Pulsed neutron decay logging

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

250264, 2502695, 364422, 395929, G01V 510

Patent

active

055369383

ABSTRACT:
A borehole logging tool having a pair of spaced-apart detectors records intensity signals representing the die-away of nuclear radiation in a subsurface formation. Weighted moments of the intensity signals as well as of a model are produced. Corresponding weighted intensity and model moments are equated and simultaneously solved to obtain values for a borehole decay constant, a formation decay constant, and a formation-to-borehole amplitude ratio for each of the pair of detectors. From these values a trained neural network produces intrinsic values of a formation macroscopic thermal neutron absorption cross section, a formation porosity, and a borehole fluid cross section. A log is generated of these intrinsic values versus depth as the logging tool traverses the borehole.

REFERENCES:
patent: 3719827 (1973-03-01), Dennis
patent: 3984694 (1976-10-01), Dennis
patent: 4298805 (1981-11-01), Dennis
patent: 4409481 (1983-11-01), Smith et al.
patent: 4581532 (1986-04-01), Givens et al.
patent: 4926044 (1990-05-01), Wraight
patent: 5068531 (1991-11-01), Allen et al.
patent: 5251286 (1993-10-01), Wiener et al.
patent: 5300770 (1994-04-01), Allen et al.
patent: 5345077 (1994-09-01), Allen et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Pulsed neutron decay logging does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pulsed neutron decay logging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulsed neutron decay logging will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1786190

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.