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首页» 过刊浏览» 2022» Vol.7» Issue(3) 382-393     DOI : 10.3969/j.issn.2096-1693.2022.03.033
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径向井降压开采天然气水合物实验研究
张潘潘,张逸群,王玮,王天宇,穆总结,田守嶒
1 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249 2 中国石油大学(北京)克拉玛依校区石油学院,克拉玛依 834000
ZHANG Panpan, ZHANG Yiqun, WANG Wei, WANG Tianyu, MU Zongjie, TIAN Shouceng
ZHANG Panpan, ZHANG Yiqun, WANG Wei, WANG Tianyu, MU Zongjie, TIAN Shouceng
1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing, Beijing 102249, China 2 College of Petroleum, China University of Petroleum-Beijing at Karamay, Karamay 834000, China

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摘要  设计一套径向井开采水合物模拟实验装置,针对富气相环境下和富水 相环境下的含水合物沉积物降压开采开展研究,分析了径向井降压水 合物的产能特征。
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关键词 : 天然气水合物;径向井;降压开采;实验研究;神狐海域
Abstract

Natural gas hydrate is a potential alternative energy source for the future, and the low mining efficiency severely restricts its commercial utilization. The technology of radial wells is a newly proposed method for increasing the productivity of natural gas hydrates. To evaluate the effectiveness of this method, experimental studies were carried out to simulate the extraction of hydrate sediments in water-rich and gas-rich environments by vertical well depressurization and radial well depressurization. Results indicate that: for the extraction of gas-rich hydrate samples by depressurization, gas production behavior of vertical well and radial well is almost the same; for the small experimental scale and relatively high permeability of samples the pressure propagation patterns are similar when vertical wells and radial wells are applied. For the extraction of water-rich hydrate samples by depressurization: compared with that of vertical wells, the cumulative gas production and cumulative water production of radial wells at the end of the production cycle were increased by 20.16% and 38.98%, respectively; as a high conductivity channel, the radial well can increase the drainage area in the hydrate sediments and promote the propagation of pressure drop to the inside of the reactor, and ultimately accelerating the decomposition rate of hydrate; besides, the temperature drop is more significant when the radial well is used, which provides more sensible heat for the decomposition of hydrates and further improves the efficiency of hydrate production.

Key words: natural gas hydrate; radial well; depressurization; experimental study; Shenhu area
收稿日期: 2022-09-29     
PACS:    
基金资助:国家重点研发计划项目课题子课题(2019YFC0312301-2)、国家自然科学基金国际( 地区) 合作与交流项目(41961144026)、国家自然科学基
金青年基金(51804320)、国家自然科学基金重大项目课题(51991362) 和国家自然科学基金重大科研仪器研制项目(51827804) 联合资助
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10.3969/j.issn.2096-1693.2022.03.033
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