MCTMIG: Migration depth slice obtained using MCTMIG on a Gulf of Mexico salt dome prospect.

3DGeo currently markets and licenses, MCTMIG, a three-dime nsional (3-D) poststack depth migration program based on a state-of-the-art explicit finite-difference wavefield method that implements a proprietary version (Biondo and Palacharla, 1994) of the Hale-McClellan algorithm. This software product, including associated data processing services based on MCTMIG, are marketed and sold on a collaborative basis with Fujitsu America Inc. and Advanced Data Systems (ADS).

MCTMIG is integrated with a ProMAX interface and available on parallel-vector supercomputers, vector supercomputers, and other architectures. Together with Fujitsu America Inc., 3DGeo offers a 3-D migration service with a fast turnaround time and at a competitive price.

MCTMIG: Advanced Migration Algorithm
The 3-D depth migration (MCTMIG) program developed by 3DGeo is based on a state of the art explicit finite-difference wavefield extrapolation method that implements a proprietary version of the popular Hale-McClellan algorithm. This finite-difference migration can correctly migrate arbitrarily dipping reflectors even in the presence of severe lateral velocity variations, such as those occurring at salt-sediment interfaces. The 3DGeo version of the McClellan transform corrects the anisotropy and frequency dispersion of the conventional migration operator. The 3DGeo version achieves higher accuracy than standard 3-D migration methods, at almost no additional computational cost by combining the original McClellan filter with a new transformation filter (Biondi and Palacharla, 1994). Furthermore, the computational efficiency of 3DGeo's migration is enhanced by the proprietary design of the explicit finite-difference downward continuation operator that strikes an optimal balance between cost and maximum migration angle. Compared with phase shift plus correction methods, MCTMIG images correctly the steep dips even for sharp velocity contrasts. Compared to 3-D splitting methods, MCTMIG has no directional anisotropy or numerical dispersion, eliminating imaging errors at azimuths not aligned with the inline or crossline directions.

MCTMIG: Superior Performance Across Platforms
MCTMIG implements a unique algorithm that executes efficiently on platforms ranging from massively parallel computers to traditional vector supercomputers or cache-based workstations. The MCTMIG implementation on the Fujitsu VPP parallel-vector computers exploits the vector hardware functionality to achieve maximum performance. The algorithm is also flexible with respect to I/O, and readily adapts to different system configurations for to allow an optimal trade-off between memory requirements, disk space requirements, and performance. Turnaround time of the migration strongly depends on the computing platform and migration parameters such as downward continuation operator length and migration velocity. Typically, 3DGeo's software migrates a million-trace survey in several hours.

MCTMIG: Easy Integration
The migration package is modular in design and can be customized to a client's specific requirements. MCTMIG is available on both Fujitsu VPP parallel-vector supercomputers, VPX vector supercomputers, and other architectures. If desired, 3DGeo can integrate the package into a client's processing environment. The ProMAX or Focus interface of MCTMIG allows the user to set all the migration parameters, submit the job to the supercomputer for execution, and view the intermediate and final results in a familiar software environment. Any widely used seismic data format is accepted, as well as irregular geometries for both the data and the velocity model.

MCTMIG: Data Processing Services
Together with Fujitsu America Inc., 3DGeo offers a 3-D poststack migration service with a fast turnaround of one week at a competitive price. Iterative migrations for refining the velocity model are further discounted 25% from the one iteration price. In addition, any customer required features can be included in the migration program. 3DGeo will perform an experimental migration run on a parallel computer made available by the client or provided by 3DGeo at nominal cost.