Processing of parametric array sub-bottom profiles and the application in identifying shallow gas hydrates

CHEN Shanshan; YANG Rui; LIU Xinxin; YANG Jiajia; LIU Hong; YAN Zhonghui; WANG Xiaojie; XU Huaning; ZHAO Weina

doi:10.16028/j.1009-2722.2022.316

2023 Vol. 39, No. 10

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Article navigation > Marine Geology Frontiers > 2023 > 39(10): 77-84

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CHEN Shanshan, YANG Rui, LIU Xinxin, YANG Jiajia, LIU Hong, YAN Zhonghui, WANG Xiaojie, XU Huaning, ZHAO Weina. Processing of parametric array sub-bottom profiles and the application in identifying shallow gas hydrates[J]. Marine Geology Frontiers, 2023, 39(10): 77-84. doi: 10.16028/j.1009-2722.2022.316

Citation:

CHEN Shanshan, YANG Rui, LIU Xinxin, YANG Jiajia, LIU Hong, YAN Zhonghui, WANG Xiaojie, XU Huaning, ZHAO Weina. Processing of parametric array sub-bottom profiles and the application in identifying shallow gas hydrates[J]. Marine Geology Frontiers, 2023, 39(10): 77-84. doi: 10.16028/j.1009-2722.2022.316

Processing of parametric array sub-bottom profiles and the application in identifying shallow gas hydrates

1.
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266237, China
2.
Laboratory for Marine Mineral Resources, Laoshan Laboratory, Qingdao 266237, China
3.
Qingdao Research Institute, Northwestern Polytechnical University, Xi'an 710072, China

More Information

Corresponding author: YANG Rui, yangr@mail.cgs.gov.cn

Received Date: 28 November 2022

Publish Date: 28 October 2023

Abstract

Abstract

Parametric array sub-bottom profile detection technology has been rapidly developed recently into an effective method for shallow gas hydrate detection due to its simple acquisition mode and high-resolution shallow strata imaging capability. To better obtain geological information on the shallow gas hydrate in the East China Sea, we performed a detailed processing of the parameter array sub-bottom profile. First, the methods of abnormal amplitude suppression and spatial amplitude equalization were combined to solve the problems of noise and energy imbalance. Then, the Hilbert transform was used to improve the stratigraphic resolution. Finally, signal enhancement technology was used to improve the continuity of the events and the resolution of wave group characteristics. The processed parameter array sub-bottom profile features high signal-to-noise ratio, good continuity, and clear stratigraphic structure, which can better reveal seismic reflection characteristics such as blank zones, gas chimneys, bright spots, and anomalies like flame, which lays the foundation for identifying shallow gas hydrate. Furthermore, seismic attributes (curvature attribute, instantaneous amplitude attribute, coherence attribute) were analyzed and result show that acoustic anomalies related to shallow gas hydrate leakage could be clearly identified. The study not only verified the feasibility of the parametric array sub-bottom profile processing method for shallow gas hydrate, but also explored the application of attribute analysis technology in the identification of shallow gas hydrate.
- parametric array sub-bottom profile /
- Hilbert transform /
- seismic reflection characteristics /
- seismic attributes /
- shallow gas hydrates

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References

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