Technical Library

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

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22 March 2019
The application of full-waveform inversion (FWI) to bring high resolution to the velocity model is becoming a standard approach in the velocity.
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14 October 2018
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.
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01 June 2018
By the end of 2018 TGS will have acquired a total of 45,000 km2 of high resolution 3D seismic across the Møre and Vøring Basins in the Norwegian Sea. This.
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01 October 2017
Recent exploration in Liberia has not provided the commercial success we all want, with the most recent well, Mesurado-1 (drilled by ExxonMobil in Block.
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01 September 2017
Oklahoma is one of the most mature oil- and gas-producing states, yet the industry continues to innovate and make headlines with new investment.
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01 September 2016
Clari-Fi™ is a broadband processing package which includes denoising, deghosting, designature and inverse-Q. A multi-domain denoising process attenuates.
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01 July 2016
TGS chief executive Kristian Johansen is surprisingly relaxed for an oilman weathering his first major downturn, but with perspective gained outside the.
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01 February 2016
In the current market companies are required to increase emphasis on efficiency and competitiveness within and between various play trends. Companies have.
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01 November 2015
Examine a data driven solution designed to improve imaging of current and future reserves in the Mississippi Canyon.
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01 October 2015
Recent big discoveries, new seismic acquisition, and a new land-tenure system have generated increased interest to explore in the offshore Newfoundland.
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01 October 2015
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.
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01 October 2015
TGS acquired a high resolution multi-client 3D seismic survey over Blocks 35, 36 and 37 in the Kwanza Basin offshore Angola. A 3D Kirchhoff and Reverse.
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01 October 2015
Volatile hydrocarbon prices are driving major changes in the industry. Companies are establishing new economic baselines and new criteria for evaluating.
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01 September 2015
 In order to assess the four key risk factors for exploration – reservoir, trap, seal, and charge (source and migration) – an interdisciplinary approach.
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01 May 2015
The Hoop Basin was named after Der Hoop, a ship belonging to one of the great Arctic explorers, William Barents. Meaning ’hope’ in his native Dutch, this.
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As 2015 begins amid uncertainty about commodity prices, one region in the Gulf of Mexico bears an interesting revival that should survive these prices.
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01 September 2014
The Hoop Fault Complex area of the Barents Sea has seen great exploration success lately. The area offers a condensed Paleozoic and Mesozoic succession.
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01 May 2014
Exploration off eastern Canada has become somewhat muted. But a recent renaissance of drilling and seismic activity has unearthed new reserves, new basins.
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The first regionally extensive long offset 2D seismic program has been acquired in the slope and deepwater regions of the Labrador Sea, offshore Canada..
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01 March 2014
operationally challenging, environmentally sensitive and seasonally limited; the vast bounds of the underexplored basins of the arctic region remain of.
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01 October 2013
TGS' new regional 2D long-offset seismic survey of the Danish sector employs innovative processing techniques already proven in the North Sea and around.
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17 September 2013
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The massively parallel nature of Graphics Processing Units has made them an attractive platform for some computationally intensive algorithms. This.
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16 September 2013
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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.
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15 September 2013
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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.
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14 September 2013
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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.
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12 September 2013
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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.
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10 September 2013
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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.
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08 September 2013
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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.
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02 September 2013
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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.
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01 September 2013
Broadband seismic data is data that is rich in both low and high frequencies. High frequencies increase temporal resolution, and low frequencies reduce.
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01 September 2013
Innovative uses of seabed seismic technology will help operators glean billions from new and mature fields. High-potential returns with low risk and lower.
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14 August 2013
n the last decade and more, shale gas resources have emerged as a viable energy source. This became possible after the Mississippian Barnett Shale in the.
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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.
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12 June 2013
Gravity coring and dredging has been used to obtain extensive seabed sampling of escarpments and potential hydrocarbon seep sites offshore Greenland in.
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08 June 2013
Conventional migration tools have been implemented by the application of adjoint operators. Under simple circumstances this approach provides satisfactory.
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06 June 2013
Wide azimuth (WAZ) has been established as an indispensable seismic acquisition and processing methodology for exploration and development objectives..
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05 June 2013
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,.
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03 June 2013
The frequency content and the temporal resolution of marine seismic data acquired using conventional constant-depth streamer is affected by the.
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02 June 2013
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.
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01 April 2013
Innovative uses of seabed seismic technology can help operators glean billions from new and mature fields. High potential returns with low risk and lower.
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Advances in technology have allowed for old geophysical records to be put online, enabling technologically adept operators to conduct geological analysis.
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01 April 2013
Marine seismic data acquired with an airgun source and recorded using pressure sensors towed at a constant depth has been the standard for offshore oil.
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01 February 2013
Andrew McBarnet assesses the state of the marine seismic business and where it is going in 2013.
