METHOD FOR THE INVERSION OF CPMG MEASUREMENTS ENHANCED BY OFTEN REPEATED SHORT WAIT TIME MEASUREMENTS

A method for determining an earth formation property from nuclear magnet ic resonance measurements includes applying suppression functions to spin echoe s in at least one burst measurement set to produce a modified burst data set, the suppression functions to suppress contribution of spin echoes hav...

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Bibliographic Details
Main Author HEIDLER, RALF
Format Patent
LanguageEnglish
French
Published 16.11.2003
Edition7
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:A method for determining an earth formation property from nuclear magnet ic resonance measurements includes applying suppression functions to spin echoe s in at least one burst measurement set to produce a modified burst data set, the suppression functions to suppress contribution of spin echoes having non-negligible polarization correction; inverting the modified burst data set and at least one standard spin echo measurement set to produce a nuclear magnetic resonance parameter distribution, the at least one standard spin echo measurement set and the at least one burst measurement set being acquired on an earth formation sample; and computing the earth formation property from the nuclea r magnetic resonance parameter distribution. The nuclear magnetic resonance parameter includes at least one selected from longitudinal relaxation time, transverse relaxation time, a ratio of longitudinal relaxation time to transverse relaxation time, and diffusion constant.
Bibliography:Application Number: CA20032427420