Technical Library

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

Orthogonal Wide Azimuth Surveys: Acquisition and Imaging

September 21, 2011
Simon Baldock, Cristina Reta-Tang, Brad Beck, Wei Gao, Jun Cai, and Steve Hightower
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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.

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.

Expanding domain methods in GPU based TTI reverse time migration

September 16, 2011
Sang Suh
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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.

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.