Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1975-11-03
1977-06-28
Willis, Davis L.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250265, 250270, G01v 500
Patent
active
040327809
ABSTRACT:
Measurement of the volume flow rate and linear flow velocity of undesired behind casing water flow is provided. A well tool having a 14 MEV neutron source is used to continuously irradiate earth formations behind well casing. The continuous neutron irradiation activates elemental oxygen nuclei comprising the molecular structure of any undesired water flow to be detected. Dual spaced gamma ray detectors located above or below the neutron source detect the decay of unstable isotope nitrogen 16 and from these indications the linear flow velocity of the undesired water flow is deduced. By then estimating the distance R to the undesired flow region the volume flow rate V may be deduced.
REFERENCES:
patent: 3239663 (1966-03-01), Oshry et al.
patent: 3603795 (1971-09-01), Allaud
Arnold Dan M.
Paap Hans J.
Peelman Harold E.
Beard William J.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
Willis Davis L.
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