Three frequency modulated thermal neutron lifetime log

Details Three frequency modulated thermal neutron lifetime log Three frequency modulated thermal neutron lifetime log

1974-07-17

1976-02-24

Borchelt, Archie R.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250262, 250391, G01V 500

Patent

active

039406130

ABSTRACT:
Methods are disclosed for measuring simultaneously the thermal neutron lifetime of the borehole fluid and earth formations in the vicinity of a well borehole. A harmonically intensity modulated source of fast neutrons is used to irradiate the earth formations with fast neutrons at three different intensity modulation frequencies. Intensity modulated clouds of thermal neutrons at each of the three modulation frequencies are detected by a single spaced detector and the relative phase shift of the thermal neutrons with respect to the fast neutrons is determined at each of the three modulation frequencies. These measurements are then combined to determine simultaneously the thermal neutron decay time of the borehole fluid and the surrounding earth formation media.

REFERENCES:
patent: 3133195 (1964-05-01), Jones et al.
patent: 3171961 (1965-03-01), Yule
patent: 3638484 (1972-02-01), Tixier

Affiliated with

Also associated with

Rating

Three frequency modulated thermal neutron lifetime log does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Three frequency modulated thermal neutron lifetime log, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three frequency modulated thermal neutron lifetime log will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2081031