Estimation of the anisotropy parameters from imaging moveout of diving wave in a factorized anisotropic medium
Type
ArticleKAUST Department
Astronomy and Geophysical Research InstituteEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Date
2016-06-10Online Publication Date
2016-06-10Print Publication Date
2016-07Permanent link to this record
http://hdl.handle.net/10754/614414
Metadata
Show full item recordAbstract
The importance of diving waves is being realized because they provide long-wavelength model information, which can be used to help invert for the reflection information in full-waveform inversion. The factorized model is defined here as a combination of vertical heterogeneity and constant anisotropy, and it admits closed-form description of the traveltime. We have used these resulting analytical formulas to describe the behavior of diving waves in a factorized anisotropic medium, and we used an approximate imaging moveout formulation (residual moveout after imaging) to update the velocity model when the wrong model parameters (isotropic assumption) were used for imaging. We then used these analytical representations of the image moveout to establish a semblance analysis framework to search for the optimal anisotropic parameters. We have also discussed different parameterizations of the factorized medium to find the one that gave the best accuracy in anisotropy parameters estimation.Citation
Estimation of the anisotropy parameters from imaging moveout of diving wave in a factorized anisotropic medium 2016, 81 (4):C139 GEOPHYSICSSponsors
We would like to thank W. Weibull for providing the modeling and RTM codes and C. Wang from Tongji University for his useful discussions. We acknowledge the China Scholarship Council and the ROSE Project for financial support and KAUST for its support. We also would like to acknowledge the associate editor and the reviewers for their instructive comments.Publisher
Society of Exploration GeophysicistsJournal
GEOPHYSICSAdditional Links
http://library.seg.org/doi/10.1190/geo2015-0600.1ae974a485f413a2113503eed53cd6c53
10.1190/geo2015-0600.1