Method of measuring flow velocities using tracer techniques

Details Method of measuring flow velocities using tracer techniques Method of measuring flow velocities using tracer techniques

1994-06-27

1996-08-06

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250260, 250302, 250303, 2503561, 2503562, G01V 504

Patent

active

055436170

ABSTRACT:
A method of measuring flow velocities in flowing fluids includes injecting into the flow a non-radioactive tracer having a neutron capture cross section higher than that of the flowing fluids, for example a gadolinium compound, and measuring the neutron capture cross section in the fluid downstream of the injection point to detect the passage of the tracer and hence determine the time of flight. By making the tracer miscible with only one phase (typically the continuous phase) of a multi-phase fluid, it is possible to measure the flow velocity of that phase. The neutron capture cross section can be measured by irradiating with neutrons from a pulsed neutron generator and measuring capture .gamma. rays with a scintillation detector.

REFERENCES:
patent: 4825072 (1989-04-01), McWhirter et al.

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