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01 December 2012
Basin formation temperatures are an important consideration in oil and gas exploration and development because temperature controls the rates of chemical.
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The Santos Basin, offshore Brazil, is a geophysically challenging area to image due to the presence of evaporite sequence layers, carbonate layers and.
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01 December 2012
Innovative uses of seabed seismic technology can help operators achieve considerably higher returns from new and mature fields. High potential returns.
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26 November 2012
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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.
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25 November 2012
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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.
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24 November 2012
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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.
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23 November 2012
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A frequency domain tomographic inversion was developed to estimate frequency dependent energy attenuation by using prestack depth migration common image.
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21 November 2012
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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.
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21 November 2012
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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 –.
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20 November 2012
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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.
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19 November 2012
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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.
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18 November 2012
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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.
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17 November 2012
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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.
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16 November 2012
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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.
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15 November 2012
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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..
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14 November 2012
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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.
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12 November 2012
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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..
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10 November 2012
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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.
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07 November 2012
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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.
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06 November 2012
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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.
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05 November 2012
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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.
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03 November 2012
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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.
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01 November 2012
Seismic data acquired with an airgun source and recorded on pressure sensors has been the standard for offshore oil and gas exploration for many years..
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22 September 2012
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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.
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05 September 2012
The structural style of the African Atlantic margin shows significant differences between the passive rifted Northwest African Atlantic Margin (offshore.
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01 September 2012
Wide azimuth seismic surveying is firmly established as a key element in subsalt exploration and production in the Gulf of Mexico. The challenge now.
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01 September 2012
Wide azimuth seismic surveying is firmly established as a key element in subsalt exploration and production in the Gulf of Mexico. The challenge now.
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14 June 2012
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.
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07 June 2012
One of the fundamental challenges for anisotropic tomography is the trade-off between the inverted velocity correction and the anisotropic parameters.
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04 June 2012
Due to the accuracy of the Reverse Time Migration (RTM) algorithm, RTM angle gathers show more coherent and correct moveout subsalt events than Kirchhoff.
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02 June 2012
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.
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01 April 2012
The Liberian basin comprises offshore Liberia and Sierra Leone. Details of the regional structure and petroleum prospectivity of this frontier margin have.
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21 February 2012
Lower frequency energy in the source wavelet is more likely to penetrate through the basalt than higher frequencies as it is less attenuated by intrinsic.
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02 February 2012
With the market for Permanent Reservoir Monitoring (PRM) continuing to grow along with deepwater field expenditure (Douglas-Westwood forecasts global deep.
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01 January 2012
TGS has vast seismic experience in the Asia-Pacific region, including acquisition and advanced time and depth processing. Here we present a case study of.
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01 October 2011
We present a case study of enhanced imaging of wideazimuth data from the Gulf of Mexico utilizing recent technologies; and we discuss the resulting.
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01 October 2011
We have developed a new methodology for predicting and removing multiples in the postmigration depth domain based on wavefield extrapolation and.
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21 September 2011
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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.
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19 September 2011
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The implementation and production application of fast Reverse Time Migration (RTM) algorithms, especially for Tilted Transverse Isotropic (TTI) medium, is.
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17 September 2011
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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.
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17 September 2011
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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.
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16 September 2011
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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.
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16 September 2011
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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.
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14 September 2011
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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.
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13 September 2011
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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.
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12 September 2011
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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.
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10 September 2011
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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.
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08 September 2011
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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.
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06 September 2011
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A simultaneous anisotropic tomographic inversion algorithm is developed. Check shot constraints and appropriate algorithm preconditioning play an.
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03 September 2011
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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.
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01 July 2011
A new methodology for building salt velocity models is proposed that allows effective testing of different salt interpretation scenarios. In this.
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01 June 2011
This paper examines how the understanding of the prospectivity of the Liberia-Sierra Leone Basin has developed over the last 40 years largely due to.
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11 May 2011
A velocity anomaly zone with high contrasts and small wave length variations is often a challenge for conventional depth imaging. It requires model.
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09 May 2011
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..
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02 May 2011
Reverse Time Migration (RTM) based Delayed Imaging Time (DIT) scans have been used routinely in production to update velocity models in subsalt or low.
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01 April 2011
This paper examines how the understanding of the prospectivity of the Liberia-Sierra Leone Basin has developed over the last 40 years largely due to.
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01 March 2011
Sweet spots in the Marcellus gas shale trend are being mapped by performing geologic and petrophysical evaluation and interpretation of well log data. Log.
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09 November 2010
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.
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08 November 2010
Over the past 10 years TGS has built up a substantial geophysical database offshore Greenland. This includes over 64,000km of 2D seismic, much of which.
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07 November 2010
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.
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02 November 2010
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.
