Inversion of multimodal dispersion curves from distributed acoustic sensing measurements for subsurface imaging: A field case of Garner Valley, California

Yan, Yingwei1; Chen, Xiaofei2,3; Li, Jing4; Guan, Jianbo5; Xi, Chaoqiang6; Liu, Hui4

2023-07-01

10.1016/j.jappgeo.2023.105070

JOURNAL OF APPLIED GEOPHYSICS   影响因子和分区

0926-9851

1879-1859

Utilizing the surface-wave (Rayleigh-wave) dispersion properties to estimate subsurface S-wave velocity struc-ture has become a popular method due to simple data collection and analysis procedure during the past decades. In particular, the promotion of distributed acoustic sensing (DAS) technique enhances its popularity due to the low-cost of ultra-dense observations. Moreover, under the same exploration requirement, the cost of the DAS data collection is much lower than that of the traditional acquisition implemented by the nodal seismographs. Therefore, it is necessary to expand the DAS application. Here, the multimodal surface-wave dispersion curves are successfully extracted from the phase-weighted stack of cross-correlation functions (CCFs) of the DAS data collected at Garner Valley Downhole Array field site, California by the proposed cylindrical-wave phase-shift. Then, the dispersion curves are inverted by the inversion workflow (expected to avoid the mode-misidentification) proposed by Yan et al. (2022a), consisting of staging strategy and pattern search with embedded Kuhn-Munkres (PSEKM) algorithm. Compared with other inversion schemes, the novel inversion method allows the presence of the observed values without prior mode-order definition in the inversion system, which omits the tedious and risky manual mode identification, and the mode-orders would be predicted dynamically during the inversion. The dispersion fittings for certain survey points indicate that the mode losses and aliasings appear to be widespread for the surface waves recorded on the free-surface. Finally, the S-wave velocity tomogram consistent with the geological materials of survey area is revealed. Our study demonstrates the feasibility of extracting the DAS-derived multimodal dispersion information and consequently obtaining a physical-reasonable subsurface S-wave velocity model.

Surface waves Distributed-acoustic sensing Dispersion inversion Pattern search Kuhn-Munkres algorithm

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[42222407] ; Guangdong Pro-vincial Key Laboratory of Geophysical High-resolution Imaging Tech-nology[2022B1212010002] ; Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology[ZDSYS20190902093007855] ; Shenzhen Science and Technology Pro-gram[KQTD20170810111725321] ; leading talents of Guangdong province program[2016LJ06N652]

Geology ; Mining & Mineral Processing

Geosciences, Multidisciplinary ; Mining & Mineral Processing

WOS:001012721800001

ELSEVIER

20232314195547

Acoustic wave velocity ; Acoustics ; Data acquisition ; Dispersion (waves) ; Shear waves ; Wave propagation

Data Processing and Image Processing:723.2 ; Acoustics, Noise. Sound:751 ; Acoustic Waves:751.1 ; Mechanics:931.1

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Deep Offshore Oil & Gas Explorat, Shenzhen, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Geophys High Resolut Imagin, Shenzhen, Peoples R China
4.Jilin Univ, Coll Geoexplorat Sci & Technol, Changchun, Peoples R China
5.Changan Univ, Sch Geol Engn & Geomat, Xian, Peoples R China
6.Anhui Univ Sci & Technol, Sch Earth & Environm, Huainan, Peoples R China

Yan, Yingwei,Chen, Xiaofei,Li, Jing,et al. Inversion of multimodal dispersion curves from distributed acoustic sensing measurements for subsurface imaging: A field case of Garner Valley, California[J]. JOURNAL OF APPLIED GEOPHYSICS,2023,214.

Yan, Yingwei,Chen, Xiaofei,Li, Jing,Guan, Jianbo,Xi, Chaoqiang,&Liu, Hui.(2023).Inversion of multimodal dispersion curves from distributed acoustic sensing measurements for subsurface imaging: A field case of Garner Valley, California.JOURNAL OF APPLIED GEOPHYSICS,214.

Yan, Yingwei,et al."Inversion of multimodal dispersion curves from distributed acoustic sensing measurements for subsurface imaging: A field case of Garner Valley, California".JOURNAL OF APPLIED GEOPHYSICS 214(2023).