Marine natural gas hydrate self-entry exploitation device and its feasibility

被引：0
|
作者：
Wu X. [1 ]
Ye H. [1 ]
Jiang Y. [2 ]
Li D. [3 ]
Jiang J. [1 ]
Wang G. [4 ]
Gong B. [4 ]
机构：
[1] College of Civil Engineering, Fuzhou University, Fuzhou
[2] Graduate School of Engineering, Nagasaki University, Nagasaki
[3] College of Pipeline and Civil Engineering, China University of Petroleum(East China), Qingdao
[4] State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2022年 / 53卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Characteristic of product gas; Law of penetration; Marine natural gas hydrate; Self-entry exploitation device;
D O I：
10.11817/j.issn.1672-7207.2022.03.022
中图分类号：
学科分类号：
摘要：
In order to solve the problems of the high cost of deep-sea operation, easy damage to the wellbore structure and difficulty in long-term stable exploitation in the current marine natural gas hydrate trial cases, a novel marine natural gas hydrate self-entry exploitation device and method were proposed. The method does not require the use of large drilling equipment, and the new device carries the relevant devices into the reservoir by gravity impact and then performs depressurization exploitation, which can be reused after the operation. An impact penetration model and a depressurization exploration model were established to study the law of the new device penetrating into the seabed reservoir and the gas production characteristics during the production process. The results show that: 1) the depth penetration of the new device into the seabed increases with the increase of its length and diameter, up to a maximum of 370 m, which can cover the burial depth of most natural gas hydrate reservoirs; 2) the new device is composed of a prefabricated steel structure, which can achieve a greater pressure reduction, and the gas production efficiency is promoted by 6 to 14 times compared with the traditional wellbore method. © 2022, Central South University Press. All right reserved.
引用
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页码：1012 / 1022
页数：10
相关论文
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