Multiscale phase inversion for 3D ocean-bottom cable data

Fu, Lei1; Feng, Zongcai2; Schuster, Gerard T.2

2019-10-21

10.1111/1365-2478.12878

GEOPHYSICAL PROSPECTING   影响因子和分区

0016-8025

1365-2478

We invert three-dimensional seismic data by a multiscale phase inversion scheme, a modified version of full waveform inversion, which applies higher order integrations to the input signal to produce low-boost signals. These low-boost signals are used as the input data for the early iterations, and lower order integrations are computed at the later iterations. The advantages of multiscale phase inversion are that it (1) is less dependent on the initial model compared to full waveform inversion, (2) is less sensitive to incorrectly modelled magnitudes and (3) employs a simple and natural frequency shaping filtering. For a layered model with a three-dimensional velocity anomaly, results with synthetic data show that multiscale phase inversion can sometimes provide a noticeably more accurate velocity profile than full waveform inversion. Results with the Society of Exploration Geophysicists/European Association of Geoscientists and Engineers overthrust model shows that multiscale phase inversion more clearly resolves meandering channels in the depth slices. However, the data and model misfit functions achieve about the same values after 50 iterations. The results with three-dimensional ocean-bottom cable data show that, compared to the full waveform inversion tomogram, the three-dimensional multiscale phase inversion tomogram provides a better match to the well log, and better flattens angle-domain common image gathers. The problem is that the tomograms at the well log provide an incomplete low-wavenumber estimate of the log's velocity profile. Therefore, a good low-wavenumber estimate of the velocity model is still needed for an accurate multiscale phase inversion tomogram.

Full-waveform inversion OBC Seismic inversion

SCI ; EI

英语

第一 ; 通讯

King Abdullah University of Science and Technology[] ; King Abdullah University of Science and Technology[]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000491178500001

WILEY

20194407598180

Cables ; Geophysical prospecting ; Seismology ; Velocity ; Waveform analysis ; Well logging

Geophysical Prospecting:481.4 ; Earthquake Measurements and Analysis:484.1 ; Data Processing and Image Processing:723.2

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
2.King Abdullah Univ Sci & Technol, Div Phys Sci & Engn, Thuwal 23955, Saudi Arabia

Fu, Lei,Feng, Zongcai,Schuster, Gerard T.. Multiscale phase inversion for 3D ocean-bottom cable data[J]. GEOPHYSICAL PROSPECTING,2019,68(3):786-801.

Fu, Lei,Feng, Zongcai,&Schuster, Gerard T..(2019).Multiscale phase inversion for 3D ocean-bottom cable data.GEOPHYSICAL PROSPECTING,68(3),786-801.

Fu, Lei,et al."Multiscale phase inversion for 3D ocean-bottom cable data".GEOPHYSICAL PROSPECTING 68.3(2019):786-801.