Cif2000平台下的核磁共振测井解谱方法研究

On the Method of Analyzing and Processing T_2 Relaxation Spectra From NMR Log Data and Relative Program Design on Cif2000 Platform.

介绍了在Cif2 0 0 0多井解释平台下的核磁共振解谱方法与编程实现。解谱采用加入平滑因子后在特征矩阵的奇异值分解中截去小的非零奇异值的方法 ,可以在低信噪比时得到稳定的弛豫谱 ,在油田实际应用中证明了该方法的有效性。根据该方法在Cif2 0 0 0平台上编制了完整的解谱处理程序 。

This paper introduces a method which transforms Nuclear Magnetic Resonance (NMR) log data into T 2 relaxation spectra and a program designed using this method on Cif2000--a multi-well interpretation software platform. In this method, after adding the smoothing factor, the lower non-zero singular values will be cut off in singular value decomposition of the model matrix in order to obtain steady relaxation spectra from low signal-to-noise ratio log data. This method has been proved correct and effective by some oilfield examples. The integrated program designed on the base of it on Cif2000 can be used directly for data processing in the oilfield.