G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/14 (2006.01) G01R 33/44 (2006.01) G01R 33/50 (2006.01) G01V 3/32 (2006.01) G01V 3/38 (2006.01) G01V 3/40 (2006.01)
Patent
CA 2427420
A method for determining an earth formation property from nuclear magnetic resonance measurements includes applying suppression functions to spin echoes 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 nuclear 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.
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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