Method and related system of pulsed neutron logging

Details Method and related system of pulsed neutron logging Method and related system of pulsed neutron logging

2006-05-01

2009-02-17

Porta, David P (Department: 2884)

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

Reexamination Certificate

active

07491929

ABSTRACT:
A method and related system of pulsed-neutron logging. At least some of the illustrative embodiments are a method comprising releasing neutrons from a neutron source of a logging tool within a borehole, detecting gamma rays by a sensor on the logging tool (the gamma rays produced by capture of at least some of the neutrons, and wherein the detecting produces sensed gamma rays), determining from the sensed gamma rays a point in time at which gamma rays produced within the borehole reach a predetermined threshold, and using the sensed gamma rays detected after the point in time to determine a parameter of a formation surrounding the borehole.

REFERENCES:
patent: 4475038 (1984-10-01), Lochmann et al.
patent: 5900627 (1999-05-01), Odom et al.
patent: 6207953 (2001-03-01), Wilson
patent: 2005/0028586 (2005-02-01), Smits et al.
patent: 2005/0173153 (2005-08-01), Alft et al.

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