| 岩石的核磁共振弛豫时间加权微成像 |
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| 引用本文： | 肖立志,杜有如,叶朝辉.岩石的核磁共振弛豫时间加权微成像[J].物理化学学报,1994,10(6):484-488. |
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| 作者姓名： | 肖立志 杜有如 叶朝辉 |
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| 作者单位： | Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, Chinese Academy of Sciences, Wuhan 430071 |
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| 摘 要： | 根据自旋回波成像脉冲序列中像点信号强度与重复时间TR及回波时间TE的关系，结合岩石孔隙流体核磁共振她豫的多指数特性，利用T1加权和T2加权微成像提取岩样扎隙结构的信息，以此区分大孔和微孔．1实验方法自旋回波单片核磁共振成像脉冲序列如图1所示问．图中，GX为X方向的梯度场，用于信号的频率编码，实现X方向的空间定位；GY为Y方向的梯度场，用于信号的相位编码，实现Y方向的空间定位；GZ为Z方向的梯度场，结合形状脉冲，用于确定选片的位置及片厚，实现Z方向的空间定位．RF是射频脉冲发射通道，由90°宽带脉冲和180℃窄带形状…
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| 关 键 词： | NMR微成像 T1加权像 T2加权像 双指数弛豫 岩石样品 |
| 收稿时间： | 1994-03-02 |
| 修稿时间： | 1994-04-15 |
NMR Relaxation Time Weighted Micro-imaging Method for Rock Samples |
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| Xiao Lizhi,Du Youru,Ye Chaohui.NMR Relaxation Time Weighted Micro-imaging Method for Rock Samples[J].Acta Physico-Chimica Sinica,1994,10(6):484-488. |
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| Authors: | Xiao Lizhi Du Youru Ye Chaohui |
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| Institution: | Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, Chinese Academy of Sciences, Wuhan 430071 |
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| Abstract: | According to the relations of pixel signal intensity with the repetition time TR and echo time TE in spin-echo single slice imaging pulse sequence, by combining the multi-exponential relaxation procedure of fluids saturated in porous media, tlle information about pore structure of the tested rock is obtained with T1- and T2-weighted microimagings. The macro- and micro-pore regions can be distinguished with the information. |
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| Keywords: | NMR microscopy T_1-weighted image T_2- weighted image Biexponential relaxation Rock sample |
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