Flow measurement using NMR

Details Flow measurement using NMR Flow measurement using NMR

2007-02-20

2008-12-02

Vargas, Dixomara (Department: 2831)

Electricity: measuring and testing

Particle precession resonance

Using well logging device

Reexamination Certificate

active

07459907

ABSTRACT:
A nuclear magnetic resonance (NMR) method is used to determine a velocity distribution or velocity image of a flowing fluid in a downhole environment. The method comprises applying a radio frequency pulse sequence; applying a magnetic field gradient magnetic field and a gradient pulse duration; measuring a NMR signal; determining a phase characteristic of the NMR signal; and determining the velocity distribution or image of the fluid using the determined phase characteristic, the magnetic field gradient pulse parameters, and a time delay between gradient pulses.

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