TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PULSED-NEUTRON SURVEY [1 record]

Record 1 2000-04-26

English

Subject field(s)
  • Geophysics
  • Geological Prospecting
DEF

A specialized radioactivity log of neutron-gamma log type. A neutron generator produces short bursts of high-energy neutrons (about 14 MeV), which are slowed in the borehole and nearby rocks to thermal energy level (about 0.025 eV); capture by nuclei (especially chlorine) results in gamma-ray emissions. The log is used in cased oil wells to determine changes in fluid saturation during oil production.

OBS

[This log] is marketed under several names, e.g. Neutron Lifetime Log, Thermal Decay Time Log.

French

Domaine(s)
  • Géophysique
  • Prospection géologique
CONT

[La] diagraphie de neutrons pulsés [...] est appelée «Neutron Lifetime Log» (NLL) par Dresser-Atlas et «Thermal Decaytime Log» (TDT) par Schlumberger. Des neutrons très rapides (14 MeV) sont émis par impulsions de 20 à 30 microsecondes avec une récurrence de 1 000 impulsions par seconde. Les sondes sont de type cylindrique et leur position dans le sondage est indifférente.

CONT

Les diagraphies de relaxation neutroniques TDT ou NLL sont employées pour [...] suivre l'évolution des réservoirs durant la production; évaluer la porosité à travers le tubage; identifier les fluides, eau, gaz, huile.

OBS

Neutron Lifetime Log : Dénomination d'une diagraphie de neutrons pulsés.

Spanish

Save record 1

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: