吴学震,叶鸿宇,李大勇,蒋宇静,王渠.海域天然气水合物吸力筒式开采装置及方法[J].海洋工程,2022,40(6):1~10
海域天然气水合物吸力筒式开采装置及方法
A novel suction cylinder-type exploitation device and approach for marine natural gas hydrate
投稿时间:2021-12-31  
DOI:10.16483/j.issn.1005-9865.2022.06.001
中文关键词:  海域天然气水合物  吸力锚  吸力筒式开采装置  贯入原理  开采特性
英文关键词:marine natural gas hydrate  suction anchor  suction cylinder-type exploitation device  penetration principle  exploration characteristics
基金项目:国家自然科学基金资助项目(41907251,52179098);福建省自然科学基金资助项目(2019J05030,2019J01236);山东省自然科学基金资助项目(ZR2019ZD14)
作者单位
吴学震 福州大学 土木工程学院, 福建 福州 350116 
叶鸿宇 福州大学 土木工程学院, 福建 福州 350116 
李大勇 中国石油大学(华东) 储运与建筑工程学院, 山东 青岛 266580 
蒋宇静 日本长崎大学 工学研究科, 日本 长崎 852-8521
山东科技大学 矿山灾害预防控制国家重点实验室(培育), 山东 青岛 266590 
王渠 福州大学 土木工程学院, 福建 福州 350116 
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中文摘要:
      天然气水合物具有很高的资源价值,众多国家正在开展相关研究与勘探,试采设备和技术取得了一定的发展,但离商业化开采还有很多关键技术问题需要解决。提出一种新型海域天然气水合物开采装置——吸力筒式开采装置及方法,主要包括开采筒、沉贯水泵和气液举升系统等,其整体由钢结构组合而成,依靠吸力和重力作用进入储层,然后进行降压开采,待作业结束后可回收重复使用。参照我国南海神狐海域地质,从理论上分析了新装置两个不同形态的贯入原理,并通过CMG STARS模拟研究新型开采方法的产能提升情况,由于吸力筒式开采装置能实现更大降压幅度并且扩大水合物分解面积,故产气效率相对于传统方法提高约2.46~11.69倍。吸力筒式开采装置具有结构强度高、开采半径大和施工简便等特点,有望做到“提产降本”,为实现海域天然气水合物商业化开采提供一条新思路。
英文摘要:
      Natural gas hydrate has a high resource value. Relevant research and exploitation are being carried out all over the world. Test exploitation equipment and technology have progressed considerably, but many critical technical issues still need to be resolved before commercial production. A novel type of marine natural gas hydrate exploitation device—suction cylinder-type exploitation device (SCED) is proposed. The SCED includes an exploitation cylinder capable of sinking into a stratum below a seabed, a water pump, and a gas-liquid lifting system. The device, composed of a steel structure, relies on suction and gravity to enter the reservoir and then perform decompression exploitation similar to the conventional wellbore, and it can be recycled and reused after the end of the operation. Two different forms of the new device are analyzed for the penetration principle. Moreover, according to the geology of the South China Sea, the penetration principle of the new device in two different forms is analyzed theoretically, and the productivity improvement of the new method is studied through the numerical simulation of CMG STARS. Since the device can expand the hydrate decomposition areas and achieve a greater pressure reduction range, the gas production efficiency is significantly improved by about 2.46~11.69 times compared to traditional methods. The new device has the characteristics of solid structure, large exploitation radius and easy construction, and is expected to achieve "increasing production and reducing costs" for the future commercial exploitation of marine natural gas hydrates.
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