Processing
Prestack wave-equation depth migration in VTI media, The Leading Edge (2005) By: Jiaxiang Ren, Clive Gerrard, James McClean, and Mikhail Orlovich. (pdf 1581 KB)
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Multiple removal success in the Carnarvon Basin with SRME, AAPEA Journal(2005) By: Andrew Long, Ping Zhao, Roald van Borselen, Michel Schonewille, Rob Hegge (PGS Marine Geophysical), Philip Gately, Dennis Cooke (Santos Ltd.). (pdf 3806 KB)
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An efficient 3D explicit finite-difference prestack depth migration, CSEG Recorder (2005)by: Jiaxiang Ren, Clive Gerrard, James McClean, Mikhail Orlovich, & Andrew Long, PGS Marine Geophysical. (pdf 348 KB)
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3D surface-related multiple elimination: Acquisition and processing solutions, The Leading Edge (2005) By: Roald van Borselen, Michel Schoneville, Rob Hegge, PGS Marine Geophysical (pdf 4153 KB)
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What is wave equation pre-stack depth migration? An overview, PESA News (2004) By: Andrew Long, PGS Marine Geophysical (pdf 1891 KB)
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An efficient 3D explicit depth migration, ASEG Annual Meeting (2004) By: Jiaxian Ren, Clive Gerrard, James McClean, Mikhail Orlovich, Andrew Long, PGS Marine Geophysical (pdf 528 KB)
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An efficient 3D explicit finite-difference prestack depth migration, Preview (2004) By: Jiaxiang Ren, Clive Gerrard, James McClean, Mikhail Orlovich, Andrew Long, PGS Marine Geophysical (pdf 271 KB)
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True 3D data-driven multiple removal: Acquisition and processing solutions, OTC Annual Meeting (2004) By: Roald van Borselen, Michel Schonewille and Rob Hegge, PGS Marine Geophysical (pdf 1891 KB)
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3D SRME: Acquisition and processing solutions, SEG Annual Meeting (2004) By: Roald van Borselen, Michel Schonewille and Rob Hegge, PGS Marine Geophysical (pdf 1891 KB)
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An efficient 3D explicit finite-difference prestack depth migration, Preview (2004) by: Jiaxiang Ren, Clive Gerrard, James McClean, Mikhail Orlovich, and Andrew Long, PGS Marine Geophysical (pdf 274 KB)
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by Roald van Borselen, Grog Fookes, Michel Schonewille and Constantine Tsingas, PGS; and
Abu Baker Al Jeelani and Mohamad Samir Nahhas, ADCO
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An efficient way to determine interval velocities for PSDM
Walter Söllner and Wei-Yeong Yang, PGS Geophysical
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Author: John Brittan, PGS Research
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2D-4C seafloor data acquired offshore Middle East have been processed using advanced pre-stack imaging (POMZ). The resulting PP and PS data were inverted and it is shown how average and instantaneous Vp/Vs ratios can be derived.
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Multiple removal is a challenge for most seismic data. See how PGS used a 'layered' approach to successfully attenuate multiples on this 3D-2C seafloor data set.
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The objective of geophysical processing is to create an accurate picture of the subsurface. Migration of seismic data is an essential processing tool that helps to place reflected energy at the sub-surface positions where it originated. Techniques exist for migrating in time or depth. For both, an accurate velocity model is key.
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Converted-wave processing holds the key to successfully realizing the value of multi-component seafloor technology, but there are important differences between processing this data and that acquired by towed streamers. Interpretation of P-P and P-S data also presents challenges closely related to processing, where event correlation is fundamental.
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April 25, 2002
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TA-PSTM, depth imaging with improved Kirchhoff algorithms, ANIRAY ray tracing and holoSeis empowered velocity modeling.
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The removal of multiples from seismic reflection data is one of the most essential pre-processing steps in the successful imaging of the data in many marine and land environments.
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Seismic data acquired onshore usually suffer from near-surface velocity anomalies, especially in areas with high velocity basalt or carbonate outcrop. These velocity anomalies result in poor stack images in processing, and introduce long wave-length misleading structures for interpretation.
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