Method for eliminating effects of acoustic excitations in NMR data

The invention is a method of reducing the effects of non-formation signais in an NMR Jogging echo signal obtained within a borehole in an earth formation. The method obtains a non-formation signal by the application of at least an excitation pulse, and preferably also at least one refocusing pulse....

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Bibliographic Details
Main Authors DAVID R BEARD, ARCADY REIDERMAN, ZINOVY B KRUGLIAK
Format Patent
LanguageEnglish
Published 22.03.2006
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention is a method of reducing the effects of non-formation signais in an NMR Jogging echo signal obtained within a borehole in an earth formation. The method obtains a non-formation signal by the application of at least an excitation pulse, and preferably also at least one refocusing pulse. Said obtained signal is used to numerically construct a synthetic ringing signal sequence. The constructed signal can then be subtracted from an NMR echo signal to reduce the effects of ringing.
Bibliography:Application Number: GB20050024202