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Elastic Full Waveform Inversion with Convolution-Based Crosstalk-Free Source-Encoding Algorithm
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 81st EAGE Conference and Exhibition 2019, Jun 2019, Volume 2019, p.1 - 5
Abstract
Simultaneous-source method can dramatically improve the efficiency of FWI but faces the problems of crosstalk noise and data mismatch. Besides, additional source wavelet estimation, which is critical for successful FWI, will counteract the efficiency of simultaneous-source algorithm. In this paper, different from conventional solutions, we propose the source-independent elastic FWI with the convolution-based crosstalk-free source-encoding algorithm. Time-domain blended simultaneous-source wavefield can be deblended and expressed as a few frequency-domain snapshots so that this algorithm can be naturally applied to unfixed-spread acquisition system, avoid the crosstalk noise and reduce the great memory requirement to a large degree. Synthetic examples verify the efficiency and accuracy of the propose algorithm with a strong robustness to different incorrect wavelets.