Computer-controlled portable pulsed nmr instrument

Details Computer-controlled portable pulsed nmr instrument Computer-controlled portable pulsed nmr instrument

G - Physics

01

V

324/1.2

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

Patent

CA 1175483

ABSTRACT OF THE DISCLOSURE "COMPUTER-CONTROLLED, PORTABLE PULSED NMR INSTRUMENT AND METHOD OF USE WHEREIN THE TIMES OF RF INTERROGATION ARE DISTRIBUTED OVER AT LEAST A CYCLE AT THE NUCLEAR MAGNETIZATION PRECESSIONAL FREQUENCY" In accordance with the present invention, fluid-flow properties of a rock sample based on NMR response of the hydrogen nuclei of interstitial fluids within the pore space of such sample, can be swiftly and accurately achieved using a computer- controlled, portable NMR instrument. The inherent instrument inadequacy of a DC field inhomogeneity is controllably augmented by an adaptively generated gating code (provided via a computer-controller in feedback relationship with an oscillator-master clock controlling a transmitter-pulser) to ensure that the nuclear magnetization precessional frequency is not a multiple of the RF interrogation frequency. Result: Even though the instrument is placed at field sites away from the usual processing center, quick analysis of rock samples as during the drilling of a well, still results.

400983

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