Electricity: measuring and testing – Particle precession resonance – Using well logging device
Patent
1997-12-23
2000-04-18
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Using well logging device
G01V 300
Patent
active
060519738
ABSTRACT:
A logging while drilling (LWD) and measuring while drilling (MWD) method and device are disclosed for reducing the sensitivity of NMR measurements to tool motions. The invention is based on NMR relaxation measurements determining longitudinal relaxation times T1 instead of the standard T2 measurements, and involves saturating a relatively wide sensitive region of the formation and processing NMR echo signals which originate approximately from the center of the sensitive region.
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Arana Louis
Numar Corporation
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