Technical Library

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

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Shale gas reservoir characterization workflows

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November 26, 2012
Author: Arcis Seismic Solutions
Filed Under: SEG
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

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November 25, 2012
Author: Arcis Seismic Solutions
Filed Under: SEG
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

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November 24, 2012
Author: TGS
Filed Under: SEG
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

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November 23, 2012
Author: TGS
Filed Under: SEG
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

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November 21, 2012
Author: Chuck Ursenbach
Filed Under: SEG
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?

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November 21, 2012
Author: TGS
Filed Under: SEG
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

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November 20, 2012
Author: TGS
Filed Under: SEG
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

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November 19, 2012
Author: TGS
Filed Under: SEG
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

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November 18, 2012
Author: TGS
Filed Under: SEG
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

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November 17, 2012
Author: Arcis Seismic Solutions
Filed Under: SEG
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

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November 16, 2012
Author: TGS
Filed Under: SEG
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

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November 15, 2012
Author: TGS
Filed Under: SEG
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

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November 14, 2012
Author: TGS
Filed Under: SEG
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

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November 12, 2012
Author: TGS
Filed Under: SEG
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

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November 10, 2012
Author: TGS
Filed Under: SEG
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

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November 7, 2012
Author: Wilfred Whiteside
Filed Under: SEG
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

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November 6, 2012
Author: TGS
Filed Under: SEG
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

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November 5, 2012
Author: TGS
Filed Under: SEG
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

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November 3, 2012
Author: Peter Cary
Filed Under: SEG
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

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November 1, 2012
Author: Simon Baldock and Nick Myziuk
Filed Under: Oilfield Technology
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..