Application of the unwrapped phase inversion to land data without source estimation
Type
ArticleKAUST Department
Earth Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Seismic Wave Analysis Group
Date
2015-08-19Online Publication Date
2015-08-19Print Publication Date
2015-08-19Permanent link to this record
http://hdl.handle.net/10754/593186
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Unwrapped phase inversion with a strong damping was developed to solve the phase wrapping problem in frequency-domain waveform inversion. In this study, we apply the unwrapped phase inversion to band-limited real land data, for which the available minimum frequency is quite high. An important issue of the data is a strong ambiguity of source-ignition time (or source shift) shown in a seismogram. A source-estimation approach does not fully address the issue of source shift, since the velocity model and the source wavelet are updated simultaneously and interact with each other. We suggest a source-independent unwrapped phase inversion approach instead of relying on source-estimation from this land data. In the source-independent approach, the phase of the modeled data converges not to the exact phase value of the observed data, but to the relative phase value (or the trend of phases); thus it has the potential to solve the ambiguity of source-ignition time in a seismogram and work better than the source-estimation approach. Numerical examples show the validation of the source-independent unwrapped phase inversion, especially for land field data having an ambiguity in the source-ignition time.Citation
Yunseok Choi*, Tariq Alkhalifah, and Bryan DeVault (2015) Application of the unwrapped phase inversion to land data without source estimation. SEG Technical Program Expanded Abstracts 2015: pp. 1225-1229. doi: 10.1190/segam2015-5873514.1Publisher
Society of Exploration GeophysicistsAdditional Links
http://library.seg.org/doi/10.1190/segam2015-5873514.1ae974a485f413a2113503eed53cd6c53
10.1190/segam2015-5873514.1