Seafloor Deformation Monitoring Based on Tiltmeters for Natural Gas Hydrate Production

被引：0
|
作者：
Zhang X. [1 ]
Zhang H. [2 ]
Zhou L. [3 ]
He T. [4 ]
Liang Q. [5 ]
Dong Y. [5 ]
He C. [1 ]
机构：
[1] Institute of Oil and Gas, School of Earth and Space Sciences, Peking University, Beijing
[2] School of Geoscience, University of Calgary, Calgary
[3] Offshore Oil Engineering Co. LTD, Tianjin
[4] Laboratory of Orogenic Belts and Crustal Evolution (MOE), Peking University, Beijing
[5] Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou
来源：
Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2019年 / 55卷 / 04期
关键词：
Natural gas hydrate; Seafloor deformation monitoring; Simulated annealing; Tilt field; Tiltmeter;
D O I：
10.13209/j.0479-8023.2019.054
中图分类号：
学科分类号：
摘要：
We present and establish a seafloor deformation model for gas hydrate exploitation in the sea area based on Okada's linear elasticity theory. The seafloor deformation field is simulated by using high precision tiltmeters, and the model parameters are inverted by simulated annealing method. The results show that the accurate information of dip, azimuth and volume of hydrate dissociated zone can be obtained by tiltmeters. The test results at different noise levels show that the model parameter inversion method has good anti-noise performance. In addition, the feasibility of tiltmeter monitoring in practical application is analyzed according to the hydrate exploitation test in Shenhu area of South China Sea in 2017, and the results show that the type of decline in production has advantages in seabed stability. © 2019 Peking University.
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页码：635 / 642
页数：7
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