TGS Commercializes G-Beam Migration Algorithm

TGS-NOPEC Geophysical Company (TGS) announced the commercialization of its generalized beam (G-Beam) Migration. The internally developed G-Beam Migration is the Company's first production implementation of this pre stack depth imaging method.

The G-Beam approach efficiently bridges the gap between the single arrival problem of Kirchhoff migration and the steep-dip limit of one-way wave equation migration for imaging salt prone areas. The TGS G-Beam is a generalized form of beam migration using all possible beams during the downward continuation of the wave field. Its application to pre stack data is designed to yield high quality depth images in complex geologic settings such as under salt with much faster turnaround time than was previously possible using traditional wave equation pre stack depth algorithms. The G-Beam Migration coupled with the Company's super-computer capacity allows TGS to deliver 3D migrated cubes covering up to 700 OCS blocks (16,300 square kilometers) per week to its clients. The ability to generate large, high quality data sets in a short time gives the interpreting geoscientist the means to develop and test more geologic scenarios and create more accurate velocity models. This iterative process leads to more precise images of the subsurface in increasingly difficult exploration basins.

With today's announcement, TGS now has proprietary depth migration algorithms utilizing Kirchhoff, Wave Equation, and Beam methods. The Company's R&D group is working on additional variants of these methods and even new methods to provide clients with the best possible tools to address their specific imaging problems. "Today's algorithms must simultaneously improve data quality in tough subsalt areas where many E&P companies want to explore AND must be very fast in order to deal with the large amounts of data being acquired," said Hank Hamilton, Chief Executive Officer. "Our research is advancing a number of new techniques and we expect to commercialize other products in the months to come."


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