Type
Conference PaperKAUST Department
Earth Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Date
2017-05-26Online Publication Date
2017-05-26Print Publication Date
2017-06-12Permanent link to this record
http://hdl.handle.net/10754/626961
Metadata
Show full item recordAbstract
Macro velocity building is important for subsequent prestack depth migration and full waveform inversion. Wave equation migration velocity analysis (WEMVA) utilizes band-limited waveform to invert the velocity in an automatic manner. Normally, inversion would be implemented by focusing the subsurface offset common image gathers(SOCIGs). We re-examine it with a different perspective and propose to view the SOCIGs and the background wavefield together as subsurface offset virtual sources(SOVS). A linear system connecting the perturbation of the position of those SOVS and velocity is derived and solved subsequently using a conjugate gradient method. Both synthetic and real dataset examples verify the correctness and effectiveness of the proposed method.Citation
Sun B, Alkhalifah T (2017) Automatic WEMVA by Focusing Subsurface Offset Virtual Sources. 79th EAGE Conference and Exhibition 2017. Available: http://dx.doi.org/10.3997/2214-4609.201700837.Sponsors
The real data shown in this study is proprietary to and provided courtesy of CGG company. We are grateful to them. The authors also thank for the resources of the supercomputing Laboratory at KAUST.Publisher
EAGE Publicationsae974a485f413a2113503eed53cd6c53
10.3997/2214-4609.201700837