Correction of NMR artifacts due to axial motion and...

Details Correction of NMR artifacts due to axial motion and... Correction of NMR artifacts due to axial motion and...

2008-04-15

2008-04-15

Shrivastav, Brij B. (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using well logging device

C324S300000

Reexamination Certificate

active

07358725

ABSTRACT:
NMR spin echo signals are corrected for axial motion of the borehole logging tool. The correction is applied to an averaged echo train using an average velocity determined from surface measurements over the duration of averaging of the echo trains. An additional correction may be applied to correct for excess polarization or incomplete polarization of nuclear spins due to an insufficient wait time between pulse sequences.

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