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01 November 2010
The source rock for the hydrocarbons in the Upper Jurassic, Cretaceous, and Tertiary reservoirs in the eastern Gulf of Mexico is postulated to be Upper.
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17 October 2010
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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.
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15 October 2010
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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.
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12 October 2010
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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.
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11 October 2010
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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..
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08 October 2010
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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.
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07 October 2010
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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.
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05 October 2010
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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.
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10 September 2010
The Benin Ultradeep seismic survey was acquired by TGS in 2009. 2D migrated seismic data shows the boundary between oceanic and stretched continental.
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05 September 2010
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.
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03 September 2010
Wrangel Arch represents the extensive (more, than 500 km) ~ E-W trending oshore basement high, separating the well-known shelf depressions: North and.
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01 September 2010
In January 2010 TGS completed the reprocessing of two regional long offset 2D multi-client seismic surveys in the Faroe-Shetland Basin (FSB). This.
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08 June 2010
A new salt velocity model building methodology is proposed which allows effective testing of different salt interpretation scenarios. In this methodology,.
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06 June 2010
We present a case study of an anisotropic prestack depth migration (APSDM) project which used high-resolution, shallow tomography and anisotropic model.
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05 June 2010
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.
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03 June 2010
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..
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06 April 2010
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.
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02 April 2010
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.
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01 March 2010
Despite being at the end of a long and full Annual Meeting week, the workshop “Full wave-equation methods for complex imaging challenges,” held 30 October.
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01 February 2010
Extensive thick sequences of basalt dominate the northwest flank of the Faroe Shetland Basin. Recent reprocessing of this long offset data dramatically.
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01 January 2010
Reverse time migration (RTM) is well suited for imaging steep dips in areas with high velocity contrast. In order to image steep dips at the correct.
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01 December 2009
Imaging of subsalt sediments is a challenge for traditional migration methods such as Kirchhoff and one-way waveequation migration. Consequently, the more.
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01 December 2009
Subsalt wave-equation based migration (WEM) scan is an effective way for subsalt velocity updating, and has become an industry standard practice; however,.
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21 October 2009
tags icon SEG
A new salt velocity model building methodology is proposed which allows effective testing of different salt interpretation scenarios. In this methodology,.
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18 October 2009
tags icon SEG
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.
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18 October 2009
Large areas of the south western Barents Sea remain unexplored. An integrated approach to the understanding of the south western Barents Sea is presented.
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17 October 2009
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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..
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16 October 2009
Russian Eastern Arctic shelf, including Laptev Sea, represents one of the most promising offshore areas for hydrocarbon discoveries. Nevertheless, due to.
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15 October 2009
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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.
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14 October 2009
The sedimentary basin development of the Barents Sea has been influenced by the formation of three Large Igneous Provinces (LIPS): The end-Permian (ca..
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13 October 2009
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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.
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13 October 2009
The continental margins off mid-Norway and NE Greenland share a common geological history leading up to breakup in earliest Eocene. The geology offshore.
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11 October 2009
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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.
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10 October 2009
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The conventional zero-lag crosscorrealtion imaging condition of reverse-time migration is subject to strong migration artifacts. This paper studies.
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09 October 2009
Wrangel Island is located between East Siberian and Chukchi Seas and composed of metamorphic Wrangelian Complex and overlying Silurian, Devonian,.
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08 October 2009
Here we present the synthesis of available/published geological and geophysical data on Barents Sea region, including TGS/NGP seismic data (2005) and.
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07 October 2009
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.
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06 October 2009
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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.
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05 October 2009
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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.
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04 October 2009
Metamorphic rocks of the Chukotka complex are exposed in the east Chukotka uplift and granitic-metamorphic domes (Koolen, Senyavin, Alyarmaut and etc.)..
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03 October 2009
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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.
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02 October 2009
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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,.
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01 October 2009
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.
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01 October 2009
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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.
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01 October 2009
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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.
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07 September 2009
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.
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13 June 2009
Subsalt velocity updating (Wang et al., 2004, 2006) can be categorized into two approaches: 1) Datadriven subsalt tomography based on residual moveouts;.
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03 June 2009
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.
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11 April 2009
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.
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01 April 2009
Reverse time migration (RTM), being based on the two way wave equation, can accurately account for wave propagation in both up and down directions. As a.
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01 April 2009
Exploration activity is still opening new frontiers, with one of the most recent surveys targeting the Republic of Somaliland, an autonomous region in the.
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01 February 2009
When a company is considering a new frontier area for exploration, a number of crucial questions require a rapid answer. The foremost of these is whether.
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01 January 2009
Multiple reflections of seismic waves off of the seafloor have been keeping processing experts busy for years. To get a clear image of the subsurface, the.
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01 December 2008
"We have just completed one of the most demanding seismic acquisition programmes we have ever undertaken˝, says Jørn Christiansen, principal advisor to.
