3-D waveform tomography sensitivity kernels for anisotropic media
Type
Conference PaperAuthors
Djebbi, Ramzi
Alkhalifah, Tariq Ali

KAUST Department
Earth Science and Engineering ProgramEnvironmental Science and Engineering Program
Physical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Date
2014Permanent link to this record
http://hdl.handle.net/10754/564841
Metadata
Show full item recordAbstract
The complications in anisotropic multi-parameter inversion lie in the trade-off between the different anisotropy parameters. We compute the tomographic waveform sensitivity kernels for a VTI acoustic medium perturbation as a tool to investigate this ambiguity between the different parameters. We use dynamic ray tracing to efficiently handle the expensive computational cost for 3-D anisotropic models. Ray tracing provides also the ray direction information necessary for conditioning the sensitivity kernels to handle anisotropy. The NMO velocity and η parameter kernels showed a maximum sensitivity for diving waves which results in a relevant choice of those parameters in wave equation tomography. The δ parameter kernel showed zero sensitivity; therefore it can serve as a secondary parameter to fit the amplitude in the acoustic anisotropic inversion. Considering the limited penetration depth of diving waves, migration velocity analysis based kernels are introduced to fix the depth ambiguity with reflections and compute sensitivity maps in the deeper parts of the model.Citation
Djebbi, R., & Alkhalifah, T. (2014). 3-D Waveform Tomography Sensitivity Kernels for Anisotropic Media. Proceedings 76th EAGE Conference and Exhibition 2014. doi:10.3997/2214-4609.20140786Publisher
EAGE PublicationsConference/Event name
76th European Association of Geoscientists and Engineers Conference and Exhibition 2014: Experience the Energy - Incorporating SPE EUROPEC 2014ISBN
9781632666949ae974a485f413a2113503eed53cd6c53
10.3997/2214-4609.20140786