
WEI Yajie, HAN Liguo, DUAN Chaoran, WANG Hongye and GUO Kun
世界地质(英文版) ›› 2014, Vol. 17 ›› Issue (4) : 238-242.
Study of frequency domain full waveform inversion based on#br# Huber norm and L- BFGS algorithm
Full waveform inversion (FWI) is a high resolution inversion method,which can reveal detailed in- formation of the structure and lithology under complex geological background. It is limited by many kinds of noi- ses when the method applied to the real seismic data. Based on Huber function criterion,the objective function combinates the anti- noise of L 1 norm and the stability of L 2 norm in theory,the authors derive the gradient for- mula of the Huber function by using L- BFGS algorithm for FWI. The new method is proved by synthetic seismic data with the Gaussian noise and the impulse noise. Numerical test results show that L- BFGS algorithm is ap- plied to the frequency domain FWI with the convergence speed and high calculation accuracy,and can effec- tively reduce computer memory usage; and the Huber function is more robust and stable than L 2 norm even with the noises.
full waveform inversion / Huber function / L- BFGS algorithm / anti- noise
/
〈 |
|
〉 |