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NEUTRON LIFETIME LOG [1 record]
Record 1 - internal organization data 2000-04-26
Record 1, English
Record 1, Subject field(s)
- Geophysics
- Geological Prospecting
Record 1, Main entry term, English
- pulsed neutron log
1, record 1, English, pulsed%20neutron%20log
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- pulsed-neutron-capture log 2, record 1, English, pulsed%2Dneutron%2Dcapture%20log
correct
- pulsed-neutron survey 3, record 1, English, pulsed%2Dneutron%20survey
correct
- Neutron Lifetime Log 4, record 1, English, Neutron%20Lifetime%20Log
correct, trademark
- NLL 5, record 1, English, NLL
correct, trademark
- NLL 5, record 1, English, NLL
- Thermal Decay Time log 4, record 1, English, Thermal%20Decay%20Time%20log
correct, trademark
- TDT log 5, record 1, English, TDT%20log
correct, trademark
- TDT log 5, record 1, English, TDT%20log
Record 1, Textual support, English
Record number: 1, Textual support number: 1 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. 2, record 1, English, - pulsed%20neutron%20log
Record number: 1, Textual support number: 1 OBS
[This log] is marketed under several names, e.g. Neutron Lifetime Log, Thermal Decay Time Log. 2, record 1, English, - pulsed%20neutron%20log
Record 1, French
Record 1, Domaine(s)
- Géophysique
- Prospection géologique
Record 1, Main entry term, French
- diagraphie de relaxation neutronique
1, record 1, French, diagraphie%20de%20relaxation%20neutronique
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- diagraphie de neutrons pulsés 1, record 1, French, diagraphie%20de%20neutrons%20puls%C3%A9s
correct, feminine noun
- Neutron Lifetime Log 1, record 1, French, Neutron%20Lifetime%20Log
correct, trademark
- Thermal Decaytime Log 1, record 1, French, Thermal%20Decaytime%20Log
correct, trademark
Record 1, Textual support, French
Record number: 1, Textual support number: 1 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. 1, record 1, French, - diagraphie%20de%20relaxation%20neutronique
Record number: 1, Textual support number: 2 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. 1, record 1, French, - diagraphie%20de%20relaxation%20neutronique
Record number: 1, Textual support number: 1 OBS
Neutron Lifetime Log : Dénomination d'une diagraphie de neutrons pulsés. 2, record 1, French, - diagraphie%20de%20relaxation%20neutronique
Record 1, Spanish
Record 1, Textual support, Spanish
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