Fast residual static correction method using first arrivals in the 3D shot–receiver united domain
Meng Zou 1 5 Qiang Zhou 2 3 Luming Li 1 Rui Zhu 4 Kun Luo 41 College of Geophysics, Chengdu University of Technology, Chengdu 610059, China.
2 Geophysical Company of China National Petroleum Corporation Chuanqing Drilling Engineering Company Limited, Chengdu 610213, China.
3 Mountain Geophysical Technology Test Center, China National Petroleum Corporation, Chengdu 610213, China.
4 College of Mathematics, Sichuan University, Chengdu 610065, China.
5 Corresponding author. Email: ctrl_zm@126.com
Exploration Geophysics 48(3) 246-254 https://doi.org/10.1071/EG15035
Submitted: 4 May 2015 Accepted: 13 March 2016 Published: 20 April 2016
Abstract
The result of processing the residual static correction has a profound effect on the finished quality of a reconstructed image. Static correction using wave reflection techniques cannot be guaranteed when the signal-to-noise ratio is too low or the residual static correction is larger than a half-wavelength of the refracted waves. A novel method based on first arrivals in a 3D shot–receiver united domain is presented to handle these situations. This method fits and smooths the first breaks in a robust 3D way to calculate the shot and receiver static. This method has a lower sensitivity to first arrivals than traditional methods. Applications on synthetic and real data show very high performance of the presented algorithm.
Key words: 3D, first arrivals, first break time, residual static, robust fit, united domain.
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