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12 November 2008
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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.
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10 November 2008
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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.
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09 November 2008
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Seismic anisotropy refers to seismic waves traveling with different velocity at different propagation angle, usually in consolidated, shale-prone areas.
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09 November 2008
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Despite the development of excellent techniques for predicting multiples such as convolution based or wavefield extrapolation based approaches,.
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09 November 2008
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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.
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07 November 2008
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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.
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06 November 2008
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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.
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02 November 2008
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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.
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02 November 2008
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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,.
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Seismic imaging of hydrocarbon accumulations below salt is a formidable challenge because complexly shaped salt bodies severely distort wavefronts or.
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06 October 2008
Here we present the synthesis of available geological and geophysical data in order to discuss the presentday structure, geological history and.
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01 October 2008
The onshore and offshore portions of the Eastern Mediterranean basin (Fig. 1) have proven to be a prolific hydrocarbon producing area. As of December.
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During the Mesozoic and Early Cenozoic, and before sea floor spreading occurred in the North Atlantic Ocean, the North American and Eurasian continents.
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04 June 2008
This study addresses the regional interpretation of 2D seismic surveys across the offshore regions of Western Madagascar (Morondava Basin). It describes.
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01 June 2008
When the Kosmos/Tullow/ Anadarko group made the Mahogany and Hyedua discoveries offshore Ghana last summer, the transform margin that stretches from Benin.
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01 May 2008
In 2006, TGS-NOPEC Geophysical Company acquired 3600km of multi-client 2D seismic in the Russian Chukchi Sea in cooperation with Geophysical Solutions.
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07 April 2008
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.
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01 April 2008
From time to time it is salutary to be reminded of the complexity of the issues routinely facing oil industry geoscientists in their efforts to unlock the.
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01 February 2008
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.
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10 January 2008
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.
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Repeat imaging using grid tomography and new well information was used in two subsalt fields in the Gulf of Mexico to resolve complex imaging challenges..
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01 October 2007
The new assessment carried out by USGS indicates that northeastern Greenland may be a very important future petroleum province. If the mean estimate of 31.
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01 October 2007
Barely 6 months into an 18-monthlong exploratory program that eventually will cover more than 193,000 sq miles (500,000 sq km) of unmapped acreage in.
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14 September 2007
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Compared to surface seismic, the increased complexity associated with seafloor seismic data (OBC) requires considerable attention to details if a.
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12 September 2007
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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.
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08 September 2007
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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.
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01 September 2007
The remarkable improvements in data quality due to rapid advances in processing algorithms and computer technology over the past several years have been.
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01 May 2007
There was little industry interest in 2002 and 2003 when TGS launched the idea of aquiring a new generation of regional, long offset, long recording 2D.
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01 May 2007
In deepwater Gulf of Mexico, the new Lower Tertiary play shows great promise - as much as 15 billion bbl of potentially recoverable reserves, according to.
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01 May 2007
Interest is growing in the prospectivity of the Chukchi Sea in the Russian Arctic as new evidence emerges to support the thesis that the under-explored.
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01 January 2007
It is no secret that it is becoming more and more of a challenge to meet the expected production increases in the Gulf of Mexico. With its incredible.
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01 November 2006
In 2005 the Bureau of Minerals and Petroleum in cooperation with Nunaoil A/S and TGS-NOPEC acquired more than 3,200 km of new 2D seismic data offshore.
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01 April 2006
Until recently, interest in the petroleum prospectivity offshore West Greenland has been sporadic at best. No surprise then, that exploration off the.
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01 January 2006
T GS always had, and still has, a very different philosophy from most seismic companies, with a distinct business model," Hank explains. "In effect, TGS.
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14 September 2005
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.
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01 August 2005
The promise of easy access to multiple quality sources of oil and gas data, regardless of location, remains an elusive goal for interpreters, data.
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01 June 2005
An existing TGS-Nopec regional 2D seismic survey over offshore the eastern Mediterranean and the recently acquired 2D lines over offshore Egypt reveal a.
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01 March 2005
Dalmorneftegeophizica (DMNG), a Russian seismic company based in Yuzhno-Sakhalinsk, and TGS-NOPEC Geophysical Company (TGS), a Norwegian/American company.
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01 March 2005
Дальморнефтегеофизика (ДМНГ), Российская сейсморазведочная компания, находящаяся в Южно-Сахалинске, и геофизическая компания TGS-NOPEC (TGS),.
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01 February 2005
Two fields are currently being developed, significant amounts of oil and gas have already been found, and geological studies indicate that this is a.
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01 December 2004
Political instability at many points of the world ... rising gasoline prices ... limited natural gas and oil reserves. These are just a few of the.
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26 October 2003
tags icon SEG
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.
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