| 核磁共振T2谱反演影响因素 |
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| 引用本文： | 葛成,郭新军,赵海波,李朋,陈晓雪.核磁共振T2谱反演影响因素[J].物探与化探,2011,35(6):845-847,854. |
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| 作者姓名： | 葛成 郭新军 赵海波 李朋 陈晓雪 |
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| 作者单位： | 中国石油化工股份有限公司东北油气分公司十屋采油厂,吉林长春,130062 |
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| 摘 要： | 为了进一步改进完善核磁共振T2谱反演算法,利用核磁共振正演模拟信号,研究回波间隔、原始回波采集数量、信噪比等因素对反演结果的影响,同时在不同信噪比下对最优化T2谱反演算法、奇异值分解反演算法进行比较分析。研究表明:采集弛豫信号时,回波间隔大小的设置与回波数量、组分大小相匹配,才能得到最佳的反演效果;信噪比越高反演效果越好,当信噪比大于25时反演谱与构造谱基本吻合;在反演不同信噪比理论回波数据时,最优化反演方法对信噪比要求不高,奇异值分解反演方法对信噪比要求高,而奇异值分解反演速度较快。
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| 关 键 词： | 核磁共振 T2谱反演 回波间隔 信噪比 |
FACTORS INFLUENCING SPECTRUM INVERSION FROM NMR DATA |
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| GE Cheng,GUO Xin-jun,ZHAO Hai-bo,LI Peng,CHEN Xiao-xue.FACTORS INFLUENCING SPECTRUM INVERSION FROM NMR DATA[J].Geophysical and Geochemical Exploration,2011,35(6):845-847,854. |
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| Authors: | GE Cheng GUO Xin-jun ZHAO Hai-bo LI Peng CHEN Xiao-xue |
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| Institution: | GE Cheng,GUO Xin-jun,ZHAO Hai-bo,LI Peng,CHEN Xiao-xue(Shiwu Oil Production Factory,Northeast Oil & Gas Branch,Sinopec,Changchun 130062,China) |
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| Abstract: | The T2 spectrum inversion from NMR data has been widely used in petroleum industry both in core analysis for petrophysical studies and in logging interpretation.In order to improve and consummate algorism of inversion,the authors used the NMR numerical simulation data to study the factors influencing T2 spectrum inversion from NMR data,such as the intervals and number of echos,and signal-to-noise ratios.The method of T2 spectrum inversion was compared with optimization algorithm and singular value decomposi... |
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| Keywords: | nuclear magnetic resonance(NMR) T2 spectrum inversion echo intervals signal-to-noise ratio |
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