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Target-Oriented Image Domain Q Tomography Using Ray-Based MethodNormal access

Authors: Z. Yu and Y. Liu
Event name: 81st EAGE Conference and Exhibition 2019
Session: Poster: Tomography
Publication date: 03 June 2019
DOI: 10.3997/2214-4609.201901366
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 589.48Kb )
Price: € 20

Summary:
Seismic wave attenuation, typically quantified by Q, is a notoriously challenging problem in seismic imaging and interpretation with poor signal-to-noise ratio (S/N) and poor resolution. To produce a reliable Q model, we propose a Q tomography method which is based on ray-tracing theory applied on migrated images. To measure Q on the migrated images, we adopt the extended spectral ratio method developed by Shen et al (2018). This new extended spectral ratio method yields the wavenumber-dependent common factors instead of frequency-dependent factors which can be implemented by ray-tracing methods directly. Numerical tests demonstrate the feasibility of this Q estimation method and lead to a noticeable improvement in the image quality.


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