岩石样品表面流体的核磁共振谱线

波谱学杂志 ›› 1995, Vol. 12 ›› Issue (6): 657-661.

岩石样品表面流体的核磁共振谱线

肖立志, 杜有如, 叶朝辉

中国科学院武汉物理研究所波谱与原子分子物理国家重点实验室, 武汉 430071

收稿日期:1995-02-27 修回日期:1995-04-18 出版日期:1995-12-05 发布日期:2018-01-17
基金资助:
国家自然科学基金

NMR LINES OF FLUIDS ON THE ROCK CORE SURFACE

Xiao Lizhi, Du Youru, Ye Chaohui

State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, The chinese Academy of Sciences, Wuhan 430071

Received:1995-02-27 Revised:1995-04-18 Online:1995-12-05 Published:2018-01-17

摘要/Abstract

摘要： 已经知道,磁化率对核磁共振(NMR)化学位移的测量有明显影响^[1,2],而且,磁化率效应与样品管的形状及取向(即与静磁场的夹角)等因素有关^[3-7].为了测准样品的化学位移,有多种方法可以消除磁化率的影响。样品形状引起的非均匀磁化会限制核磁共振成像的空间分辨率^[8,9].近来又发展了克服磁化率影响的非畸变成像方法^[10].但是,磁化率引起的多孔固体样品孔隙中和外壁上流体的核磁共振诸线的差异却尚未看到文献报道。本文首次报道岩石样品核磁共振实验中观测到的岩样外表流体产生的谱线,初步讨论了它们与岩石渗流性质的关系。

关键词: 岩石样品, 核磁共振谱线, 渗透性

Abstract: NMR lines of fluids on the rock core surface are found.Analysis indicated that they originate from the diffcrence in susceptibilities between rock matrix and free fluid.When some of the fluids leaked out from the rock pores,the fluids exit in two states,i.e.inside the rock and outside the rock,their susceptibilities are different,The intensity of the new resonance lines increases with time and tends to a constant value,this procedure is rclated to the permeability of the sampie.So it is possible to develop a method to deteimine rock pemeability from the surface fluid lines.

Key words: Rock sample, NMR spectrum, Permeabilty

肖立志, 杜有如, 叶朝辉. 岩石样品表面流体的核磁共振谱线[J]. 波谱学杂志, 1995, 12(6): 657-661.

Xiao Lizhi, Du Youru, Ye Chaohui. NMR LINES OF FLUIDS ON THE ROCK CORE SURFACE[J]. Chinese Journal of Magnetic Resonance, 1995, 12(6): 657-661.