Technical Library

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

Suprasalt model building using full-waveform inversion

March 22, 2019
TGS
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The application of full-waveform inversion (FWI) to bring high resolution to the velocity model is becoming a standard approach in the velocity.

MSGBC: Where is the next success?

October 25, 2018
TGS

Salt tectonic styles in the spreading basin: Yucatan, Offshore Mexico

October 14, 2018
TGS
The TGS Gigante project is comprised of 188,497 km of 2D seismic data acquired in 2016 and primarily covering the offshore Mexican side of the Gulf of.

New insight into Gulf of Mexico Well Success

October 1, 2015
TGS
By analyzing the reasons for success and failure of a given well, we can learn more about the hydrocarbon system in which the well was drilled and improve.

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.

Increasing the bandwidth of marine seismic data - broadband

September 1, 2013
TGS
Broadband seismic data is data that is rich in both low and high frequencies. High frequencies increase temporal resolution, and low frequencies reduce.

The value of PRM in enabling high-payback IOR Programs

September 1, 2013
TGS
Innovative uses of seabed seismic technology will help operators glean billions from new and mature fields. High-potential returns with low risk and lower.

Key processing techniques for pre-salt plays

August 2, 2013
TGS
Abacia de Campos do Brasil é uma das regiões offshore mais ativas e prósperas de petróleo e gás no mundo, com o maior número de descobertas de petróleo e.

Seabed Sampling for Stratigraphy and Seep Studies Offshore Greenland and Norway

June 12, 2013
TGS
Gravity coring and dredging has been used to obtain extensive seabed sampling of escarpments and potential hydrocarbon seep sites offshore Greenland in.

Practical aspects of least-squares reverse time migration

June 8, 2013
TGS
Conventional migration tools have been implemented by the application of adjoint operators. Under simple circumstances this approach provides satisfactory.

Orthorhombic imaging for orthogonal wide azimuth surveys in Mississippi Canyon, Gulf of Mexico

June 6, 2013
TGS
Wide azimuth (WAZ) has been established as an indispensable seismic acquisition and processing methodology for exploration and development objectives..

Enhanced 3D Imaging from 2D Seismic Data and its Application to Surveys in the North Sea

June 5, 2013
TGS
In some of the newly explored areas around the world, 3D seismic surveys may not be available. Assessment of the exploration potential and in some cases,.

Broadband Processing of Conventional Streamer Data - Optimized De-Ghosting in the Tau-P Domain

June 3, 2013
TGS
The frequency content and the temporal resolution of marine seismic data acquired using conventional constant-depth streamer is affected by the.

A 3D Illumination Study to Investigate Fault Shadow Effects over the Hoop Fault Complex

June 2, 2013
TGS
Seismic exploration of the Norwegian Barents Sea began over thirty years ago, but the acquisition of 3-D surveys have only commenced in recent years. The.

Good guidance

Advances in technology have allowed for old geophysical records to be put online, enabling technologically adept operators to conduct geological analysis.

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.

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.

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.

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.

A comparison of structural styles and prospectivity along the Atlantic margin from Senegal to Benin

September 5, 2012
TGS
The structural style of the African Atlantic margin shows significant differences between the passive rifted Northwest African Atlantic Margin (offshore.

Spatial Distribution of Trap Types Relative to the Regional Structural Framework, Baffin Bay, Offshore Greenland

June 14, 2012
TGS
The Baffin Bay area offshore northwest Greenland represents a vast frontier exploration province. The aim of this work has been to create a new structural.

Reducing Uncertainties in Anisotropic Tomography

June 7, 2012
TGS
One of the fundamental challenges for anisotropic tomography is the trade-off between the inverted velocity correction and the anisotropic parameters.

Practical Aspects of Subsalt Tomography Using Reverse Time Migration Based Angle Gathers

June 4, 2012
TGS
Due to the accuracy of the Reverse Time Migration (RTM) algorithm, RTM angle gathers show more coherent and correct moveout subsalt events than Kirchhoff.

High-resolution Moveout Transform - A Robust Multiple Attenuation Technique

June 2, 2012
TGS
As an alternative to the conventional high-resolution Radon transform, we propose a time-domain approach to transform a gather of pre-stack seismic data.

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.

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.

Modelling low velocities in carbonate karst zones and improving sub-karst images in the Gulf of Mexico

May 11, 2011
TGS
A velocity anomaly zone with high contrasts and small wave length variations is often a challenge for conventional depth imaging. It requires model.

Horizon and fault constrained tomography to model fault induced velocity discontinuities in the hoop fault complex area

May 9, 2011
TGS
We present a case study that uses different methods of addressing a sharp velocity contrast across a major fault boundary in the southwestern Barents Sea..

