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Technical Paper: Q-Compensation in Complex Media – Ray-Based and Wavefield Extrapolation Approaches

Society: SEG
Paper Number: 1130
Presentation Date: 2013
 

Abstract

We apply and compare three model-based Q-compensation approaches. The first two approaches rely upon ray-based attenuated traveltime (t*) modeling operators. One is applied prior to migration, the other one is embedded into a Kirchhoff depth migration algorithm (KDM). The third approach is based on wavepath-consistent t* modeling and is embedded into reverse time migration (RTM). Benefits and drawbacks of each of these methods are discussed and illustrated on a visco-acoustic version of the complex BP 2004 model. While ray-based Q-compensation performs well, especially when embedded within KDM, wavepathconsistent Q-compensation within RTM compensates more complex events and seems worthwhile in highly complex media. However, all approaches are prone to noise amplification issues which must be accounted for.

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