| 海底孔内水合物观测系统与钻井实施 |
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| 引用本文： | 宁伏龙,蒋国盛,吴翔,窦斌,张凌.海底孔内水合物观测系统与钻井实施[J].海洋地质译丛,2008(4):31-35. |
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| 作者姓名： | 宁伏龙 蒋国盛 吴翔 窦斌 张凌 |
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| 作者单位： | 中国地质大学（武汉）工程学院,湖北武汉430074 |
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| 基金项目： | 国家自然科学基金（50704028）,“863计划”（2006AA09Z316）、教育部博士点基金（20070491017）和中国地质大学（武汉）优秀青年教师资助计划资助项目（CUGQNL0623,CUGQNL0725）共同资助. |
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| 摘 要： | 通过耦合布设海底表面和孔内水合物观测系统获取物理、化学、微生物等数据是了解掌握海洋水合物环境动态变化、碳循环规律和资源开发技术的有效手段,据此初步提出了一套海底孔内水合物观测系统,并指出了系统的关键技术难点。而在钻井布设该孔内观测系统时,要注意防止井内安全事故的发生,充分评估安放位置处含水合物地层的地质力学稳定性并采取适当的钻井和完井方式稳定或强化含水合物地层以支撑孔内观察仪器,实现孔内长期监测。最后讨论了在我国南海实施孔内水合物观测系统的必要性,并提出了初步想法。
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| 关 键 词： | 天然气水合物 海底 钻井 钻孔 观测系统 |
Seafloor gas hydrates monitoring system and drilling deployment |
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| Authors: | Ning Fulong Jiang Guosheng Wu Xiang Dou Bin Zhang Ling |
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| Institution: | ( Faculty of Engineering, China University of Geosciences, Wuhan 430074) |
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| Abstract: | The global climate, oceanographic and tectonic processes can affect the stability of gas hydrate, resulting in highly dynamic changes of seafloor environments. A coupled seafloor/borehole observatory system can be used to monitor the chemical, microbiological and physical data to achieve a better understanding of these changes, the carbon cycling and resource exploitation in gas hydrate-bearing continental margin. A borehole monitoring system for marine gas hydrates was designed conceptually and discussed about its relatively key problems in its development. While drilling and deploying the borehole instrumentations, borehole safety should be considered and geomechanical stability of hydrate-bearing formations should be assessed whether it can support the borehole instrumentations. Some drilling and completion methods will be taken to reinforce and stabilize the weak and friable hydrate-bearing formations, which can realize a long-term observation. Finally, some suggestions were proposed and discussed for carrying out the borehole hydrate observatory system in the South China Sea in the future. |
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| Keywords: | gas hydrate drilling borehole monitoring system |
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