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Developing angle-domain wave path tomography for velocity analysis in complex settingsNormal access

Authors: P. Bakker and S. Gerritsen
Event name: 75th EAGE Conference & Exhibition - Workshops
Session: WS06 - Wave Equation Migration Velocity Analysis
Publication date: 10 June 2013
DOI: 10.3997/2214-4609.20131199
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 468.6Kb )
Price: € 20

Summary:
Several alternatives are discussed for the calculation of finite frequency sensitivity kernels for angle-domain wave path tomography. Starting point is an approach based on angle gathers from slant-stacked subsurface offset gathers and band-averaged frequency domain kernels. Then, to improve efficiency, shortcuts are discussed, both with respect to the angle gathers as well as the sensitivity analysis of the picked image depth. It is shown that these approaches produce satisfactory results for a 2D synthetic model updating exercise using the Sigsbee model. However, for 3D application on a realistic scale, further efficiency gains are required. One step in that direction is the estimation and usage of stationary shots.


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