The inversion of NMR log data sets with different measurement errors.
We present a composite-data processing method which simultaneously processes two or more data sets with different measurement errors. We examine the role of the noise level of the data in the singular value decomposition inversion process, the criteria for a proper cutoff, and its effect on the uncertainty of the solution. Examples of processed logs using the composite-data processing method are presented and discussed. The possible usefulness of the apparent T(1)/T(2) ratio extracted from the logs is illustrated.
Dunn
K J
KJ
Chevron Petroleum Technology Company, La Habra, California 90633, USA.
LaTorraca
G A
GA
D000465:Algorithms; D016018:Least-Squares Analysis; D009682:Magnetic Resonance Spectroscopy; D012815:Signal Processing, Computer-Assisted