Abstract
We investigate the use of kinematic information contained in prismatic reflections for delineating structures such as overhangs of salt bodies or steeply dipping faults by means of prestack reflection tomography. From a 2D acoustic modeling experiment, we lay down guidelines for the interpretation of such reflections. Then we prove the feasibility of the inversion of prismatic reflections on 3D synthetic traveltimes. Our first attempt at inverting prismatic traveltimes interpreted in a real 3D North Sea data set leads to an interesting result but also reveals difficulties associated with local minima and with a great deal of underdetermination. Mastering these difficulties requires further investigations.
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