| 孙中明,张剑,刘昌岭*,赵仕俊,业渝光.沉积物中甲烷水合物饱和度测定及其力学特性研究[J].实验力学,2013,28(6):747~754 |
| 沉积物中甲烷水合物饱和度测定及其力学特性研究 |
| On the Determination of Methane Hydrate Saturation and Mechanical Properties of Sediments Containing Methane Hydrate |
| 投稿时间：2012-12-31 修订日期：2013-05-07 |
| DOI：10.7520/1001-4888-12-196 |
| 中文关键词: 时域反射技术 压力降 甲烷水合物饱和度 不排水三轴压缩实验 抗剪强度 关系模型 |
| 英文关键词:Time domain reflectometry (TDR) pressure drop methane hydrate saturation undrained triaxial compression test shear strength relational model |
| 基金项目:国家自然科学基金(41072037),国土资源部海洋油气资源与环境地质重点实验室基金(MRE201124) |
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| 中文摘要: |
| 在自主研制的实验装置上合成甲烷水合物,采用时域反射技术(TDR)实时监测甲烷水合物生成过程中饱和度的变化,并与系统的压力降法计算的饱和度进行了对比。结果表明TDR法简单易行,结果可靠。对含甲烷水合物沉积物进行了一系列不排水三轴压缩实验,结果表明,含甲烷水合物沉积物的抗剪强度随着有效围压的增加和水合物饱和度的增加而增大;粘聚力随着甲烷水合物饱和度的增加而明显增加,但内摩擦角变化并不显著。在此基础上,提出了抗剪强度与有效围压和水合物饱和度的关系模型。 |
| 英文摘要: |
| Methane hydrate was synthesized on a self-developed experimental apparatus and TDR (Time Domain Reflectometry) technique was applied to real-time monitor the change of hydrate saturation during hydrate formation. Comparison between TDR measurement and pressure-drop calculation shows that TDR measurement is simple, easy to operate and reliable. Then, a series of undrained triaxial compression tests were carried out for sediments containing methane hydrate. Results indicate that the shear strength increases with the increase of effective confining pressure and hydrate saturation, and the cohesion significantly increases with the increase of methane hydrate saturation, but the internal friction angle is not sensitive to hydrate saturation. Based on above results, a model relating shear strength with hydrate saturation and effective confining pressure is presented. |
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