There are lots of low wavenumber noises in the gradients of time domain full waveform inversion (FWI), which can seri-ously reduce the accuracy and convergence speed of FWI. Thus, we introduce an angle-dependent weighting factor to precondition the gradients so as to suppress the low wavenumber noises when the multi-scale FWI is implemented in the high frequency. Model ex-periments show that the FWI based on the gradient preconditioning with an angle-dependent weighting factor has faster convergence speed and higher inversion accuracy than the conventional FWI. The tests on real marine seismic data show that this method can adapt to the FWI of field data, and provide high-precision velocity models for the actual data processing.

XIA Dongming;SONG Peng;LI Xishuang;TAN Jun;XIE Chuang;WANG Shaowen;LIU Kai;ZHAO Bo;MAO Shibo

College of Marine Geoscience,Ocean University of China,Qingdao 266100,China;The Laboratory for Marine Mineral Resource,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266100,China;Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Qingdao 266100,China;First Institute of Oceanography,Ministry of Natural Resources(MNR),Qingdao 266061,China

中国海洋大学学报（自然科学英文版）

[1]XIA Dongming;SONG Peng;LI Xishuang;TAN Jun;XIE Chuang;WANG Shaowen;LIU Kai;ZHAO Bo;MAO Shibo-.Time Domain Full Waveform Inversion Based on Gradient Pre- conditioning with an Angle-Dependent Weighting Factor)[J].中国海洋大学学报（自然科学英文版）,2022(06):1479-1486

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