Nuclear magnetic resonance fluid characterization apparatus...

Details Nuclear magnetic resonance fluid characterization apparatus... Nuclear magnetic resonance fluid characterization apparatus...

G - Physics

01

V

G01V 3/14 (2006.01) G01R 33/44 (2006.01) G01R 33/46 (2006.01) G01V 3/32 (2006.01)

Patent

CA 2264204

A method for characterizing a fluid sample withdrawn from an earth formation. The method includes performing nuclear magnetic resonant spin echo measurements on the fluid sample at a nuclear magnetic resonant frequency of carbon-13. Amplitudes of the spin echo measurements are summed. The summed measurements are spectrally analyzed. The fluid is characterized by determining whether aromatic hydrocarbons are present by measuring an amplitude of the spectrally analyzed spin echo measurements at about 130 part per million shift from the carbon-13 frequency. The fluid is also characterized by determining whether aliphatic hydrocarbons re present by measuring an amplitude of the spectrally analyzed spin echo measurements at about 30 parts per million frequency shift.

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