Epithermal neutron decay logging

Details Epithermal neutron decay logging Epithermal neutron decay logging

1979-06-25

1981-08-11

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, G01V 500

Patent

active

042836247

ABSTRACT:
Method and apparatus for epithermal neutron decay logging wherein the formation under investigation is irradiated with bursts of fast neutrons which are moderated therein to form a population of epithermal neutrons. The decay rate of epithermal neutrons within the formation is measured within an energy range having lower limit which is less than the chemical binding energy of bound hydrogen in the formation. In addition, the decay rate of epithermal neutrons within the formation is measured within a second energy range having a lower limit which is greater than the lower limit of the first energy range.

REFERENCES:
patent: 3385969 (1968-05-01), Nelligan
patent: 3487211 (1969-12-01), Youmans
patent: 3497692 (1970-02-01), Mills, Jr.
patent: 3800150 (1974-03-01), Givens
patent: 4097737 (1978-06-01), Mills, Jr.

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