Efficient processing of NMR echo trains

Details Efficient processing of NMR echo trains Efficient processing of NMR echo trains

1993-12-16

1996-05-14

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using well logging device

324307, G01R 3320

Patent

active

055171150

ABSTRACT:
A method and apparatus is disclosed for efficient processing of nuclear magnetic resonance (NMR) echo trains in well logging. Apriori information about the nature of the expected signals is used to obtain an approximation of the signal using a set of pre-selected basis functions. A singular value decomposition (SVD) is applied to a matrix incorporating information about the basis functions, and is stored off-line in a memory. During the actual measurement, the apparatus estimates a parameter related to the SNR of the received NMR echo trains and uses it to determine a signal approximation model in conjunction with the SVD of the basis function matrix. This approximation is used to determine in real time attributes of the earth formation being investigated.

REFERENCES:
patent: 4717877 (1988-01-01), Taicher et al.
patent: 4980640 (1990-12-01), Van Ormondt et al.
patent: 5023551 (1991-06-01), Kleinberg et al.
patent: 5218299 (1993-06-01), Dunkel
patent: 5302896 (1994-04-01), Dechene et al.
patent: 5363041 (1994-11-01), Sezginer
patent: 5367260 (1994-11-01), Dechene et al.

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