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

作　　者：孙中明[1,2] 张剑[2,3] 刘昌岭[2,3] 赵仕俊[4] 业渝光[2,3] 

机构地区：[1]中国石油大学(华东)信息与控制工程学院,青岛266580 [2]国土资源部天然气水合物重点实验室,青岛266071 [3]青岛海洋地质研究所,青岛266071 [4]中国石油大学(华东)石油仪器仪表研究所,东营257061

出　　处：《实验力学》2013年第6期747-754,共8页Journal of Experimental Mechanics

基　　金：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)

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。Methane hydrate was （Time Domain Reflectometry） t saturation during hydrate f calculation shows that TDR orma synthesized on a self-developed experimental apparatus and TDR echnique was applied to real-time monitor the change of hydrate tion. Comparison between TDR measurement and pressure-drop measurement is simple, easy to opera undrained triaxial compression tests Results indicate that the shear strength hydrate saturation, and the cohesion ere carried out for sedi the increase creases with te and reliable. Then, a series of rots containing methane hydrate. of effective confining pressure and 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.

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 

分 类 号：TU411.3[建筑科学—岩土工程]