Development of a novel self-entry exploitation device for marine natural gas hydrate and the feasibility studies

被引:8
作者
Wu, Xuezhen [1 ,6 ]
Ye, Hongyu [1 ]
Jiang, Yujing [2 ,4 ]
Li, Dayong [1 ,3 ]
Wang, Gang [4 ,5 ]
机构
[1] Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Peoples R China
[2] Nagasaki Univ, Grad Sch Engn, Nagasaki 8528521, Japan
[3] China Univ Petr, Sch Storage, Transportat & Construction Engn, Qingdao 266590, Peoples R China
[4] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Minist Sci & Technol, Qingdao 266590, Peoples R China
[5] Fujian Univ Technol, Sch Civil Engn, Fuzhou 350108, Peoples R China
[6] Univ Town, Wu Long Jiang Rd 2, Fuzhou 350108, Fujian, Peoples R China
基金
中国国家自然科学基金;
关键词
Marine natural gas hydrate; Self-entry exploitation device; Depressurization method; Torpedo anchor; Penetration laws; Gas production characteristics; METHANE HYDRATE; TORPEDO ANCHOR; SHENHU AREA; DYNAMIC INSTALLATION; NUMERICAL-SIMULATION; OFFSHORE PRODUCTION; BEARING SEDIMENT; NANKAI TROUGH; INSTABILITY; MODEL;
D O I
10.1016/j.oceaneng.2022.111365
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Natural gas hydrate (NGH) is a potentially green energy resource for the future. Five trial production experiments of marine NGH have been carried out worldwide. However, the currently widely used drilling method has poor economic applicability, and there are still many critical technical problems that need to be solved. Based on the characteristics of marine NGH reservoir and the exploration principle, a novel self-entry exploration device (SEED) according to the penetration mechanism of torpedo anchor was proposed, and the working principle was described in detail. The SEED could significantly reduce the cost of NGH exploitation because it eliminates the need for deepwater drilling rigs. Moreover, unlike traditional cement wellbore, the SEED is an artificial rigid structure that withstands greater depressurization to increase efficiency. The penetration laws and gas production characteristics of the SEED were studied through numerical simulation. The research results show that the penetration depth into the seabed can reach more than 300 m, which can cover most of the NGH reservoirs' depth. The gas production efficiency is significantly improved compared to the traditional wellbore. The SEED has specific potential for exploring marine NGH, providing a new idea for commercial exploitation.
引用
收藏
页数:11
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