On Stolt stretch time migration

Louis Vaillant and Sergey Fomel

louis@sep.stanford.edu, sergey@sep.stanford.edu

ABSTRACT

We implement Stolt-stretch time migration with an analytical formulation for the optimal stretch parameter and show how it improves the quality of imaging. By a cascaded f-k migration approach with this algorithm, we manage to obtain time migration results on real data comparable to Gazdag's phase-shift method, with a high accuracy for steeply deeping events at a computational cost dramatically lowered.