[1]陈华,潘克家,谭永基,等.核磁共振弛豫信号多指数反演新方法[J].测井技术,2009,33(01):37-41.
 CHEN Hua,PAN Ke-jia,TAN Yong-ji.A New Method for Multi-exponential Inversion of NMR Relaxation Signal[J].WELL LOGGING TECHNOLOGY,2009,33(01):37-41.
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核磁共振弛豫信号多指数反演新方法()
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《测井技术》[ISSN:1004-1338/CN:61-1223/TE]

卷:
第33卷
期数:
2009年01期
页码:
37-41
栏目:
方法研究
出版日期:
2009-02-26

文章信息/Info

Title:
A New Method for Multi-exponential Inversion of NMR Relaxation Signal
作者:
陈华;潘克家;谭永基;
中国石油大学;复旦大学数学科学学院;
Author(s):
CHEN Hua1PAN Ke-jia2TAN Yong-ji2
1.China University of Petroleum,Dongying,Shandong 257061,China;2.School of Mathematical Sciences,Fudan University,Shanghai 200433,China
关键词:
核磁共振多指数反演非负最小二乘非线性优化弛豫信号差分进化算法
分类号:
P631.84
摘要:
孔隙介质核磁共振(NMR)弛豫信号的多指数反演在NMR岩心分析与测井解释中起着关键作用。通过将核磁共振弛豫信号多指数反演问题转化为一个带非负约束的非线性优化问题,先用非负最小二乘方法(NNLS)确定弛豫时间组分数,然后由差分进化(DE)算法求解优化问题。新方法计算非常简单,不依赖于初值,而且容易实现非负约束。计算机模拟和实际数据反演结果表明,该方法对核磁共振弛豫信号分析非常有效,尤其是在信噪比较低的情况下,仍能保证弛豫谱的真实性。

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更新日期/Last Update: 2009-02-26