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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A radioactivity logging method used in boreholes in which a neutron source provides neutrons which enter rock formations encountered and induce additional gamma radiation which is measured by use of an ionization chamber.  2, record 1, English, - neutron%20logging

Record number: 1, Textual support number: 1 CONT

... neutrons can be emitted from a substance when its nucleus is penetrated by gamma particles from a highly radioactive source. This property is used in neutron logging.  3, record 1, English, - neutron%20logging

Record number: 1, Textual support number: 1 OBS

The gamma radiation so induced [by the neutrons which enter rock formations] is related to the hydrogen content of the rock.  2, record 1, English, - neutron%20logging

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

diagraphie : Méthodes de mesure de certains paramètres physiques des formations traversées par le sondage [...] traduit parfois, mais improprement, par carottage [...]  1, record 1, French, - diagraphie%20de%20neutrons

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Measurement of the effects of formation bombardment by neutrons.  1, record 2, English, - neutron%20log

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Mesure des effets du bombardement des formations par des neutrons.  2, record 2, French, - diagraphie%20neutron

Record number: 2, Textual support number: 1 CONT

Parmi les diagraphies différées les plus usitées, nous retiendrons :[...] la radioactivité induite obtenue par bombardement de neutrons ou de rayons [gamma] «diagraphie neutron», basse énergie(4 à 6 MeV), mesurant le pourcentage d’atomes H(eau, hydrocarbures) ;[...]  3, record 2, French, - diagraphie%20neutron

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Parmi les diagraphies différées les plus usitées, nous retiendrons :[...] la «radioactivité induite» obtenue par bombardement de neutrons ou de rayon [gamma] [...] «diagraphie du temps de relaxation neutronique» par bombardement de neutrons de haute énergie(14 MeV), mesurant la section de capture totale des noyaux atomiques des roches et des fluides; [...]  1, record 3, French, - diagraphie%20du%20temps%20de%20relaxation%20neutronique

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, 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 4, English, - pulsed%20neutron%20log

Record number: 4, Textual support number: 1 OBS

[This log] is marketed under several names, e.g. Neutron Lifetime Log, Thermal Decay Time Log.  2, record 4, English, - pulsed%20neutron%20log

Record 4,  Textual support,  French

Record number: 4, 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 4, French, - diagraphie%20de%20relaxation%20neutronique

Record number: 4, 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 4, French, - diagraphie%20de%20relaxation%20neutronique

Record number: 4, Textual support number: 1 OBS

Neutron Lifetime Log : Dénomination d’une diagraphie de neutrons pulsés.  2, record 4, French, - diagraphie%20de%20relaxation%20neutronique

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A radioactivity log curve that indicates the intensity of radiation (neutrons or gamma rays) produced when the rocks in a borehole are bombarded by neutrons from a sonde. It indicates the presence of fluids (but does not distinguish between oil and water) in the rocks, and is used with the gamma-ray log to differentiate porous from nonporous formations.  3, record 5, English, - neutron%20log

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Enregistrement continu de la teneur en hydrogène des couches rencontrées au cours d’un sondage pour la recherche d’hydrocarbures.  3, record 5, French, - diagraphie%20neutron

Record number: 5, Textual support number: 1 CONT

Semblable dans sa conception au diagramme de rayons-gamma, le diagramme neutron emploie une source de rayonnement (en général le béryllium) et n’est pas gêné par le tubage qui a été descendu dans le trou.  3, record 5, French, - diagraphie%20neutron

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

A well log of the wall-contact log type that measures radioactivity induced by neutron-neutron reactions. Fast neutrons of several MeV energy, emitted by a source in the sonde, may be slowed and backscattered as epithermal neutrons (0.4 to 100 ev) by collisions with hydrogen nuclei. Epithermal-neutron abundance is interpreted by assuming a constant lithology, usually limestone, that produces a continuous curve in porosity units. The epithermal-neutron log is largely insensitive to the differences in chlorinity of formation water that may hamper the interpretation of the thermal-neutron log and neutron-gamma log.  2, record 6, English, - epithermal%2Dneutron%20log

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

On peut, soit mesurer les rayons gamma de capture et on obtient un diagramme "Neutron-Gamma", soit mesurer les neutrons thermiques, on obtient un diagramme "Neutrons-Neutrons thermiques" ou bien encore les neutrons épithermiques (non encore complètement ralentis) qui donnent un diagramme "Neutrons-Neutrons épithermiques".  2, record 6, French, - diagraphie%20de%20neutrons%20%C3%A9pithermiques

Record 6,  Textual support,  Spanish