Abstract
Since the large amount of surface-related multiple existed in the marine data would influence the results of data processing and interpretation seriously, many researchers had attempted to develop effective methods to remove them. The most successful surface-related multiple elimination method was proposed based on data-driven theory. However, the elimination effect was unsatisfactory due to the existence of amplitude and phase errors. Although the subsequent curvelet-domain multiple–primary separation method achieved better results, poor computational efficiency prevented its application. In this paper, we adopt the cubic B-spline function to improve the traditional curvelet multiple matching method. First, select a little number of unknowns as the basis points of the matching coefficient; second, apply the cubic B-spline function on these basis points to reconstruct the matching array; third, build constraint solving equation based on the relationships of predicted multiple, matching coefficients, and actual data; finally, use the BFGS algorithm to iterate and realize the fast-solving sparse constraint of multiple matching algorithm. Moreover, the soft-threshold method is used to make the method perform better. With the cubic B-spline function, the differences between predicted multiple and original data diminish, which results in less processing time to obtain optimal solutions and fewer iterative loops in the solving procedure based on the L1 norm constraint. The applications to synthetic and field-derived data both validate the practicability and validity of the method.
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Acknowledgements
The author would like to thank P. Moghaddam and C. Brown for developing valuable curvelet transform software. This research was supported by the National Natural Science Foundation of China (Grant No. 41374108) and the National Foundation for Science and Technology Development of China (2016ZX05026-002-003).
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Wang, T., Wang, D., Tian, M. et al. Curvelet-domain multiple matching method combined with cubic B-spline function. Acta Geophys. 66, 559–573 (2018). https://doi.org/10.1007/s11600-018-0155-9
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DOI: https://doi.org/10.1007/s11600-018-0155-9