羌塘盆地冻土层结构核磁共振信号响应研究与实践  

The Research and Practice of NMR Signals in Frozen Soil Layer Structure at Qiangtang Basin

作　　者：彭耀[1] 李振宇[1] 郑宗槟 潘剑伟[1] 刘浩[2] 

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,武汉430074 [2]山东电力工程咨询院有限公司,济南250013

出　　处：《CT理论与应用研究（中英文）》2015年第1期37-46,共10页Computerized Tomography Theory and Applications

基　　金：天然气水合物勘查与试采专项(GZHL20110304;GZHL20110324)

摘　　要：为了了解羌塘盆地冻土层的结构,利用核磁共振测深(MRS)技术对羌塘盆地的两个研究区进行了野外勘探。结合室内实验及野外实际资料,冻土层基本无法引起仪器核磁共振响应是划分冻土层和探测水合物的重要证据。在钻井附近进行的MRS方法对试验点进行测量并采集到了NMR信号,分析认为是天然气水合物处在亚稳定状态,分解产生水或者液态烃,形成水-水合物-气三相共存的情况,引起了NMR反应。实践表明可以将MRS方法运用于探测陆域冻土带分布以及冻土带,该方法对于冻土层的结构划分具有十分重要的科学意义和应用价值。In order to understand the frozen soil layer structure at Qiangtang basin, the practice of MRS has been carried out in two study area of Qiangtang basin. Combined laboratory tests and actual field data, permafrost basis cannot cause the instrument response, which is one of the important evidence in dividing permafrost and detecting hydrate. Near the drilling sites, acquisition by NMR signal, analysis considered natural gas hydrate in the steady state, decomposition of produced water or liquid hydrocarbon, formed the coexistence of water-gas hydrate-three-phase situation, caused the NMR reaction. Practice indicates that MRS method can be used to detect distribution of the permafrost and tundra, which has a very important scientific significance and application value.

关 键 词：核磁共振测深 羌塘盆地 冻土层 

分 类 号：P642.14[天文地球—工程地质学]