Title: Suppressing artifacts in prestack reverse time migration
Abstract:Two‐way migration methods require significantly greater computational resources than one‐way migration methods. However, their advantage is that they can not only handle multiarrivals, but have virtua...Two‐way migration methods require significantly greater computational resources than one‐way migration methods. However, their advantage is that they can not only handle multiarrivals, but have virtually no dip limitation, enabling imaging of overturned reflections. Reverse time migration, a wave equation technique using two‐way propagation, correctly handles both multiarrivals and the phase changes due to caustics, but by using two‐way propagation, does not suffer from dip limitation like one‐way downward continuation techniques. Although one‐way wave equation techniques can be implemented and classified as true‐amplitude migrations, reverse time migration makes no approximations that must be corrected to control amplitude. Undesired reflections from interfaces in the velocity model are easily suppressed in poststack reverse time migration by forcing acoustic impedance to be constant. This paper focuses on suppressing such artifacts in prestack reverse time migration with a zero‐lag cross correlation imaging condition by applying a directional damping term to the non‐reflecting wave equation during propagation.Read More
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 79
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