Method for eliminating effects of acoustic excitations in...

Details Method for eliminating effects of acoustic excitations in... Method for eliminating effects of acoustic excitations in...

2005-05-24

2005-05-24

Arana, Louis (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using well logging device

C324S306000

Reexamination Certificate

active

06897651

ABSTRACT:
The invention is a method of reducing the effects of non-formation signals in an NMR logging 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. The 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.

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patent: 0967490 (1999-12-01), None

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