水力喷射微小井眼技术用于海洋水合物钻探的可行性探讨
投稿时间:2019-12-20  修订日期:2019-12-20  点此下载全文
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作者单位E-mail
王志刚 中国地质科学院勘探技术研究所河北 廊坊 1036821833@qq.com 
胡志兴 河北省煤田地质局第二地质队  
李小洋 中国地质科学院勘探技术研究所河北 廊坊  
伍晓龙 中国地质科学院勘探技术研究所河北 廊坊  
董新柱 中国地质科学院勘探技术研究所河北 廊坊  
史二铃 中国地质科学院勘探技术研究所河北 廊坊  
尹浩 中国地质科学院勘探技术研究所河北 廊坊  
梁健 中国地质科学院勘探技术研究所河北 廊坊  
刘秀美 中国地质科学院勘探技术研究所河北 廊坊  
基金项目:天然气水合物勘查开发技术联合研究(项目编号:SQ2018YFE20424)。
中文摘要:在“后石油时代”,天然气水合物成为最佳的开采能源,具有储量丰富、清洁高效的特点,世界各国非常重视天然气水合物资源的调查和开采工作,而我国在2017年顺利实施了海洋天然气水合物直井试采工作,并取得了丰硕的成果。水力喷射微小井眼技术是一项正在兴起的新型钻探技术,已经在石油钻探中得到了一定的应用,将其应用到海洋天然气水合物钻探中具有钻井成本低、可顺利完成水平段钻进、降低井眼轨迹控制难度、储层污染小,降低了大规模海底坍塌的风险的优势,但是还存在着水平段长度、井壁稳定、卡钻事故处理、钻井工具开发、连续油管寿命短等关键技术问题需要解决,同时通过喷射发泡水泥在水合物储层形成蜂窝状物质达到改造储层的目的,也是一种行之有效的储层改造方法。
中文关键词:水力喷射  微小井眼  水合物  钻探  发泡水泥
 
Feasibility Study of Hydraulic Jet Micro-borehole Technology in Marine Hydrate Drilling
Abstract:In the post-petroleum era, natural gas hydrate has become the best energy source for exploitation. It has the characteristics of abundant reserves, cleanliness and high efficiency. Countries all over the world attach great importance to the investigation and exploitation of natural gas hydrate resources. In 2017, China successfully implemented the vertical well production test of marine natural gas hydrate, and achieved fruitful results. The water jet micro-wellbore technology is a new drilling technology that has been developed and applied in oil drilling, applying it to marine natural gas hydrate drilling has the advantages of low drilling cost, smooth completion of horizontal section drilling, difficulty in controlling well trajectory control, small reservoir pollution, and reduced risk of large-scale seabed collapse, however, there are still key technical issues such as the length of the horizontal section, the stability of the borehole, the handling of stuck drills, the development of drilling tools, and the short life of coiled tubing, but also achieves the goal of reservoir reconstruction by injecting foamed cement into hydrate reservoir to form honeycomb-like substance, it is an effective method of reservoir reconstruction.
keywords:hydraulic injection  micro-wellbore  hydrate  drilling  Reservoir modification
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