Imperial College London
Portrait Picture

ProfessorYanghuaWang

Faculty of Engineering, Department of Earth Science & Engineering

Principal of Resource Geophysics Academy and Director of CRG
 
 
 
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Contact

 

+44 (0)20 7594 1171yanghua.wang Website

 
 
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Location

 

2.40Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cai:2023:10.1190/geo2022-0217.1,
author = {Cai, S and Fang, F and Wang, Y},
doi = {10.1190/geo2022-0217.1},
journal = {Geophysics},
pages = {M145--M155},
title = {Nonstationary seismic-well tying with time-varying wavelets},
url = {http://dx.doi.org/10.1190/geo2022-0217.1},
volume = {88},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Seismic-well tying is an important technique for correlating well-logging curves in depth with seismic traces in time. An appropriate seismic-well tying technique must account for two types of nonstationarity: the nonstationary time errors in the synthetic seismic trace caused by the inaccurate time-depth relationship established based on sonic-logging velocity and the nonstationary seismic signals due to the time-varying wavelets during wave propagation. The nonstationary problems related to the time-depth relationship and the time-varying wavelets are interrelated in seismic-well tying procedure. We implemented a nonstationary seismic-well tying method by iteratively updating the time-depth relationship and estimating the time-varying wavelets. From the estimated time-varying wavelets, we also estimated a Q-value by assuming that the subsurface medium has a constant Q at depth and used the constant Q to constrain the variation of the seismic wavelet during propagation. Then, we used the improved time-depth relationship and time-varying wavelets with the Q constraint for further iterations. In the iterative procedure, we quantified the accuracy of the seismic-well tying result using the correlation coefficient between the synthetic and the true seismic trace in each iteration and evaluated the reliability using the normalized mean-square errors among the wavelets estimated in different iterations.
AU  - Cai,S
AU  - Fang,F
AU  - Wang,Y
DO  - 10.1190/geo2022-0217.1
EP  - 155
PY  - 2023///
SN  - 0016-8033
SP  - 145
TI  - Nonstationary seismic-well tying with time-varying wavelets
T2  - Geophysics
UR  - http://dx.doi.org/10.1190/geo2022-0217.1
UR  - http://hdl.handle.net/10044/1/107236
VL  - 88
ER  -
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