Since 1980, SMNG has been engaged in processing offshore seismic data acquired by SMNG as well as by other companies. SMNG currently operates two processing centers located in Murmansk and Gelendzhik equipped with the modern computer systems and capable of high quality 2D/3D offshore and onshore seismic data processing in the shortest order. The Company has the Unix Computer Cluster IBM eServer Cluster 1350 in its Murmansk center. The new systems can process large volumes of 2D and 3D data.
Hardware
| MURMANSK CENTRE | |
| Computing capacity: | I/O devices: |
| IBM eServer Cluster 1350 3,6 Ghz Intel Xeon, 64 cpu, 32 nodes, 32 x 4 Gb RAM 4 TB Disk Space |
IBM 3490 IBM 3590 Exabyte Eliant 820 DLT 7000 DLT 8000 SDLT Plotter OYO GS 636-2 |
| IBM eServer 2,8 Ghz AMD Opteron 254, BladeCenter Chassis, 5 nodes e1350 IBM Console Manager |
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| SGI Origin-2400 16xR14000 500MHz, 16 GB RAM, 1000GB Disk Space |
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| Sun ENTERPRISE 4000 4*230 MHz UltraSparc-II CPU 2 GB RAM, 350 GB Disk Space |
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| SGI Origin-2200 4CPU* 300MHz 2 GB RAM, 450 GB Disk Space |
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| SUN Ultra 60 2CPU* 450 MHz UltraSparcIII CPU 1 GB RAM, 170 GB Disk Space |
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| PC-based Workstations | |
Software
In processing, we use software by Landmark, Paradigm Geophysical, Hampson & Russell, Tricon Geophysics, the world’s leaders in the development of software tools:
- ProMax 2D/3D (Landmark) – 2D/3D seismic processing, pre-stack time and depth migration;
- Focus 2D/3D (Paradigm Geophysical) - 2D/3D seismic processing;
- Power/Image 2D/3D (Paradigm Geophysical) - 2D and 3D velocity model creation and pre-stack time and depth migration;
- Tsunami (Tricon Geophysics) - 2D and 3D depth-velocity model creation, pre-stack time and depth migration;
Using of modern processing technologies and quality of services has enabled us to carry out the most complex projects on processing of marine seismic data and the onshore-offshore data in transition zone, as the Russian Seas (the Barents, Pechora and Kara Seas, Ob and Tazov Bays, Laptev Sea and East Siberian Sea, the Azov-Black Sea Basin and the Caspian Sea) and worldwide (Shelf of Cuba, Vietnam, India and Venezuela). The operations were carried out both on the state order, and under the contracts with Russian (Rosshelf, Gazprom, Rosneft, Sevmorneftegaz, Severneftegas, Arktikshelfneftegaz, Sintezneftegaz, Zarubezhneftegaz etc.) and foreign companies (Amoco, BHP, Norsk Hydro, Neste, BGR, Phillips, Exxon, TotalFinaElf, BP, Shell, Naftogaz of Ukraine, Chernomorneftegaz and others).
Processing being performed by SMNG is aimed to receive maximal time resolution, to increase signal/noise ratio and to define dynamic response and velocity characteristics of the subsurface. Special attention is given to the elimination of near-surface effects.
The problem of residual static correction of long-period anomalies especially if permafrost rocks are observed in the near-surface section (offshore the Ob and Tazov Bays) can to some extent be settled by the use of static analysis in terms of refraction recorded in the first breaks.
To analyze statics in terms of refraction and to correct residual statics we use ProMax and GLI3D (Hampson-Russel) software packages.
The Tau-P Decon is used to increase seismic resolution of processed data and to attenuate short-period multiples.
Attenuation of strong water-bottom and peg-leg multiples is a very important stage of processing of marine seismic data. SMNG has extensive experience in applying Tau-P Decon and HR Radon for different conditions together with Trace Interpolation and Eigenvector filtering to solve aliasing problem.
In the presence of lateral velocity heterogeneity, with or without structural complexity, many of traditional seismic processing assumptions are invalid. As a consequence, correct imaging and geologic risk assessment can only be provided by Pre Stack Depth Imaging.