essential in building an accurate velocity model for premium quality depth imaging..

Wave-equation based residual multiple prediction and elimination in migration depth domain as an aid to seismic interpretation

October 15, 2009
TGS
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We have developed a new methodology for predicting and removing multiples in the migration depth domain based on wavefield extrapolation and attribute.

Source separation of simultaneous source OBC data

October 13, 2009
TGS
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To attain the benefits of simultaneous shooting in marine data acquisition, either the simultaneous sources have to be placed far apart to minimize the.

Constrained propeller ship noise removal and its application to OBC data

October 11, 2009
TGS
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A constrained propeller ship noise removal technique for OBC data has been developed. The constraints include the ship lane information, global linear.

Reverse-time migration by fan filtering plus wavefield decomposition

October 10, 2009
TGS
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The conventional zero-lag crosscorrealtion imaging condition of reverse-time migration is subject to strong migration artifacts. This paper studies.

From SRME or wave-equation extrapolation to SRME and wave-equation extrapolation

October 6, 2009
TGS
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Better de-multiple results are achieved by combining the strengths of SRME and wave field extrapolation techniques. In this paper, we illustrated three.

Freedom Wide-Azimuth Processing and Imaging, a case history study of WAZ imaging in Mississippi Canyon, Gulf of Mexico

October 5, 2009
TGS
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Wide-azimuth (WAZ) data is the most significant advance to have occurred in seismic acquisition and processing since the introduction of 3D seismic in the.

Improved Imaging through Anisotropic Depth Migration and High-Resolution Shallow Tomography In Lieu Of Refraction Statics in South Timbalier Trench Area

October 3, 2009
TGS
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We present a case study of an anisotropic prestack depth migration (APSDM) project which used high-resolution, shallow tomography and anisotropic model.

TTI/VTI anisotropy estimation by focusing analysis, Part II: application

October 2, 2009
TGS
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The workflow for the practical application of the automated focusing analysis in time domain is demonstrated by deriving the TTI anisotropy parameters,.

TTI/VTI anisotropy parameters estimation by focusing analysis, Part I: theory

October 1, 2009
TGS
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Time domain and depth domain focusing operators are introduced to estimate anisotropic parameters. The fully automated time domain focusing operator to.

Salt interpretation for depth imaging – where geology is working in the geophysical world

October 1, 2009
TGS
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Accurate salt interpretation involves an integration of geology and geophysics. In the practice of salt interpretation and model building in depth.

Beam-based Interactive Imaging for Salt Interpretation and Salt Model Building

November 12, 2008
TGS
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It is well understood that accurate salt interpretation is critical to subsalt imaging. When reflections from the saltsediment boundaries are not.

Challenges in Time & Depth: Imaging the Eastern Delta OBC Survey, a Case History

November 10, 2008
TGS
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Immediately offshore of the Mississippi Delta the geological setting conspires with numerous production installations to produce a unique set of problems.

Impacts of Seismic Anisotropy and Subsalt Velocity Updates in Imaging, Deepwater Gulf of Mexico

November 9, 2008
TGS
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Seismic anisotropy refers to seismic waves traveling with different velocity at different propagation angle, usually in consolidated, shale-prone areas.

A new multiple subtraction method using the attributes of predicted multiples

November 9, 2008
TGS
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Despite the development of excellent techniques for predicting multiples such as convolution based or wavefield extrapolation based approaches,.

Localized reverse time migration for salt model building

November 9, 2008
TGS
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Salt model building is a key process for successful subsalt imaging. In complex areas, Reverse Time Migration (RTM) provides better images than One-way.

Multiple Prediction by Wavefield Extrapolation in Common-P Domain

November 7, 2008
TGS
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Wavefield extrapolation (WFE) multiple prediction typically operates in common shot domain, and is very effective to predict complex multiples such as.

A Multi-Step Approach for Efficient Reverse-Time Migration

November 6, 2008
TGS
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Reverse-time migration (RTM) provides superior images in areas where there are steep salt flanks or other complex geologic structures. However, the high.

Enhanced Anisotropic Model Building Methodology and Pre-stack Depth Imaging in Deep Water Gulf Of Mexico: A case history

November 2, 2008
TGS
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We present a case study of anisotropic model building and the resulting accuracy of event placement and improved image quality. Approximately 660 OCS.

Subsalt Velocity Update Using RTM-based DT Scan

November 2, 2008
TGS
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Subsalt wave-equation based migration (WEM) scan is an effective way for subsalt velocity updating, and has become an industry standard practice; however,.

Differential OBC processing techniques

September 14, 2007
TGS
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Compared to surface seismic, the increased complexity associated with seafloor seismic data (OBC) requires considerable attention to details if a.

Repeat imaging using grid tomography and new well information: application to two sub-salt fields in the Gulf of Mexico

September 12, 2007
TGS
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The goal of repeat imaging (detailed studies of prospects as new information is available) using PSDM is to generate new locations for both development.

Fast velocity model building using kinematic demigration and migration

September 8, 2007
TGS
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3-D prestack depth migration is the most time consuming part in velocity model building. To minimize the required iteration of depth migration, we first.

Kirchhoff or wave equation?

October 26, 2003
BP
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Wave equation (or wave field extrapolation) techniques have been used in industry for the past few years, with the purpose to improve the accuracy of 3D.