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PSDM 2, The Sequel

The first 20% of the full text of this article appears below.

The first special section on prestack depth migration (PSDM) was published in May 2001. The papers provided a synopsis of the state of PSDM at that time. In fact, some issues limiting greater employment of PSDM described in that special section are still prevalent today—i.e., poor data quality, improper geologic models and velocity fields, inaccurate processing algorithms, anisotropy, near surface effects, lack of true amplitude preservation, and relatively high computing costs to run the full wave equation PSDM algorithms. However, the industry has since made great strides to resolve these issues because of the rapid growth in computing power and development of more efficient migration algorithms. It was due to these advances that TLE decided to revisit this depth imaging technology and quickly publish a sequel.

This special section contains eight articles that pinpoint some improvements made over the last 18 months. The first two articles by Guo and Fagin describe the velocity model building process as it is commonly practiced today and how this ultimately dictates the quality of the final depth image. The articles are written with the depth imager and interpreter in mind because the . . . [Full Text of this Article]