低场核磁共振在天然气水合物实验研究中的应用  

Application of low field nuclear magnetic resonance in the experimental study of natural gas hydrate

作　　者：赵越超[1] 张钰莹 黄明星 毛晓坤 ZHAO Yuechao;ZHANG Yuying;HUANG Mingxing;MAO Xiaokun(Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海洋能源利用与节能教育部重点实验室,辽宁大连116024

出　　处：《实验室科学》2023年第3期64-68,共5页Laboratory Science

基　　金：国家自然科学基金(项目编号:52076030,51606018);中央高校基本科研业务费(项目编号:DUT19TD29);大连理工大学高等学校本科教育改革与教学质量工程建设项目(项目编号:2016);大连理工大学教学改革基金项目(项目编号:2017,YB2021060)。

摘　　要：天然气水合物作为一种储量巨大的非常规天然气资源,是最具有商业开发前景的清洁能源之一,为了实现水合物的有效开采,需深入研究与天然气水合物开采相关的复杂多孔介质中多相、多组分流体的相变和运移。基于自主研发的高压低温核磁共振天然气水合物实验检测装置,实现了多孔介质内天然气水合物生成相变过程的原位检测,采用先进的纯相位编码多参数核磁共振技术获得甲烷水合物生成相变过程中微观孔隙内所赋存的气、水、水合物多相多组分流(固)分布规律,实现了各相流(固)体含量、空间分布动态过程的定量描述,为研究天然气水合物提供了重要的实验检测方法。As a kind of unconventional natural gas resource with huge reserves,natural gas hydrate is one of the clean energy with the most commercial development prospect.In order to realize the effective exploitation of natural gas hydrate,it is necessary to study the phase transformation and migration law of multiphase and multicomponent fluids in the complex porous media involved in the process of natural gas hydrate exploitation.Based on the self-developed high-pressure and low-temperature NMR natural gas hydrate experimental system,this study realized the in-situ detection of the phase transformation process of methane hydrate generation in porous media.Besides,advanced pure phase coded NMR technology were used to obtained gas,water,hydrate multiphase multicomponent fluid(solid)distribution law during methane hydrate formation phase transition in the microscopic pores.The quantitative description of fluid(solid)content and spatial distribution of each phase has been realized,which provides an important experimental detection method for the study of natural gas hydrate.

关 键 词：核磁共振 多孔介质 多相多组分 相变 

分 类 号：X511[环境科学与工程—环境工程] Q-336[生物学]