Technical Library

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

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.