Automated RTM-based DIT scans for salt interpretation and model building

May 2, 2011
TGS
Reverse Time Migration (RTM) based Delayed Imaging Time (DIT) scans have been used routinely in production to update velocity models in subsalt or low.

Imaging sub-basalt palaeocene, mesozoic and palaeozoic targets in the deep water UKCS margin: Combining effective reprocessing strategies with new deep towed acquiston

November 9, 2010
TGS
In 2009 TGS acquired 2,947 km of 2D long-offset multi-client data in the Atlantic Margin across the far northeastern part of the Faroe-Shetland Basin.

Greenland - Summary of hydrocarbon geology and structural elements

November 7, 2010
TGS
The sedimentary basins in the Baffin Sea, Davies Strait and Labrador Sea are surrounded by old continents consisting of 2.4 to 3.6 bill year Proterozoic.

Amplitude preserving demultiple in the Barents Sea over the Hoop Fault Complex: Deconstructing SRME and a new alternative method for stacking the near offsets

November 2, 2010
TGS
In 2009 TGS acquired 2,770 km2 of multi-client seismic data in the southwestern Barents Sea across the Hoop Fault Complex covering acreage nominated in.

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.

Benin Ultradeep seismic study reveals transform margin and potential hydrocarbon prospectivity

September 10, 2010
TGS
The Benin Ultradeep seismic survey was acquired by TGS in 2009. 2D migrated seismic data shows the boundary between oceanic and stretched continental.

Depositional Environment and Structural Style of Permian and Triassic Sequences of Wrangel Island, Russian Arctic

September 5, 2010
TGS
Chukchi and East Siberian Seas region represents one of the most remote and poorly studied areas of East Arctic. Wrangel Island is located between East.

The Structure of the Wrangel Arch (Russian Chukchi Sea), Based on Marine Seismic and Onshore Observations

September 3, 2010
TGS
Wrangel Arch represents the extensive (more, than 500 km) ~ E-W trending oshore basement high, separating the well-known shelf depressions: North and.

Complex-salt model building using a combination of interactive beam migration and layer-stripping RTM

June 8, 2010
TGS
A new salt velocity model building methodology is proposed which allows effective testing of different salt interpretation scenarios. In this methodology,.

Anisotropic Depth Migration and High-Resolution Tomography in Gulf of Mexico: A Case History

June 6, 2010
TGS
We present a case study of an anisotropic prestack depth migration (APSDM) project which used high-resolution, shallow tomography and anisotropic model.

The Structural Evolution and Tectonic Development of the Laptev Sea Region in Mesozoic and Cenozoic

June 5, 2010
TGS
This study is based on the series of field works on Bel kov Island (Eastern Laptev Sea region) and Khatanga Bay area (Western Laptev Sea region). It is.

Improved Sub-basalt Structural Imaging in the Faroe-Shetland Basin Using Full Sequence Migration Multi-velocity Analysis

June 3, 2010
TGS
It is widely accepted that the key to successful sub-basalt imaging in the Atlantic Margin region is to generate as much low frequency energy as possible..

The prospectivity of Offshore Sierra Leone Using Newly Acquired 3D data

April 6, 2010
TGS
Based on a previous 2D seismic survey in offshore Sierra Leone and Liberia revealing the exploration potential of the margin, a 3D long offset survey in.

Western Laptev Sea Region Framework - Structural Style and Timing of Deformation

April 2, 2010
TGS
The Laptev Sea region is one of the remote and geologically complex areas of Russian Eastern Arctic. According to the existing seismic data, a number of.

West of Shetland: Improved sub-basalt imaging

February 1, 2010
TGS
Extensive thick sequences of basalt dominate the northwest flank of the Faroe Shetland Basin. Recent reprocessing of this long offset data dramatically.

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.

An Integrated Approach to Hydrocarbon Prospectivity in the South Western Barents Sea

October 18, 2009
TGS
Large areas of the south western Barents Sea remain unexplored. An integrated approach to the understanding of the south western Barents Sea is presented.

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..

Geological Structure of South-Western Laptev Sea Region

October 16, 2009
TGS
Russian Eastern Arctic shelf, including Laptev Sea, represents one of the most promising offshore areas for hydrocarbon discoveries. Nevertheless, due to.

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.

Arctic Magmatism: Distribution, Age and Implications for Basin Development and Petroleum Systems in the Barents Sea

October 14, 2009
TGS
The sedimentary basin development of the Barents Sea has been influenced by the formation of three Large Igneous Provinces (LIPS): The end-Permian (ca..

