Technical Library

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

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.

Bringing broadband to the subsea

November 1, 2012
Simon Baldock and Nick Myziuk
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..