摘要
饱和流体孔隙介质中存在的内部磁场梯度会对孔隙介质的核磁共振产生显著影响,提出了一种基于(T2int,D)二维核磁共振方法计算饱和多相流体孔隙介质内部磁场梯度的方法,可以计算饱和水以及油水多相流体的孔隙介质中内部磁场梯度.数值模拟与实验测量表明,该方法计算的饱和流体孔隙介质内部磁场梯度是有效的.
In porous media, magnetic susceptibility contrast between the solid matrix and fluid filling the pore space leads to internal magnetic field gradients which have a big effect on nuclear magnetic resonance (NMR) diffusion relaxation of fluid. In this paper, we propose a new method which based on 2D NMR (T2int, D) method to calculate the internal magnetic field gradient in porous media for both water saturated and multi-phase fluids saturated. Numerical simulation and NMR experiments show that this method works well.
出处
《中国科学:物理学、力学、天文学》
CSCD
北大核心
2012年第8期827-834,共8页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金资助项目(批准号:41130417)
关键词
多相流体
孔隙介质
二维核磁共振
内部磁场梯度
multi-phase fluids, porous media, 2D NMR, internal magnetic field gradient