| 天然气水合物沉积物力学性质的试验研究 |
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| 引用本文： | 张旭辉,王淑云,李清平,赵京,王爱兰.天然气水合物沉积物力学性质的试验研究[J].岩土力学,2010,31(10):3069-3074. |
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| 作者姓名： | 张旭辉 王淑云 李清平 赵京 王爱兰 |
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| 作者单位： | 1. 中国科学院力学研究所,北京,100190
2. 中海石油研究中心,北京,100027 |
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| 基金项目： | 国家岛技术研究发展专项，中科院3期创新方向性项目资助 |
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| 摘 要： | 利用研制的天然气水合物沉积物合成及力学性质一体化试验设备,以粉细砂土作为土骨架,分别对冰沉积物以及对四氢呋喃(THF)、二氧化碳(CO2)和甲烷3种水合物沉积物进行了室内合成和三轴剪切试验,分析和比较了这4种沉积物样品的应力-应变和强度特性,初步探究了冰和不同气体在水合物沉积物强度中所起的作用。试验结果表明:4种沉积物均表现为塑性破坏;围压越大,水合物沉积物强度越高;在水合物含量相同条件下,不同气体水合物会使水合物沉积物的强度不同。
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| 关 键 词： | 水合物 水合物沉积物 一体化试验设备 应力-应变关系 剪切强度 |
Experimental study of mechanical properties of gas hydrate deposits |
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| ZHANG Xu-hui,WANG Shu-yun,LI Qing-ping,ZHAO Jing,WANG Ai-lan.Experimental study of mechanical properties of gas hydrate deposits[J].Rock and Soil Mechanics,2010,31(10):3069-3074. |
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| Authors: | ZHANG Xu-hui WANG Shu-yun LI Qing-ping ZHAO Jing WANG Ai-lan |
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| Institution: | 1.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; 2. Research Centre, China Ocean Oil Co., Beijing 100027, China |
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| Abstract: | With the integrated experiment apparatus of gas hydrate deposit syntheses and triaxial compression test, a series of ice, tetrahydrofuran(THF) hydrate, CO2 hydrate and methane hydrate(MH) in the skeleton of fine silty sand are synthesized; and then shear tests are carried out. The stress-strain and shear strength characteristics of these four kinds of deposits and the effects of gas hydrate and ice on the strength of deposit are analyzed and compared. It is shown that these four deposits behave as plastic failure. The larger the confined pressure is the higher the strength is. The deposits with the same saturation of gas hydrate have different strengths when the kinds of hydrates are different. |
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| Keywords: | hydrate hydrate deposit integrated experiment apparatus stress-strain relationship shear strength |
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