Full
Outline
In marine exploration, velocity modeling of complex deep-water salt is an extremely challenging task. On the one hand, complex salt structures exist in a unique environment where seawater coexists with elastic media; on the other hand, the strong amplitude converted waves generated by high-velocity complex salt can affect the accuracy of traditional acoustic velocity modeling. Therefore, it is essential to fully consider these critical factors in order to carry out P- and S-wave velocity waveform inversion modeling for such special structures. Addressing the challenges faced in velocity modeling of complex deep-water salt using towed streamer data, this paper employs a method of boundary coupling between acoustic and elastic wave equations to construct an acoustic-elastic coupled equation (AECE). This equation is more suitable for simulating the propagation process of seismic waves in the overlying seawater elastic media. Through numerical simulations of a three-layered model, we have verified the feasibility of using towed streamer data for S-wave velocity inversion. Subsequently, we derived the waveform inversion gradient operator applicable to the acoustic-elastic coupled equation and established a method for P- and S-wave velocity waveform inversion of complex salt based on towed streamer data. Finally, we validated the applicability and accuracy of this new method through inversion tests conducted on a complex salt media model constructed based on actual overseas geological conditions, as well as through inversion trials using towed streamer data.
215
100
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
