Global Geology 2018, 21(1) 68-76 DOI:   10.3969/j.issn.1673-9736.2018.01.08  ISSN: 1673-9736 CN: 22-1371/P

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Keywords
full waveform inversion
wavelet packet envelope
local minima
cycle skipping
Authors
ZHANG Tianze
HAN Liguo
PubMed
Article by Zhang T
Article by Han L

Wavelet packet envelope multi-scale full waveform inversion

ZHANG Tianze, HAN Liguo

College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China

Abstract��

Full waveform inversion (FWI) is an effective tool for constructing high resolution velocity models, but it is affected by a local minima problem. Without long offsets and low frequency data, it is difficult to apply the conventional multi-scale FWI to actual seismic data. In this study, the large offset and low frequency information are provided by the method of wavelet packet envelope for the conventional FWI. The gradient can be computed efficiently with the adjoint state method without any additional computational cost. Marmousi synthetic data is used to illustrate that, compared with Hilbert envelope-based FWI, wavelet packet envelope FWI can provide an adequately accurate model for the conventional FWI approach even when the initial model is far from the true model and the low-frequency data are missing.

Keywords�� full waveform inversion   wavelet packet envelope   local minima   cycle skipping  
Received 2017-10-18 Revised 2017-11-15 Online:  
DOI: 10.3969/j.issn.1673-9736.2018.01.08
Fund:Supported by Project of National Natural Science Foundation of China (41674124) and National Key Research and Development Program of China (2016YFC0600301).
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1��YIN Chang, SUN Jianguo, MIAO He, YAN Hongqun.Full waveform inversion based on initial model built from envelope inversion[J]. Global Geology, 2018,21(1): 62-67

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