祁连山冻土区天然气水合物微观结构特征及其动态聚散规律研究

项目名称： 祁连山冻土区天然气水合物微观结构特征及其动态聚散规律研究

项目编号： No.41302034

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 孟庆国

作者单位： 青岛海洋地质研究所

项目金额： 23万元

中文摘要： 研究祁连山冻土区天然气水合物的微观结构特征及其动态聚散规律，对于祁连山冻土区天然气水合物资源勘探、评价以及开发具有重要意义。本项目拟针对祁连山冻土区天然气水合物，采用理论研究与模拟实验相结合的方法，模拟合成祁连山冻土区天然气水合物样品，并借助固体核磁共振（Solid-state Nuclear Magnetic Resonance, SSNMR）和核磁共振成像（Magnetic Resonance Imaging, MRI）可视化技术，对水合物样品的结构和形成与消亡过程进行测定和直接观测，研究祁连山冻土区天然气水合物的结构类型、客体分子笼型占有率和分布、水合指数等微观结构特征，探索祁连山冻土区岩心中天然气水合物形成与消亡动态过程的基本特征，考察温度压力条件对水合物微观结构特征及其动态聚集与消亡过程的影响规律，为祁连山冻土区天然气水合物的开发利用提供有力支持。

中文关键词： 多组分气体水合物；结构特征；动态聚散；固体核磁共振；X射线CT

英文摘要： It is highly significant for the exploration, evaluation and exploitation of gas hydrates in Qilian Mountain permafrost area to study on the gas hydrates microstructure and dynamic accumulation and dispersion. In this study, the natural gas hydrates from Qilian Mountain permafrost regions will be copied. Combined the theory research with simulation experiments, the microstructure characteristics (including structure types, guest molecules distributions, cage occupancy ratios and hydration numbers ) of the copied gas hydrates area will be determined by solid-state Nuclear Magnetic Resonance (SSNMR), and their dynamic accumulation and dispersion process in the cores will be also studied by in situ Magnetic Resonance Imaging (MRI). Simultaneously, the influences of the temperature and pressure conditions on the hydrates microstructure characteristics and formation and dispersion process will also be investigated. This study will be certain to provide effective supports for the research and exploitation of the Qilian Mountain natural gas hydrates.

英文关键词： multi-component gas hydrate；structure characteristic；dynamic accumulation and dispersion；Solid-state Nuclear Magnetic Resonance；X-ray Computed Tomography