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.

Structure and Development of the Conjugate mid-Norway - NE Greenland Margins

October 13, 2009
TGS
The continental margins off mid-Norway and NE Greenland share a common geological history leading up to breakup in earliest Eocene. The geology offshore.

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.

Sedimentary Evolution of Paleozoic and Triassic Sequences of Wrangel Island

October 9, 2009
TGS
Wrangel Island is located between East Siberian and Chukchi Seas and composed of metamorphic Wrangelian Complex and overlying Silurian, Devonian,.

The Geological Structure and Hydrocarbon Potential of East Barents Sea Region: from Overview and Comparison to the Norwegian Barents

October 8, 2009
TGS
Here we present the synthesis of available/published geological and geophysical data on Barents Sea region, including TGS/NGP seismic data (2005) and.

Sedimentary Basins of East Siberian and Chukchi Sea Shelf: the Structure and Hydrocarbon Potential

October 7, 2009
TGS
East Siberian and Chukchi Seas occupy vast area of Russian Eastern Arctic shelf, where very limited amount of seismic data is available and no offshore.

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.

Main Stages of the Tectonic Evolution of the Chukotka Peninsula and Adjacent Shelf

October 4, 2009
TGS
Metamorphic rocks of the Chukotka complex are exposed in the east Chukotka uplift and granitic-metamorphic domes (Koolen, Senyavin, Alyarmaut and etc.)..

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,.

Significant improvements in subsalt imaging

October 1, 2009
TGS
Keeping up with the latest wide-azimuth processing methods will be a popular topic at the SEG this year. TGS-NOPEC Geophysical Co. (TGS) plans to.

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.

Extended Abstract: The prospectivity of offshore Sierra Leone using newly acquired 3D data

September 7, 2009
TGS
Based on a previous 2D seismic survey in offshore Sierra Leone and Liberia revealing the exploration potential of the margin, a 3D long offset survey in.

The Northern Siberia Geology and Hydrocarbon Systems - Project and the First Results

June 3, 2009
TGS
The northern Siberia occupies a wide area with several sedimentary basins with high hydrocarbon potential. To the north from it there is the Laptev Sea.

Geological and Geophysical Evaluation of Offshore Morondava Frontier Basin based on Satellite Gravity, Well and regional 2D Seismic Data Interpretation

April 11, 2009
TGS
Madagascar is situated in the South West of the Indian Ocean at a distance of about 400 km off the East coast of Africa (figure 1). It is the third.

Acquiring seismic data in The Arctic Realm

December 1, 2008
TGS
"We have just completed one of the most demanding seismic acquisition programmes we have ever undertaken˝, says Jørn Christiansen, principal advisor to.

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,.

Geological Structure, Geodynamic Evolution and Hydrocarbon Potential of NE Black Sea Region

October 6, 2008
TGS
Here we present the synthesis of available geological and geophysical data in order to discuss the presentday structure, geological history and.

An Evaluation of the Petroleum System Offshore Morondava Basin, Madagascar

June 4, 2008
TGS
This study addresses the regional interpretation of 2D seismic surveys across the offshore regions of Western Madagascar (Morondava Basin). It describes.

New Seismic Data on the South and North Chukchi Sedimentary Basins and the Wrangel Arch and their significance for the Geology of Chukchi Sea Shelf

April 7, 2008
TGS
During the summer of 2006 TGS-NOPEC conjointly with Geophysical Solutions Integrator acquired new seismic data in the Russian part of the Chukchi Sea. The.

TGS-NOPEC launches first secure client operations portal

February 1, 2008
TGS
TGS-NOPEC Geophysical Co. (TGS) has begun activating the first of a series of new secure Internet portals where clients will be able to easily access.

Progress in imaging through Basalt on the North West Frontier

January 10, 2008
TGS
We describe a recently acquired multi-client survey over part of Hatton Bank and Basin some 750km west of Scotland. Figure 1 shows the location of the new.

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.

Regional deep water salt geology, offshore Nova Scotia, Canada

September 14, 2005
TGS
A pre-stack depth migration project has been undertaken to better image the deep water salt and associated geology of offshore Nova Scotia, Canada. A.

Multi-client seismic frontier areas, English

March 1, 2005
TGS
Dalmorneftegeophizica (DMNG), a Russian seismic company based in Yuzhno-Sakhalinsk, and TGS-NOPEC Geophysical Company (TGS), a Norwegian/American company.

Optmizing performance: Object storage for seismic applications

December 1, 2004
TGS
Political instability at many points of the world ... rising gasoline prices ... limited natural gas and oil reserves. These are just a few of the.