Method for eliminating ringing during a nuclear magnetic...

Details Method for eliminating ringing during a nuclear magnetic... Method for eliminating ringing during a nuclear magnetic...

G - Physics

01

V

G01V 3/32 (2006.01) G01R 33/44 (2006.01) G01R 33/46 (2006.01)

Patent

CA 2273126

The present invention relates generally to a method for eliminating ringing while measuring nuclear magnetic resonance properties of an earth formation traversed by a borehole. The measurement can be made while drilling or using a wireline tool. During a first time period of a single pulse sequence, the measurement includes the desired spin-echoes and the undesired effects, that is, ringing, measurement noise, and baseline shift. During a second time period of the single pulse sequence, the spin-echoes are eliminated but not the undesired effects. Using the signal collected during the second time period, the signals measured during the first time period are corrected to eliminate the ringing component, measurement noise, and baseline shift.

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